ITIS Taxon Author Search results citing "A. Gray"

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Taxon author: A. Gray

ITIS records citing taxon author "A. Gray"


Kingdom Plantae
	Abronia cycloptera A. Gray -- not accepted
	Abutilon berlandieri A. Gray ex S. Watson -- accepted -- Berlandier's Indian mallow
	Abutilon hulseanum (Torr. & A. Gray) Torr. ex A. Gray -- accepted -- mauve
	Abutilon hypoleucum A. Gray -- accepted -- whiteleaf Indian mallow
	Abutilon palmeri A. Gray -- accepted -- Palmer's Indian mallow
	Abutilon parvulum A. Gray -- accepted -- dwarf abutilon, dwarf Indian mallow
	Abutilon sonorae A. Gray -- not accepted
	Abutilon texense Torr. & A. Gray -- not accepted
	Abutilon thurberi A. Gray -- not accepted -- Thurber's Indian mallow
	Abutilon wrightii A. Gray -- accepted -- Wright's abutilon, Wright's Indian mallow
	Acacia angustissima var. texensis (Torr. & A. Gray) Isely -- accepted -- prairie wattle, whiteball acacia
	Acacia greggii A. Gray -- not accepted -- catclaw, catclaw acacia, devilsclaw, Gregg's catclaw, Texas catclaw
	Acacia greggii var. greggii A. Gray -- not accepted -- Arizona acacia, catclaw, catclaw acacia, catclaw mimosa
	Acacia koa A. Gray -- accepted -- koa
	Acacia richii A. Gray -- accepted -- Tasmanian wattle
	Acacia texensis Torr. & A. Gray -- not accepted
	Acaena exigua A. Gray -- accepted -- liliwai
	Acaena exigua var. exigua A. Gray -- not accepted
	Acalypha gracilens A. Gray -- accepted -- slender copperleaf, slender threeseed mercury
	Acalypha gracilens ssp. monococca (Engelm. ex A. Gray) G.L. Webster -- not accepted
	Acalypha gracilens var. gracilens A. Gray -- not accepted -- slender threeseed mercury
	Acalypha gracilens var. monococca Engelm. ex A. Gray -- not accepted
	Acalypha monococca (Engelm. ex A. Gray) Lill. W. Mill. & Gandhi -- accepted -- slender threeseed mercury
	Acalypha virginica var. gracilens (A. Gray) M�ll. Arg. -- not accepted
	Acalypha virginica var. monococca (Engelm. ex A. Gray) M�ll. Arg. -- not accepted
	Acamptopappus (A. Gray) A. Gray -- accepted -- goldenhead
	Acamptopappus shockleyi A. Gray -- accepted -- Shockley's goldenhead
	Acamptopappus sphaerocephalus (Harv. & A. Gray ex A. Gray) A. Gray -- accepted -- rayless goldenhead
	Acamptopappus sphaerocephalus var. sphaerocephalus (Harv. & A. Gray ex A. Gray) A. Gray -- accepted -- rayless goldenhead
	Acanthogonum polygonoides (Torr. & A. Gray) Goodman -- not accepted
	Acanthomintha (A. Gray) A. Gray -- accepted -- thorn-mint, thornmint
	Acanthomintha ilicifolia (A. Gray) A. Gray -- accepted -- San Diego thorn-mint, San Diego thornmint
	Acer californica (Torr. & A. Gray) Wesm. -- not accepted
	Acer californicum (Torr. & A. Gray) D. Dietr. -- not accepted
	Acer glabrum var. tripartitum (Nutt. ex Torr. & A. Gray) Pax -- not accepted
	Acer negundo ssp. californicum (Torr. & A. Gray) Wesm. -- not accepted
	Acer negundo var. californicum (Torr. & A. Gray) Sarg. -- accepted -- box elder, California boxelder
	Acer rubrum var. trilobum Torr. & A. Gray ex K. Koch -- accepted -- red maple
	Acer tripartitum Nutt. ex Torr. & A. Gray -- not accepted
	Acerates viridiflora var. linearis A. Gray -- not accepted
	Achillea millefolium var. rosea (Desf.) Torr. & A. Gray -- not accepted
	Achyranthes mutica A. Gray -- accepted -- blunt chaff flower
	Achyronychia Torr. & A. Gray -- accepted
	Achyronychia cooperi Torr. & A. Gray -- accepted -- Cooper's frostmat, onyxflower
	Acleisanthes A. Gray -- accepted -- trumpets
	Acleisanthes anisophylla A. Gray -- accepted -- obliqueleaf trumpets
	Acleisanthes berlandieri A. Gray -- not accepted
	Acleisanthes chenopodioides (A. Gray) R.A. Levin -- accepted -- goosefoot moonpod
	Acleisanthes crassifolia A. Gray -- accepted -- Texas trumpets
	Acleisanthes diffusa (A. Gray) R.A. Levin -- accepted -- spreading moonpod
	Acleisanthes longiflora A. Gray -- accepted -- angel trumpet, angel's trumpets
	Acleisanthes wrightii (A. Gray) Benth. & Hook. f. ex Hemsl. -- accepted -- Wright's trumpets
	Acmispon argophyllus (A. Gray) Brouillet -- accepted -- silver bird's-foot trefoil
	Acmispon argophyllus var. argophyllus (A. Gray) Brouillet -- accepted -- silver bird's-foot trefoil
	Acmispon argophyllus var. fremontii (A. Gray) Brouillet -- accepted -- Fremont's birdsfoot trefoil
	Acmispon heermannii var. orbicularis (A. Gray) Brouillet -- accepted -- Heermann's bird's-foot trefoil
	Acmispon wrightii (A. Gray) Brouillet -- accepted -- Wright's deervetch
	Acnida australis A. Gray -- not accepted
	Aconitum noveboracense A. Gray ex Coville -- not accepted -- northern blue monkshood, northern wild monkshood
	Aconitum reclinatum A. Gray -- accepted -- trailing white monkshood
	Aconitum uncinatum ssp. noveboracense (A. Gray ex Coville) Hardin -- not accepted
	Aconogonon davisiae (W.H. Brewer ex A. Gray) Soj�k -- accepted -- Davis' knotweed
	Aconogonon davisiae var. davisiae (W.H. Brewer ex A. Gray) Soj�k -- accepted -- Davis' knotweed
	Aconogonum davisiae (W.H. Brewer ex A. Gray) Soj�k -- not accepted
	Acourtia nana (A. Gray) Reveal & King -- accepted -- desert holly, dwarf desertpeony
	Acourtia thurberi (A. Gray) Reveal & King -- accepted -- Thurber's desertpeony
	Acourtia wrightii (A. Gray) Reveal & King -- accepted -- brownfoot, pink perezzia, Wright's desertpeony
	Acronychia heterophylla A. Gray -- accepted
	Actaea racemosa var. dissecta (A. Gray) J. Compton -- not accepted
	Actinea cooperi (A. Gray) Kuntze -- not accepted
	Actinea grandiflora (Torr. & A. Gray ex A. Gray) Kuntze -- not accepted
	Actinea vaseyi (A. Gray) Kuntze -- not accepted
	Actinella argentea A. Gray -- not accepted
	Actinella richardsonii var. floribunda A. Gray -- not accepted
	Actinomeris longifolia A. Gray -- not accepted
	Actinospermum angustifolium (Pursh) Torr. & A. Gray -- not accepted
	Acuan leptolobum (Torr. & A. Gray) Kuntze -- not accepted
	Adenophyllum cooperi (A. Gray) Strother -- accepted -- Cooper's dogweed, Cooper's dyssodia
	Adenophyllum porophylloides (A. Gray) Strother -- accepted -- San Felipe dogweed, San Felipe dyssodia
	Adenophyllum wrightii A. Gray -- accepted -- Wright's dogweed
	Aesculus pavia var. discolor (Pursh) A. Gray -- not accepted
	Agalinis paupercula (A. Gray) Britton -- not accepted -- smallflower false foxglove
	Agalinis paupercula var. paupercula (A. Gray) Britton -- not accepted -- smallflower false foxglove
	Agassizia suavis A. Gray & Engelm. -- not accepted
	Agastache breviflora (A. Gray) Epling -- accepted -- Trans-Pecos giant hyssop
	Agastache breviflora var. havardii (A. Gray) Shinners -- not accepted
	Agastache micrantha (A. Gray) Wooton & Standl. -- accepted -- white giant hyssop
	Agastache pallidiflora ssp. havardii (A. Gray) Lint & Epling -- not accepted
	Agastache pallidiflora ssp. neomexicana var. havardii (A. Gray) R.W. Sanders -- not accepted -- Bill Williams Mountain giant hyssop, Havard's giant hyssop
	Agastache pallidiflora var. havardii (A. Gray) R.W. Sanders -- accepted -- Bill Williams Mountain giant hyssop
	Ageratina altissima var. angustata (A. Gray) Clewell & Woot. -- not accepted -- white snakeroot
	Ageratina aromatica var. incisa (A. Gray) C.F. Reed -- not accepted -- lesser snakeroot
	Ageratina herbacea (A. Gray) King & H. Rob. -- accepted -- fragrant snakeroot, herbaceous joepyeweed
	Ageratina paupercula (A. Gray) King & H. Rob. -- accepted -- Santa Rita snakeroot
	Ageratina rothrockii (A. Gray) King & H. Rob. -- accepted -- Rothrock's snakeroot
	Ageratina wrightii (A. Gray) King & H. Rob. -- accepted -- Wright's snakeroot
	Ageratum littorale A. Gray -- not accepted -- Cape Sable whiteweed
	Agnorhiza bolanderi (A. Gray) W.A. Weber -- accepted -- Bolander's mule-ears
	Agnorhiza ovata (Torr. & A. Gray ex Torr.) W.A. Weber -- accepted -- southern mule-ears
	Agoseris alpestris (A. Gray) Greene -- not accepted
	Agoseris aurantiaca ssp. purpurea (A. Gray) G.W. Douglas -- not accepted
	Agoseris aurantiaca var. purpurea (A. Gray) Cronquist -- accepted -- orange agoseris, pale agoseris
	Agoseris barbellulata (Greene ex A. Gray) Greene -- not accepted
	Agoseris glauca var. dasycephala (Torr. & A. Gray) Jeps. -- accepted -- pale agoseris, pale goat-chicory
	Agrimonia eupatoria var. mollis Torr. & A. Gray -- not accepted
	Agrimonia incisa Torr. & A. Gray -- accepted -- incised agrimony, incised groovebur
	Agrimonia mollis (Torr. & A. Gray) Britton -- not accepted
	Agrostis alba var. aristata A. Gray -- not accepted
	Agrostis alopecuroides (Buckley) A. Gray -- not accepted
	Agrostis barbata Buckley ex A. Gray -- not accepted
	Agrostis heterolepis (A. Gray) Alph. Wood -- not accepted
	Agrostis michauxii var. laxiflora (Michaux) A. Gray -- not accepted
	Agrostis oregonensis Nutt. ex A. Gray -- not accepted
	Agrostis scabrata Nutt. ex A. Gray -- not accepted
	Agrostis vulgaris var. aristata A. Gray -- not accepted
	Aira caespitosa var. arctica (Spreng.) Thurb. ex A. Gray -- not accepted
	Aldenella tenuifolia (Torr. & A. Gray) Greene -- not accepted
	Alectoroctonum wrightii (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
	Aletes anisatus (A. Gray) W.L. Theob. & C.C. Tseng -- accepted -- Rocky Mountain Indian parsley
	Aletes nuttallii (A. Gray) W.A. Weber -- not accepted
	Aletes tenuifolius (Nutt. ex Torr. & A. Gray) W.A. Weber -- not accepted
	Aliciella caespitosa (A. Gray) J.M. Porter -- accepted -- Rabbit Valley gilia, wonderland Alice-flower
	Aliciella cespitosa (A. Gray) J.M. Porter -- not accepted -- wonderland Alice-flower
	Aliciella haydenii (A. Gray) J.M. Porter -- accepted -- San Juan gilia
	Aliciella leptomeria (A. Gray) J.M. Porter -- accepted -- sand gilia
	Aliciella micromeria (A. Gray) J.M. Porter -- accepted -- dainty gilia
	Aliciella pinnatifida (Nutt. ex A. Gray) J.M. Porter -- accepted -- sticky gilia
	Aliciella stenothyrsa (A. Gray) J.M. Porter -- accepted -- Uinta Basin gilia
	Aliciella subnuda (Torr. ex A. Gray) J.M. Porter -- accepted -- coral gilia
	Alisma lanceolatum A. Gray -- not accepted -- lanceleaf water plantain
	Allioniella oxybaphoides (A. Gray) Rydb. -- not accepted
	Allium occidentale A. Gray -- not accepted
	Allocarya glaber (A. Gray) J.F. Macbr. -- not accepted
	Allocarya greenei (A. Gray) Greene -- not accepted
	Allocarya lithocarya Greene ex A. Gray -- not accepted
	Allocarya mollis (A. Gray) Greene -- not accepted
	Allocarya trachycarpa (A. Gray) Greene -- not accepted
	Allotropa Torr. & A. Gray ex A. Gray -- accepted -- sugar stick, sugarstick
	Allotropa virgata Torr. & A. Gray ex A. Gray -- accepted -- sugarstick
	Aloysia wrightii (A. Gray) A. Heller -- accepted -- lemon verbena, mintbush lippia, Wright's aloysia, Wright's beebrush, Wright's lippia
	Alyxia oliviformis var. myrtillifolia A. Gray ex Hillebr. -- not accepted
	Amaranthus australis (A. Gray) J.D. Sauer -- accepted -- southern amaranth
	Amaranthus obcordatus (A. Gray) Standl. -- accepted -- Trans-Pecos amaranth
	Amaranthus torreyi (A. Gray) Benth. ex S. Watson -- accepted -- Torrey's amaranthus
	Amaranthus torreyi auct. non (A. Gray) Benth. ex S. Watson -- not accepted
	Amaranthus torreyi auct. non (A. Gray) Benth. ex S. Watson -- not accepted
	Amauria dissecta A. Gray -- not accepted
	Amauriopsis dissecta (A. Gray) Rydb. -- accepted -- ragleaf bahia
	Ambrosia canescens A. Gray -- accepted -- hairy ragweed
	Ambrosia cheiranthifolia A. Gray -- accepted -- Rio Grande ragweed, South Texas ambrosia
	Ambrosia cordifolia (A. Gray) Payne -- accepted -- heartleaf bursage, Tucson bur ragweed, Tucson burr ragweed
	Ambrosia coronopifolia Torr. & A. Gray -- not accepted
	Ambrosia dumosa (A. Gray) Payne -- accepted -- burrobush, white bursage
	Ambrosia eriocentra (A. Gray) Payne -- accepted -- hollyleaf bursage, woolly bursage, woolly fruit bur ragweed, woolly fruit burr ragweed, wooly bursage
	Ambrosia ilicifolia (A. Gray) Payne -- accepted -- hollyleaf bur ragweed, hollyleaf burr ragweed, hollyleaf bursage
	Ambrosia monogyra (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- singlewhorl burrobrush
	Ambrosia psilostachya var. coronopifolia (Torr. & A. Gray) Farw. -- not accepted
	Ambrosia pumila (Nutt.) A. Gray -- accepted -- dwarf bur ragweed, dwarf burr ragweed, San Diego ambrosia, San Diego ragweed
	Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- burrobrush
	Ambrosia salsola var. salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- not accepted
	Ambrosia trifida var. integrifolia (Muhl. ex Willd.) Torr. & A. Gray -- not accepted
	Amelanchier alnifolia var. pumila (Torr. & A. Gray) C.K. Schneid. -- accepted -- dwarf serviceberry
	Amelanchier canadensis var. pumila Torr. & A. Gray -- not accepted -- Canadian serviceberry
	Amelanchier oblongifolia (Torr. & A. Gray) M. Roem. -- not accepted
	Amelanchier pumila (Torr. & A. Gray) Nutt. ex M. Roem. -- not accepted -- dwarf serviceberry
	Amianthium A. Gray -- accepted -- amianthium
	Amianthium muscaetoxicum (Walter) A. Gray -- not accepted -- flypoison
	Amianthium muscitoxicum (Walter) A. Gray -- accepted -- flypoison
	Ammobroma Torr. ex A. Gray -- not accepted
	Ammobroma sonorae Torr. ex A. Gray -- not accepted
	Ammocodon chenopodioides (A. Gray) Standl. -- not accepted -- goosefoot moonpod
	Ammoselinum Torr. & A. Gray -- accepted -- sandparsley
	Ammoselinum popei Torr. & A. Gray -- accepted -- plains sandparsley
	Amoreuxia malvifolia A. Gray -- accepted
	Amoreuxia wrightii A. Gray -- accepted -- Wright's yellowshow
	Amorpha paniculata Torr. & A. Gray -- accepted -- panicled false indigo, panicled indigobush
	Amphicarpaea pitcheri Torr. & A. Gray -- not accepted
	Amphipappus Torr. & A. Gray -- accepted -- amphipappus, chaffbush
	Amphipappus fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaffbush, Fremont's chaffbush
	Amphipappus fremontii ssp. fremontii Torr. & A. Gray ex A. Gray -- not accepted -- Fremont's chaffbush
	Amphipappus fremontii var. fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaff-bush, Fremont's chaffbush
	Amsinckia echinata A. Gray -- not accepted
	Amsinckia grandiflora (Kleeb. ex A. Gray) Kleeb. ex Greene -- accepted -- large-flowered fiddleneck, largeflowered fiddleneck
	Amsinckia intermedia var. echinata (A. Gray) Wiggins -- not accepted
	Amsinckia spectabilis var. bracteosa (A. Gray) B. Boivin -- not accepted
	Amsinckia tessellata A. Gray -- accepted -- bristly fiddleneck, western fiddleneck
	Amsinckia tessellata var. tessellata A. Gray -- accepted -- bristly fiddleneck
	Amsonia brevifolia A. Gray -- not accepted
	Amsonia ciliata var. texana (A. Gray) J.M. Coult. -- accepted -- Texas bluestar
	Amsonia palmeri A. Gray -- accepted -- Palmer's bluestar
	Anaphalis margaritacea var. subalpina A. Gray -- not accepted
	Ancistrocarphus A. Gray -- accepted -- neststraw, woolly fishhooks
	Ancistrocarphus filagineus A. Gray -- accepted -- false neststraw, hooded neststraw
	Androsace arizonica A. Gray -- not accepted
	Androsace laevigata (A. Gray) Wendelbo -- accepted -- cliff dwarf-primrose
	Androsace montana (A. Gray) Wendelbo -- accepted -- Rocky Mountain dwarf-primrose
	Androsace occidentalis var. arizonica (A. Gray) H. St. John -- not accepted
	Androsace septentrionalis ssp. subulifera (A. Gray) G.T. Robbins -- not accepted -- pygmyflower rockjasmine
	Androsace septentrionalis var. subulifera A. Gray -- not accepted
	Anelsonia eurycarpa (A. Gray) J.F. Macbr. & Payson -- accepted -- broad pod anelsonia, daggerpod
	Anemone cylindrica A. Gray -- accepted -- candle anemone, cottonweed
	Anemone decapetala var. heterophylla (Torr. & A. Gray) Britton & Rusby -- not accepted
	Anemone globosa (Torr. & A. Gray) Nutt. ex Pritz. -- not accepted
	Anemone heterophylla Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
	Anemone heterophyllum Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
	Anemone multifida ssp. globosa (Torr. & A. Gray) Torr. & A. Gray -- not accepted
	Anemone multifida var. globosa Torr. & A. Gray -- not accepted
	Anemone oregana A. Gray -- accepted -- blue windflower
	Anemone oregana var. oregana A. Gray -- accepted -- blue windflower
	Anemone patens var. nuttalliana (DC.) A. Gray -- not accepted
	Anemone quinquefolia var. oregana (A. Gray) B.L. Rob. -- not accepted
	Angelica arguta Nutt. ex Torr. & A. Gray -- accepted -- angelica, Lyall's angelica, sharptooth angelica
	Angelica arguta var. breweri (A. Gray) Di Tomaso -- not accepted
	Angelica breweri A. Gray -- accepted -- Brewer's angelica
	Angelica lineariloba A. Gray -- accepted -- poison angelica, Sierra angelica
	Anisacanthus insignis A. Gray -- not accepted
	Anisacanthus thurberi (Torr.) A. Gray -- accepted -- desert honeysuckle, Thurber's desert honeysuckle
	Anisacanthus wrightii (Torr.) A. Gray -- not accepted
	Anisocoma Torr. & A. Gray -- accepted -- anisocoma
	Anisocoma acaulis Torr. & A. Gray -- accepted -- scale bud, scalebud
	Anisophyllum fendleri (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
	Anisophyllum humistratum (Engelm. ex A. Gray) Klotzsch & Garcke -- not accepted
	Anisophyllum melanadenium (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
	Anoda abutiloides A. Gray -- accepted -- Indian anoda
	Anoda arizonica A. Gray -- not accepted
	Anoda cristata var. digitata (A. Gray) Hochr. -- not accepted
	Anoda pentaschista A. Gray -- accepted -- field anoda
	Anoda thurberi A. Gray -- accepted -- Arizona anoda
	Anoda wrightii A. Gray -- not accepted
	Anogra coronopifolia (Torr. & A. Gray) Britton -- not accepted
	Antennaria alpina var. stenophylla A. Gray -- not accepted
	Antennaria dimorpha (Nutt.) Torr. & A. Gray -- accepted -- low everlasting, low pussytoes
	Antennaria dimorpha var. flagellaris A. Gray -- not accepted
	Antennaria flagellaris (A. Gray) A. Gray -- accepted -- stoloniferous pussy-toes, whip pussytoes
	Antennaria geyeri A. Gray -- accepted -- Geyer's everlasting, mountain pussytoes, pinewoods pussytoes
	Antennaria luzuloides Torr. & A. Gray -- accepted -- rush pussytoes
	Antennaria luzuloides ssp. luzuloides Torr. & A. Gray -- accepted -- rush pussytoes
	Antennaria luzuloides var. argentea (Benth.) A. Gray -- not accepted
	Antennaria luzuloides var. microcephala (A. Gray) Cronquist -- not accepted
	Antennaria microcephala A. Gray -- not accepted
	Antennaria monocephala (Torr. & A. Gray) Greene non Antennaria monocephala DC. -- not accepted
	Antennaria plantaginifolia var. monocephala Torr. & A. Gray -- not accepted
	Antennaria stenophylla (A. Gray) A. Gray -- accepted -- narrowleaf everlasting, narrowleaf pussytoes
	Antheropeas lanosum (A. Gray) Rydb. -- not accepted -- white easter-bonnets, white easterbonnets
	Antheropeas wallacei (A. Gray) Rydb. -- not accepted -- Wallace's woolydaisy, woolly easter-bonnets, woolly easterbonnets
	Anticlea occidentalis (A. Gray) Zomlefer & Judd -- accepted -- western featherbells
	Antiphytum floribundum (Torr.) A. Gray -- accepted -- Texas saucerflower
	Antirrhinum breweri A. Gray -- not accepted
	Antirrhinum cooperi A. Gray -- not accepted
	Antirrhinum cornutum var. leptaleum (A. Gray) Munz -- not accepted
	Antirrhinum coulterianum ssp. orcuttianum (A. Gray) Pennell -- not accepted
	Antirrhinum filipes A. Gray -- not accepted
	Antirrhinum leptaleum A. Gray -- not accepted
	Antirrhinum maurandioides A. Gray -- not accepted
	Antirrhinum nuttallianum ssp. subsessile (A. Gray) D.M. Thomps. -- not accepted
	Antirrhinum subcordatum A. Gray -- not accepted -- dimorphic snapdragon
	Antirrhinum subsessile A. Gray -- not accepted
	Antirrhinum vexillocalyculatum ssp. breweri (A. Gray) D.M. Thomps. -- not accepted
	Antirrhinum virga A. Gray -- not accepted
	Antirrhinum wislizeni (Engelm. ex A. Gray) Tidestr. -- not accepted
	Anulocaulis eriosolenus (A. Gray) Standl. -- accepted -- Big Bend ringstem
	Anychiastrum baldwinii (Torr. & A. Gray) Small -- not accepted
	Apargidium Torr. & A. Gray -- not accepted
	Apargidium boreale (Bong.) Torr. & A. Gray -- not accepted
	Aphanostephus arizonicus A. Gray -- not accepted
	Aphanostephus humilis (Benth.) A. Gray -- not accepted
	Aphanostephus riddellii Torr. & A. Gray -- accepted -- Riddell's dozedaisy
	Aphantochaeta exilis A. Gray -- not accepted
	Aphyllon cooperi A. Gray -- not accepted
	Aphyllon fasciculatum (Nutt.) Torr. & A. Gray -- not accepted
	Aphyllon pinorum (Geyer ex Hook.) A. Gray -- not accepted
	Aphyllon tuberosum (A. Gray) A. Gray -- not accepted
	Aphyllon uniflorum (L.) A. Gray -- not accepted
	Apiastrum Nutt. ex Torr. & A. Gray -- accepted
	Aplopappus sphaerocephalus Harv. & A. Gray ex A. Gray -- not accepted
	Aplopappus tortifolius Torr. & A. Gray -- not accepted
	Apocynum album var. hypericifolium A. Gray -- not accepted
	Apocynum androsaemifolium ssp. pumilum (A. Gray) B. Boivin -- not accepted -- spreading dogbane
	Apocynum androsaemifolium ssp. pumilum var. pumilum A. Gray -- not accepted -- low dogbane
	Apocynum androsaemifolium var. pumilum A. Gray -- not accepted
	Apocynum cannabinum var. hypericifolium (Aiton) A. Gray -- not accepted
	Apocynum pumilum (A. Gray) Greene -- not accepted
	Apodanthera undulata A. Gray -- accepted -- melon loco, melon-loco
	Apodanthera undulata var. undulata A. Gray -- accepted
	Aquilegia chrysantha A. Gray -- accepted -- golden columbine
	Aquilegia chrysantha var. chrysantha A. Gray -- not accepted -- golden columbine
	Aquilegia longissima A. Gray ex S. Watson -- accepted -- long spur columbine, longspur columbine
	Arabis arcuata (Nutt.) A. Gray -- not accepted
	Arabis brachycarpa (Torr. & A. Gray) Britton -- not accepted
	Arabis dentata (Torr.) Torr. & A. Gray -- not accepted
	Arabis drummondii A. Gray -- not accepted -- Canadian rockcress, Drummond rockcress, Drummond's rockcress
	Arabis hirsuta var. glabrata Torr. & A. Gray -- not accepted -- mountain rockcress
	Arabis petiolaris (A. Gray) A. Gray -- not accepted -- Brazos rockcress
	Arabis platysperma A. Gray -- not accepted -- pioneer rockcress
	Arabis platysperma var. platysperma A. Gray -- not accepted -- pioneer rockcress
	Aragallus oreophilus (A. Gray) A. Nelson -- not accepted
	Arbutus arizonica (A. Gray) Sarg. -- accepted -- Arizona madrone
	Arbutus xalapensis var. arizonica A. Gray -- not accepted
	Arbutus xalapensis var. texana (Buckley) A. Gray -- not accepted
	Arctostaphylos andersonii A. Gray -- accepted -- Santa Cruz manzanita
	Arctostaphylos bicolor (Nutt.) A. Gray -- not accepted
	Arctostaphylos diversifolia (Parry) Parry ex A. Gray -- not accepted
	Arctostaphylos nevadensis A. Gray -- accepted -- pinemat manzanita
	Arctostaphylos nevadensis ssp. nevadensis A. Gray -- accepted -- pine-mat manzanita, pinemat manzanita
	Arctostaphylos nummularia A. Gray -- accepted -- glossyleaf manzanita
	Arctostaphylos nummularia A. Gray -- not accepted
	Arctostaphylos nummularia ssp. nummularia A. Gray -- accepted -- glossyleaf manzanita
	Arctostaphylos patula ssp. platyphylla (A. Gray) P.V. Wells -- not accepted
	Arctostaphylos pungens ssp. nevadensis (A. Gray) Roof -- not accepted
	Arctous (A. Gray) Nied. -- accepted -- bearberry
	Arcytophyllum fasciculatum (A. Gray) Terrell & H. Rob. -- accepted
	Arenaria benthamii Fenzl ex Torr. & A. Gray -- accepted -- hilly sandwort
	Arenaria brevifolia Nutt. ex Torr. & A. Gray -- not accepted
	Arenaria californica (A. Gray) W.H. Brewer -- not accepted
	Arenaria congesta var. suffrutescens (A. Gray) B.L. Rob. -- not accepted -- suffrutescent sandwort
	Arenaria douglasii Fenzl ex Torr. & A. Gray -- not accepted
	Arenaria fendleri A. Gray -- not accepted -- Fendler's sandwort
	Arenaria fendleri var. fendleri A. Gray -- not accepted -- Fendler's sandwort
	Arenaria lanuginosa ssp. saxosa (A. Gray) Maguire -- not accepted -- spreading sandwort
	Arenaria lanuginosa var. saxosa (A. Gray) Zarucchi, R.L. Hartm. & Rabeler -- accepted -- spreading sandwort
	Arenaria saxosa A. Gray -- not accepted
	Argemone hispida A. Gray -- accepted -- rough prickly poppy, rough pricklypoppy
	Argemone platyceras var. hispida (A. Gray) Prain -- not accepted
	Argyroxiphium macrocephalum A. Gray -- not accepted
	Argyroxiphium sandwicense ssp. macrocephalum (A. Gray) M�rat -- accepted -- `ahinahina, Haleakala silversword, Hawai'i silversword
	Argythammia humilis (Engelm. & A. Gray) M�ll. Arg. -- not accepted
	Argythamnia adenophora A. Gray -- not accepted -- glandular silverbush
	Argythamnia adenophora auct. non A. Gray -- not accepted
	Argythamnia humilis (Engelm. & A. Gray) M�ll. Arg. -- not accepted -- low silverbush, low wildmercury
	Argythamnia humilis var. humilis (Engelm. & A. Gray) M�ll. Arg. -- not accepted -- low silverbush, low wildmercury
	Arida blepharophylla (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted -- gypsum tansy-aster
	Arida carnosa (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted -- shrubby alkali tansy-aster, shrubby alkaliaster
	Arida parviflora (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted -- small-flower tansy-aster
	Aristida basiramea var. curtissii (A. Gray) Shinners -- not accepted
	Aristida curtissii (A. Gray) Nash -- not accepted
	Aristida dichotoma var. curtissii A. Gray -- accepted -- Curtis' threeawn
	Aristida gracilis var. depauperata A. Gray -- not accepted
	Aristida ramosissima Engelm. ex A. Gray -- accepted -- s curve threeawn, s-curve threeawn
	Aristida ramosissima f. uniaristata (A. Gray) Mohlenbr. -- not accepted
	Aristida ramosissima var. ramosissima Engelm. ex A. Gray -- accepted -- s-curve threeawn
	Aristida ramosissima var. uniaristata A. Gray -- not accepted
	Aristolochia longiflora Engelm. & A. Gray -- not accepted
	Armoracia lacustris (A. Gray) Al-Shehbaz & V.M. Bates -- not accepted -- armoracie des �tangs, lake-cress
	Arnica chamissonis ssp. foliosa var. incana (A. Gray) Hult�n -- not accepted -- Chamisso arnica, hoary arnica
	Arnica chamissonis ssp. incana (A. Gray) Maguire -- not accepted
	Arnica dealbata (A. Gray) B.G. Baldw. -- accepted -- mock leopardbane
	Arnica discoidea var. eradiata (A. Gray) Cronquist -- not accepted
	Arnica foliosa var. incana A. Gray -- not accepted
	Arnica nevadensis A. Gray -- accepted -- Nevada arnica
	Arnica parryi A. Gray -- accepted -- nodding arnica, Parry's arnica, Sonne's arnica
	Arnica parryi ssp. parryi A. Gray -- not accepted -- Parry's arnica
	Arnica parviflora A. Gray -- not accepted
	Arnica viscosa A. Gray -- accepted -- Mt. Shasta arnica
	Arnoglossum diversifolium (Torr. & A. Gray) H. Rob. -- accepted -- variableleaf Indian plaintain, variableleaf Indian plantain
	Arnoglossum floridanum (A. Gray) H. Rob. -- accepted -- Florida cacalia
	Artemisia bigelovii A. Gray -- accepted -- Bigelow sage, Bigelow sagebrush, Bigelow's sagebrush
	Artemisia bolanderi A. Gray -- not accepted
	Artemisia cana ssp. bolanderi (A. Gray) G.H. Ward -- accepted -- Bolander's silver sagebrush, silver sagebrush
	Artemisia carruthii var. wrightii (A. Gray) S.F. Blake -- not accepted
	Artemisia elatior (Torr. & A. Gray) Rydb. -- not accepted
	Artemisia laciniata ssp. parryi (A. Gray) W.A. Weber -- accepted -- Parry's wormwood
	Artemisia ludoviciana ssp. redolens (A. Gray) D.D. Keck -- accepted -- white sagebrush, white sagewort
	Artemisia ludoviciana var. gnaphalodes (Nutt.) Torr. & A. Gray -- not accepted
	Artemisia ludoviciana var. latifolia (Besser) Torr. & A. Gray -- not accepted
	Artemisia ludoviciana var. mexicana (Willd. ex Spreng.) A. Gray -- not accepted
	Artemisia ludoviciana var. redolens (A. Gray) Shinners -- not accepted
	Artemisia mauiensis (A. Gray) Skottsb. -- accepted -- Maui wormwood
	Artemisia palmeri A. Gray -- accepted -- San Diego sagewort
	Artemisia parryi A. Gray -- not accepted -- Parry's wormwood
	Artemisia pattersonii A. Gray -- accepted -- Patterson's wormwood
	Artemisia pygmaea A. Gray -- accepted -- pygmy sagebrush
	Artemisia redolens A. Gray -- not accepted
	Artemisia rigida (Nutt.) A. Gray -- accepted -- scabland sagebrush
	Artemisia rothrockii A. Gray -- accepted -- timberline sagebrush
	Artemisia scopulorum A. Gray -- accepted -- alpine sagebrush, dwarf sagebrush
	Artemisia tilesii ssp. elatior (Torr. & A. Gray) Hult�n -- not accepted -- Tilesius' wormwood
	Artemisia tilesii var. elatior Torr. & A. Gray -- not accepted
	Artemisia tridentata ssp. bolanderi (A. Gray) H.M. Hall & Clem. -- not accepted
	Artemisia tridentata ssp. parishii (A. Gray) H.M. Hall & Clem. -- accepted -- big sagebrush
	Artemisia tridentata ssp. rothrockii (A. Gray) H.M. Hall & Clem. -- not accepted
	Artemisia tridentata var. angustifolia A. Gray -- not accepted
	Artemisia tridentata var. bolanderi (A. Gray) McMinn -- not accepted
	Artemisia tridentata var. parishii (A. Gray) Jeps. -- not accepted
	Artemisia tridentata var. rothrockii (A. Gray) McMinn -- not accepted
	Artemisia vulgaris var. mexicana (Willd. ex Spreng.) Torr. & A. Gray -- not accepted
	Asanthus squamulosus (A. Gray) King & H. Rob. -- accepted -- Mule Mountain brickellbush
	Asarina filipes (A. Gray) Pennell -- not accepted
	Asarina wislizeni (Engelm. ex A. Gray) Pennell -- not accepted
	Asclepias curtissii A. Gray -- accepted -- Curtiss' milkweed
	Asclepias feayi Chapm. ex A. Gray -- accepted -- Feay's milkweed, Florida milkweed
	Asclepias hallii A. Gray -- accepted -- Hall's milkweed
	Asclepias hypoleuca (A. Gray) Woodson -- accepted -- mahogany milkweed, talayote
	Asclepias lemmonii A. Gray -- accepted -- big-leaf milkweed, bigleaf milkweed, Lemmon's milkweed
	Asclepias meadii Torr. ex A. Gray -- accepted -- Mead's milkweed
	Asclepias nyctaginifolia A. Gray -- accepted -- Mojave milkweed
	Asclepias pumila (A. Gray) Vail -- accepted -- low milkweed, plains milkweed
	Asclepias quinquedentata A. Gray -- accepted -- slim-pod milkweed, slimpod milkweed
	Asclepias stenophylla A. Gray -- accepted -- slimleaf milkweed
	Asclepias subverticillata (A. Gray) Vail -- accepted -- horsetail milkweed, poison milkweed, western whorled milkweed, whorled milkweed
	Asclepias sullivantii Engelm. ex A. Gray -- accepted -- prairie milkweed, Sullivant's milkweed
	Asclepias viridiflora var. linearis (A. Gray) Fernald -- not accepted
	Asclepiodella feayi (Chapm. ex A. Gray) Small -- not accepted
	Asclepiodora decumbens (Nutt.) A. Gray -- not accepted
	Asclepiodora viridis (Walter) A. Gray -- not accepted
	Aspicarpa hyssopifolia A. Gray -- accepted -- hyssopleaf asphead
	Aspicarpa longipes A. Gray -- accepted -- spreading asphead
	Aster alpigenus (Torr. & A. Gray) A. Gray -- not accepted
	Aster alpigenus ssp. andersonii (A. Gray) Onno -- not accepted
	Aster alpigenus var. andersonii (A. Gray) Onno ex M. Peck -- not accepted
	Aster andersonii (A. Gray) A. Gray -- not accepted
	Aster anomalus Engelm. ex Torr. & A. Gray -- not accepted -- manyray aster
	Aster apricus (A. Gray) Rydb. -- not accepted
	Aster ascendens var. fremontii Torr. & A. Gray -- not accepted
	Aster ascendens var. yosemitanus A. Gray -- not accepted
	Aster baldwinii Torr. & A. Gray. -- not accepted
	Aster bigelovii A. Gray -- not accepted
	Aster blepharophyllus A. Gray -- not accepted
	Aster bloomeri A. Gray -- not accepted
	Aster borealis (Torr. & A. Gray) Prov. -- not accepted -- rush aster
	Aster breweri (A. Gray) Semple -- not accepted
	Aster campestris var. bloomeri (A. Gray) A. Gray -- not accepted -- Bloomer's aster
	Aster canescens var. latifolius (A. Gray) A. Gray -- not accepted
	Aster canescens var. viscosus (Nutt.) A. Gray -- not accepted
	Aster chapmanii Torr. & A. Gray -- not accepted -- savannah aster
	Aster chilensis ssp. hallii (A. Gray) Cronquist -- not accepted
	Aster coloradoensis A. Gray -- not accepted
	Aster commutatus (Torr. & A. Gray) A. Gray -- not accepted
	Aster curtisii Torr. & A. Gray -- not accepted
	Aster cusickii A. Gray -- not accepted -- Cusick's aster
	Aster cusickii var. lyallii A. Gray -- not accepted
	Aster diffusus var. thyrsoides A. Gray -- not accepted
	Aster divaricatus (Nutt.) Torr. & A. Gray non L. -- not accepted -- aster � rameaux �tal�s, serpentine aster, white wood aster
	Aster divaricatus var. sandwicensis A. Gray -- not accepted
	Aster dumosus var. cordidifolius (Michx.) Torr. & A. Gray -- not accepted
	Aster dumosus var. coridifolius (Michx.) Torr. & A. Gray -- not accepted
	Aster dumosus var. gracilentus Torr. & A. Gray -- not accepted
	Aster dumosus var. strictior Torr. & A. Gray -- not accepted -- rice button aster
	Aster dumosus var. subulifolius Torr. & A. Gray -- not accepted -- rice button aster
	Aster eatonii (A. Gray) Howell -- not accepted -- Eaton's aster
	Aster elegans (Nutt.) Torr. & A. Gray non Willd. -- not accepted
	Aster elliotti Torr. & A. Gray -- not accepted
	Aster elliottii Torr. & A. Gray -- not accepted
	Aster elodes Torr. & A. Gray -- not accepted
	Aster engelmannii (D.C. Eaton) A. Gray -- not accepted
	Aster engelmannii var. glaucescens A. Gray -- not accepted
	Aster engelmannii var. ledophyllus A. Gray -- not accepted
	Aster ericoides var. commutatus (Torr. & A. Gray) B. Boivin -- not accepted
	Aster ericoides var. commutatus (Torr. & A. Gray) B. Boivin -- not accepted
	Aster ericoides var. platyphyllus Torr. & A. Gray -- not accepted
	Aster ericoides var. pringlei A. Gray -- not accepted
	Aster ericoides var. pusillus A. Gray -- not accepted
	Aster ericoides var. stricticaulis (Torr. & A. Gray) F.C. Gates -- not accepted -- white heath aster
	Aster ericoides var. villosus (Michx.) Torr. & A. Gray -- not accepted
	Aster eryngiifolius Torr. & A. Gray -- not accepted -- thistleleaf aster
	Aster exilis var. australis A. Gray -- not accepted
	Aster falcatus ssp. commutatus (Torr. & A. Gray) A.G. Jones -- not accepted
	Aster falcatus var. commutatus (Torr. & A. Gray) A.G. Jones -- not accepted -- cluster aster
	Aster fendleri A. Gray -- not accepted -- Fendler's aster
	Aster foliaceus var. apricus A. Gray -- not accepted -- leafybract aster
	Aster foliaceus var. burkei A. Gray -- not accepted
	Aster foliaceus var. canbyi A. Gray -- not accepted -- Canby's aster
	Aster foliaceus var. cusickii (A. Gray) Cronquist -- not accepted
	Aster foliaceus var. eatonii A. Gray -- not accepted
	Aster foliaceus var. frondeus A. Gray -- not accepted
	Aster foliaceus var. lyallii (A. Gray) Cronquist -- not accepted
	Aster foliaceus var. parryi (D.C. Eaton) A. Gray -- not accepted -- Parry's aster
	Aster fremonti (Torr. & A. Gray) A. Gray -- not accepted
	Aster fremontii (Torr. & A. Gray) A. Gray -- not accepted
	Aster fremontii var. parishii A. Gray -- not accepted
	Aster frondeus (A. Gray) Greene -- not accepted
	Aster frondosus (Nutt.) Torr. & A. Gray -- not accepted
	Aster geyeri (A. Gray) Howell -- not accepted
	Aster glabriuscula (Nutt.) Torr. & A. Gray -- not accepted
	Aster glabriuscula var. parryi (A. Gray) Onno -- not accepted
	Aster glaucescens (A. Gray) S.F. Blake -- not accepted
	Aster glaucus Torr. & A. Gray non Nees -- not accepted
	Aster gymnocephalus auct. non (DC.) A. Gray -- not accepted
	Aster hallii A. Gray -- not accepted -- Hall's aster
	Aster herveyi A. Gray -- not accepted
	Aster hesperius A. Gray -- not accepted
	Aster intricatus (A. Gray) S.F. Blake -- not accepted
	Aster johannensis var. villicaulis (A. Gray) Fernald -- not accepted
	Aster kumleinii Fr. ex A. Gray -- not accepted
	Aster laevis var. geyeri A. Gray -- not accepted -- Geyer's smooth aster
	Aster lanceolatus ssp. hesperius (A. Gray) Semple & Chmiel. -- not accepted -- Siskiyou aster
	Aster lateriflorus var. thyrsoides (A. Gray) Sheldon -- not accepted
	Aster laxifolius var. borealis Torr. & A. Gray -- not accepted
	Aster ledophyllus (A. Gray) A. Gray -- not accepted -- Cascade aster
	Aster lemmonii A. Gray -- not accepted
	Aster lindleyanus Torr. & A. Gray -- not accepted
	Aster longifolius var. villicaulis A. Gray -- not accepted
	Aster lucidulus (A. Gray) Wiegand -- not accepted
	Aster lutescens (Lindl. ex DC.) Torr. & A. Gray -- not accepted
	Aster mirabilis Torr. & A. Gray -- not accepted -- bouquet aster
	Aster missouriensis var. thyrsoides (A. Gray) Wiegand -- not accepted
	Aster multiflorus var. commutatus Torr. & A. Gray -- not accepted
	Aster multiflorus var. stricticaulis Torr. & A. Gray -- not accepted
	Aster novi-belgii var. elodes (Torr. & A. Gray) A. Gray -- not accepted -- New Belgium aster
	Aster novi-belgii var. litoreus A. Gray -- not accepted -- New Belgium aster
	Aster novi-belgii var. villicaulis (A. Gray) Boivin -- not accepted -- New Belgium aster
	Aster oblongifolius var. rigidulus A. Gray -- not accepted
	Aster occidentalis (Nutt.) Torr. & A. Gray -- not accepted -- western aster
	Aster occidentalis var. fremontii (Torr. & A. Gray) A.G. Jones -- not accepted -- Fremont's aster
	Aster occidentalis var. intermedius A. Gray -- not accepted -- intermediate aster
	Aster occidentalis var. parishii (A. Gray) Ferris -- not accepted -- Parish's aster
	Aster occidentalis var. yosemitanus (A. Gray) Cronquist -- not accepted -- Yosemite aster
	Aster oregonum (Nutt.) Torr. & A. Gray -- not accepted
	Aster oregonus auct. non (Nutt.) Torr. & A. Gray -- not accepted
	Aster palmeri A. Gray non Ericameria palmeri (A. Gray) H.M. Hall -- not accepted
	Aster pantotrichus var. thyrsoides (A. Gray) S.F. Blake -- not accepted
	Aster parryi A. Gray -- not accepted
	Aster parviflorus A. Gray non Nees -- not accepted
	Aster patens var. patentissimus (Lindl. ex DC.) Torr. & A. Gray -- not accepted -- late purple aster
	Aster pattersonii A. Gray -- not accepted
	Aster phyllolepis Torr. & A. Gray -- not accepted
	Aster pilosus var. platyphyllus (Torr. & A. Gray) S.F. Blake -- not accepted
	Aster pilosus var. pringlei (A. Gray) S.F. Blake -- not accepted -- Pringle's aster
	Aster pilosus var. pusillus (A. Gray) A.G. Jones -- not accepted
	Aster porteri A. Gray -- not accepted -- Porter's aster
	Aster potosinus A. Gray -- not accepted -- Santa Rita Mountain aster
	Aster pringlei (A. Gray) Britton -- not accepted
	Aster ptarmicoides (Nees) Torr. & A. Gray -- not accepted
	Aster ptarmicoides var. georgianus A. Gray -- not accepted
	Aster ptarmicoides var. lutescens (Lindl. ex DC.) A. Gray -- not accepted
	Aster puniceus ssp. elliottii (Torr. & A. Gray) A.G. Jones -- not accepted
	Aster puniceus var. elliottii (Torr. & A. Gray) A.G. Jones -- not accepted -- Elliott's aster
	Aster puniceus var. firmus (Nees) Torr. & A. Gray -- not accepted -- purplestem aster
	Aster puniceus var. lucidulus A. Gray -- not accepted
	Aster radula var. strictus (Pursh) A. Gray -- not accepted -- low rough aster
	Aster radulinus A. Gray -- not accepted -- roughleaf aster
	Aster sandwicensis (A. Gray) Hieron. -- not accepted
	Aster scopulorum A. Gray -- not accepted
	Aster shastensis (A. Gray) A. Gray -- not accepted
	Aster shastensis var. eradiatus A. Gray -- not accepted
	Aster sibiricus var. giganteus (Hook.) A. Gray -- not accepted -- giant arctic aster
	Aster simplex var. ramosissimus (Torr. & A. Gray) Cronquist -- not accepted
	Aster sonorae A. Gray -- not accepted
	Aster stenomeres A. Gray -- not accepted
	Aster stricticaulis (Torr. & A. Gray) Rydb. -- not accepted
	Aster subspicatus var. apricus (A. Gray) Boivin -- not accepted
	Aster subulatus var. australis (A. Gray) Shinners -- not accepted
	Aster subulatus var. sandwicensis (A. Gray) A.G. Jones -- not accepted -- annual saltmarsh aster
	Aster tenuifolius var. ramosissimus Torr. & A. Gray -- not accepted
	Aster tephrodes (A. Gray) S.F. Blake -- not accepted
	Aster tortifolius (Torr. & A. Gray) A. Gray non Michx. -- not accepted
	Aster tradescantii var. thyrsoides (A. Gray) B. Boivin -- not accepted
	Aster umbellatus var. latifolius A. Gray -- not accepted
	Aster umbellatus var. pubens A. Gray -- not accepted
	Aster undulatus var. diversifolius (Michx.) A. Gray -- not accepted
	Aster watsonii A. Gray -- not accepted
	Aster wrightii A. Gray -- not accepted
	Aster X herveyi A. Gray (pro sp.) -- not accepted -- Hervey's aster
	Aster xylorhiza (Nutt.) Torr. & A. Gray -- not accepted
	Aster yosemitanus (A. Gray) Greene -- not accepted
	Astilbe japonica (C. Morren & Decne.) A. Gray -- accepted -- florist's spiraea
	Astragalus allochrous A. Gray -- accepted -- halfmoon milkvetch
	Astragalus allochrous var. allochrous A. Gray -- not accepted -- halfmoon milkvetch
	Astragalus amphioxys A. Gray -- accepted -- Crescent milkvetch
	Astragalus amphioxys var. amphioxys A. Gray -- accepted -- Crescent milkvetch
	Astragalus andersonii A. Gray -- accepted -- Anderson's milkvetch
	Astragalus antisellii A. Gray ex W.H. Brewer & S. Watson -- not accepted
	Astragalus aridus A. Gray -- accepted -- annual desert milkvetch
	Astragalus arizonicus A. Gray -- accepted -- Arizona locoweed, Arizona milkvetch
	Astragalus arrectus A. Gray -- accepted -- Palouse milkvetch
	Astragalus arthu-schottii A. Gray -- not accepted
	Astragalus austiniae A. Gray ex W.H. Brewer & S. Watson -- accepted -- Austin's milkvetch
	Astragalus australis var. major (A. Gray) Isely -- not accepted
	Astragalus beckwithii Torr. & A. Gray -- accepted -- Beckwith's milkvetch
	Astragalus beckwithii var. beckwithii Torr. & A. Gray -- accepted -- Beckwith's milkvetch
	Astragalus bicristatus A. Gray -- accepted -- twocrested milkvetch
	Astragalus bigelovii A. Gray -- not accepted
	Astragalus bisulcatus (Hook.) A. Gray -- accepted -- two-groove milkvetch, twogrooved milkvetch
	Astragalus bisulcatus ssp. haydenianus (A. Gray) W.A. Weber -- not accepted
	Astragalus bisulcatus var. bisulcatus (Hook.) A. Gray -- accepted -- two-groove milk-vetch, twogrooved milkvetch
	Astragalus bisulcatus var. haydenianus (A. Gray) Barneby -- accepted -- Hayden milkvetch, Hayden's milkvetch
	Astragalus bolanderi A. Gray -- accepted -- Bolander's milkvetch
	Astragalus bourgovii A. Gray -- accepted -- Bourgov's milkvetch
	Astragalus breweri A. Gray -- accepted -- Brewer's milkvetch
	Astragalus caespitosus (Nutt.) A. Gray -- not accepted
	Astragalus californicus (A. Gray) Greene -- accepted -- Klamath Basin milkvetch
	Astragalus calycosus var. scaposus (A. Gray) M.E. Jones -- accepted -- scapose milkvetch, Torrey milkvetch, Torrey's milkvetch
	Astragalus casei A. Gray -- accepted -- Case's milkvetch
	Astragalus ceramicus var. filifolius (A. Gray) F.J. Herm. -- accepted -- painted milk-vetch, painted milkvetch
	Astragalus chamaeleuce A. Gray -- accepted -- cicada milkvetch
	Astragalus chamaeleuce var. chamaeleuce A. Gray -- not accepted -- cicada milkvetch
	Astragalus cobrensis A. Gray -- accepted -- copper mine milkvetch
	Astragalus cobrensis var. cobrensis A. Gray -- accepted -- copper mine milkvetch
	Astragalus confertiflorus A. Gray -- not accepted
	Astragalus confertiflorus var. confertiflorus A. Gray -- not accepted
	Astragalus cooperi A. Gray -- not accepted
	Astragalus crassicarpus var. trichocalyx (Nutt. ex Torr. & A. Gray) Barneby ex Gleason -- accepted -- groundplum milkvetch, Ozark groundplum
	Astragalus crotalariae (Benth.) A. Gray -- accepted -- rattlebox milkvetch, Salton milkvetch
	Astragalus curtipes A. Gray -- accepted -- Morro milkvetch
	Astragalus cusickii A. Gray -- accepted -- Cusick's milkvetch
	Astragalus cusickii var. cusickii A. Gray -- accepted -- Cusick's milkvetch
	Astragalus cyaneus A. Gray -- accepted -- cyanic milkvetch
	Astragalus decumbens (Nutt. ex Torr. & A. Gray) A. Gray -- not accepted
	Astragalus decumbens var. serotinus (A. Gray ex Cooper) M.E. Jones -- not accepted
	Astragalus didymocarpus var. dispermus (A. Gray) Jeps. -- accepted -- dwarf white milkvetch, Wickenburg milkvetch
	Astragalus diphysus A. Gray -- not accepted
	Astragalus dispermus A. Gray -- not accepted
	Astragalus distortus Torr. & A. Gray -- accepted -- bentpod milkvetch, Ozark milkvetch
	Astragalus distortus var. distortus Torr. & A. Gray -- accepted -- Ozark milkvetch
	Astragalus diversifolius A. Gray -- accepted -- locoweed, meadow milkvetch
	Astragalus douglasii (Torr. & A. Gray) A. Gray -- accepted -- Douglas' milkvetch, Jacumba milkvetch
	Astragalus douglasii var. douglasii (Torr. & A. Gray) A. Gray -- accepted -- Douglas's milkvetch, Jacumba milkvetch
	Astragalus douglasii var. parishii (A. Gray) M.E. Jones -- accepted -- Parish's milkvetch
	Astragalus drepanolobus A. Gray -- not accepted
	Astragalus episcopus var. lancearius (A. Gray) Isely -- not accepted -- Bishop milkvetch, bishop's milkvetch
	Astragalus filipes Torr. ex A. Gray -- accepted -- basalt milkvetch, threadstalk milkvetch
	Astragalus flavus Nutt. ex Torr. & A. Gray -- accepted -- yellow milkvetch
	Astragalus flavus var. candicans A. Gray -- not accepted
	Astragalus flexuosus var. greenei (A. Gray) Barneby -- accepted -- Greene milkvetch, Greene's milkvetch
	Astragalus fremontii A. Gray ex Torr. -- not accepted
	Astragalus frigidus (L.) A. Gray -- accepted
	Astragalus frigidus (L.) A. Gray -- not accepted
	Astragalus geyeri A. Gray -- accepted -- Geyer's milkvetch
	Astragalus geyeri var. geyeri A. Gray -- accepted -- Geyer's milkvetch
	Astragalus geyeri var. triquetrus (A. Gray) M.E. Jones -- accepted -- Geyer milkvetch, Geyer's milkvetch, Muddy River milkvetch, threecorner milkvetch
	Astragalus glabriusculus var. major A. Gray -- not accepted
	Astragalus goniatus Nutt. ex Torr. & A. Gray -- not accepted
	Astragalus greenei A. Gray -- not accepted
	Astragalus hallii A. Gray -- accepted -- Hall milkvetch, Hall's milkvetch
	Astragalus hallii var. hallii A. Gray -- accepted -- Hall milkvetch, Hall's milkvetch
	Astragalus haydenianus A. Gray -- not accepted
	Astragalus hornii A. Gray -- accepted -- Horn's milkvetch
	Astragalus howellii A. Gray -- accepted -- Howell's milkvetch
	Astragalus humillimus A. Gray -- accepted -- Mancos milk-vetch, Mancos milkvetch
	Astragalus humistratus A. Gray -- accepted -- ground-cover milkvetch, groundcover milkvetch
	Astragalus humistratus var. humistratus A. Gray -- accepted -- groundcover milkvetch
	Astragalus humistratus var. sonorae (A. Gray) M.E. Jones -- accepted -- groundcover milkvetch
	Astragalus ineptus A. Gray -- not accepted
	Astragalus kentrophyta A. Gray -- accepted -- spiny milk-vetch, spiny milkvetch
	Astragalus kentrophyta var. kentrophyta A. Gray -- accepted -- spiny milk-vetch, spiny milkvetch
	Astragalus lancearius A. Gray -- accepted -- bishop's milkvetch
	Astragalus lemmonii A. Gray -- accepted -- Lemmon's milkvetch
	Astragalus lentiformis A. Gray -- accepted -- lens pod milkvetch
	Astragalus lentiginosus var. albiflorus (A. Gray) Schoener -- not accepted
	Astragalus lentiginosus var. diphysus (A. Gray) M.E. Jones -- accepted -- double bladder freckled milkvetch, freckled milkvetch, speckledpod milkvetch
	Astragalus lentiginosus var. floribundus A. Gray -- accepted -- Carson City milkvetch, freckled milkvetch, speckledpod milkvetch
	Astragalus lentiginosus var. fremontii (A. Gray ex Torr.) S. Watson -- accepted -- Fremont's milkvetch
	Astragalus lentiginosus var. ineptus (A. Gray) M.E. Jones -- accepted -- freckled milkvetch, homely milkvetch
	Astragalus lentiginosus var. mokiacensis (A. Gray) M.E. Jones -- accepted -- Mokiak milkvetch
	Astragalus lentiginosus var. ursinus (A. Gray) Barneby -- not accepted -- Bear Valley milk-vetch
	Astragalus leptaleus A. Gray -- accepted -- park milkvetch
	Astragalus leptocarpus Torr. & A. Gray -- accepted -- rare loco milkvetch, slimpod milkvetch
	Astragalus leucopsis (Torr. & A. Gray) Torr. -- not accepted
	Astragalus lindheimeri Engelm. ex A. Gray -- accepted -- Lindheimer's milkvetch
	Astragalus lotiflorus var. reverchonii (A. Gray) M.E. Jones -- not accepted
	Astragalus lyallii A. Gray -- accepted -- Lyall's milkvetch
	Astragalus macrodon (Hook. & Arn.) A. Gray -- accepted -- Salinas milkvetch
	Astragalus malacus A. Gray -- accepted -- shaggy milkvetch
	Astragalus megacarpus (Nutt.) A. Gray -- accepted -- bladdery milkvetch, great bladdery milkvetch
	Astragalus megacarpus var. parryi A. Gray ex S. Watson -- not accepted
	Astragalus menziesii A. Gray -- not accepted
	Astragalus menziesii ssp. virgatus (A. Gray ex W.H. Brewer & S. Watson) Abrams -- not accepted
	Astragalus mexicanus var. trichocalyx (Nutt. ex Torr. & A. Gray) Fernald -- not accepted
	Astragalus microcystis A. Gray -- accepted -- dwarf milkvetch
	Astragalus miser var. decumbens (Nutt. ex Torr. & A. Gray) Cronquist -- accepted -- prostrate milkvetch
	Astragalus miser var. serotinus (A. Gray ex Cooper) Barneby -- accepted -- timber milkvetch
	Astragalus mokiacensis A. Gray -- not accepted -- Mokiak milkvetch
	Astragalus mollissimus var. bigelovii (A. Gray) Barneby -- accepted -- Bigelow's milkvetch, Bigelow's woolly locoweed, woolly locoweed
	Astragalus multiflorus (Pursh) A. Gray -- accepted -- looseflower milkvetch
	Astragalus neglectus (Torr. & A. Gray) E. Sheld. -- accepted -- Cooper's milk-vetch, Cooper's milkvetch
	Astragalus nevinii A. Gray -- accepted -- San Clemente Island milk-vetch
	Astragalus newberryi A. Gray -- accepted -- Newberry's milkvetch
	Astragalus newberryi var. newberryi A. Gray -- accepted -- Newberry's milkvetch
	Astragalus nothoxys A. Gray -- accepted -- sheep milkvetch
	Astragalus nuttallianus var. trichocarpus Torr. & A. Gray -- accepted -- hairypod milkvetch, turkey peas, turkeypeas
	Astragalus nuttallii (Torr. & A. Gray) J.T. Howell -- accepted -- Nuttall's milkvetch
	Astragalus nuttallii var. nuttallii (Torr. & A. Gray) J.T. Howell -- accepted -- Nuttall's milkvetch
	Astragalus nuttallii var. virgatus (A. Gray ex W.H. Brewer & S. Watson) Barneby -- accepted -- Nuttall's milkvetch
	Astragalus oocarpus A. Gray -- accepted -- Descanso milk-vetch, egg-pod milkvetch
	Astragalus oxyphysus A. Gray -- accepted -- Mt. Diablo milkvetch
	Astragalus pachycarpus Torr. & A. Gray -- not accepted
	Astragalus palmeri A. Gray -- accepted -- Palmer's milkvetch
	Astragalus parishii A. Gray -- not accepted
	Astragalus parryi A. Gray -- accepted -- Parry's milkvetch
	Astragalus pattersonii A. Gray -- accepted -- Patterson milkvetch, Patterson's milkvetch
	Astragalus platytropis A. Gray -- accepted -- broadkeel milkvetch, broadkeeled milkvetch
	Astragalus preussii A. Gray -- accepted -- Preuss' milkvetch
	Astragalus preussii var. laxiflorus A. Gray -- accepted -- Preuss milkvetch, Preuss' milkvetch
	Astragalus preussii var. preussii A. Gray -- accepted -- Preuss milkvetch, Preuss' milkvetch
	Astragalus pubentissimus Torr. & A. Gray -- accepted -- Green River milkvetch
	Astragalus pubentissimus var. pubentissimus Torr. & A. Gray -- accepted -- Green River milkvetch
	Astragalus pulsiferae A. Gray -- accepted -- Ames' milkvetch
	Astragalus pulsiferae var. pulsiferae A. Gray -- accepted -- Ames' milkvetch
	Astragalus pycnostachyus A. Gray -- accepted -- marsh milkvetch
	Astragalus pycnostachyus var. pycnostachyus A. Gray -- accepted -- marsh milkvetch
	Astragalus rattanii A. Gray -- accepted -- Rattan's milkvetch
	Astragalus rattanii var. rattanii A. Gray -- accepted -- Rattan's milkvetch
	Astragalus reflexus Torr. & A. Gray -- accepted -- drooping milkvetch
	Astragalus reventus A. Gray -- accepted -- Blue Mountain milkvetch
	Astragalus reverchonii A. Gray -- not accepted
	Astragalus robbinsii (Oakes) A. Gray -- accepted -- Robbins' milkvetch
	Astragalus robbinsii var. robbinsii (Oakes) A. Gray -- accepted -- Robbins milk-vetch, Robbins' milkvetch
	Astragalus sabulonum A. Gray -- accepted -- gravel milkvetch
	Astragalus sclerocarpus A. Gray -- accepted -- woodypod milkvetch
	Astragalus sericoleucus A. Gray -- accepted -- silky milkvetch
	Astragalus sericoleucus var. tridactylicus (A. Gray) M.E. Jones -- not accepted
	Astragalus serotinus A. Gray ex Cooper -- not accepted
	Astragalus simplicifolius (Nutt.) A. Gray -- accepted -- little bun milkvetch
	Astragalus spaldingii A. Gray -- accepted -- Spalding's milkvetch
	Astragalus sparsiflorus A. Gray -- accepted -- Front Range milkvetch
	Astragalus sparsiflorus var. majusculus A. Gray -- accepted -- Front Range milkvetch, tium milkvetch
	Astragalus sparsiflorus var. sparsiflorus A. Gray -- accepted -- Front Range milkvetch
	Astragalus speirocarpus A. Gray -- accepted -- threadstalk milkvetch
	Astragalus stenophyllis Torr. & A. Gray -- not accepted
	Astragalus stenophyllus Torr. & A. Gray -- not accepted
	Astragalus stenophyllus var. filipes (Torr. ex A. Gray) Tidestr. -- not accepted
	Astragalus subcinereus A. Gray -- accepted -- Silver's milkvetch
	Astragalus subcinereus var. subcinereus A. Gray -- accepted -- Kaibab Plateau milkvetch
	Astragalus tener A. Gray -- accepted -- alkali milkvetch
	Astragalus tener var. tener A. Gray -- accepted -- alkali milkvetch
	Astragalus tennesseensis A. Gray ex Chapm. -- accepted -- Tennessee milkvetch
	Astragalus tephrodes A. Gray -- accepted -- ashen milkvetch
	Astragalus tephrodes var. brachylobus (A. Gray) Barneby -- accepted -- ashen milkvetch, Prescott milkvetch
	Astragalus tephrodes var. remulcus (A. Gray) Barneby -- accepted -- ashen milkvetch
	Astragalus tephrodes var. tephrodes A. Gray -- accepted -- ashen milkvetch
	Astragalus tetrapterus A. Gray -- accepted -- four-wing milkvetch, fourwing milkvetch
	Astragalus thurberi A. Gray -- accepted -- Thurber's milkvetch
	Astragalus tricarinatus A. Gray -- accepted -- triple-ribbed milkvetch, triplerib milkvetch
	Astragalus trichocalyx Nutt. ex Torr. & A. Gray -- not accepted
	Astragalus trichopodus (Nutt.) A. Gray -- accepted -- Santa Barbara milkvetch
	Astragalus trichopodus ssp. antisellii (A. Gray ex W.H. Brewer & S. Watson) Thorne -- not accepted
	Astragalus trichopodus ssp. leucopsis (Torr. & A. Gray) Thorne -- not accepted
	Astragalus trichopodus var. antisellii (A. Gray ex W.H. Brewer & S. Watson) Jeps. -- accepted -- Antisell's milkvetch, Santa Barbara milkvetch
	Astragalus trichopodus var. trichopodus (Nutt.) A. Gray -- accepted -- Santa Barbara milkvetch
	Astragalus tridactylicus A. Gray -- accepted -- foothill milkvetch
	Astragalus triquetrus A. Gray -- not accepted
	Astragalus utahensis (Torr.) Torr. & A. Gray -- accepted -- Utah locoweed, Utah milkvetch
	Astragalus vaccarum A. Gray -- accepted -- Cow Spring milkvetch
	Astragalus viridis (Nutt. ex Torr. & A. Gray) E. Sheld. -- not accepted
	Astragalus wardii A. Gray -- accepted -- Ward's milkvetch
	Astragalus webberi A. Gray ex W.H. Brewer & S. Watson -- accepted -- Webber's milk-vetch
	Astragalus whitneyi A. Gray -- accepted -- balloon milkvetch, balloonpod milkvetch
	Astragalus whitneyi ssp. hookerianus (Torr. & A. Gray) Abrams -- not accepted
	Astragalus whitneyi var. whitneyi A. Gray -- accepted -- balloonpod milkvetch, Whitney's milkvetch
	Astragalus wrightii A. Gray -- accepted -- Wright's milkvetch
	Astrichoseris A. Gray -- not accepted
	Astrichoseris platyphylla A. Gray -- not accepted
	Astronidium A. Gray -- accepted
	Astronidium pickeringii (A. Gray) Christoph. -- accepted
	Atrichoseris A. Gray -- accepted -- atrichoseris
	Atrichoseris platyphylla (A. Gray) A. Gray -- accepted -- gravel ghost, parachute plant, parachute-plant
	Atriplex brandegeei (A. Gray) Collotzi ex W.A. Weber -- not accepted
	Atriplex patula var. hastata auct. non (L.) A. Gray -- not accepted
	Atriplex patula var. littoralis (L.) A. Gray -- not accepted
	Atriplex truncata (Torr. ex S. Watson) A. Gray -- accepted -- wedgescale saltbush
	Atropis californica Munro ex A. Gray -- not accepted
	Avena smithii Porter ex A. Gray -- not accepted
	Ayenia microphylla A. Gray -- accepted -- dense ayenia, little-leaf ayenia, shrubby ayenia
	Azalea californica Torr. & A. Gray ex Durand -- not accepted
	Azalea japonica A. Gray -- not accepted
	Azalea occidentalis Torr. & A. Gray ex Torr. -- not accepted
	Azalea vaseyi (A. Gray) Rehder -- not accepted
	Baccharis bigelovii A. Gray -- accepted -- Bigelow baccharis, Bigelow's false willow, Bigelow's falsewillow
	Baccharis brachyphylla A. Gray -- accepted -- shortleaf baccharis
	Baccharis emoryi A. Gray -- not accepted -- Emory's baccharis
	Baccharis havardii A. Gray -- accepted -- Havard's false willow, Havard's falsewillow
	Baccharis plummerae A. Gray -- accepted -- Plummer's baccharis
	Baccharis plummerae ssp. plummerae A. Gray -- accepted -- Plummer's baccharis
	Baccharis salicina Torr. & A. Gray -- accepted -- Emory's baccharis, Great Plains false willow, Great Plains falsewillow, willow baccharis
	Baccharis sarothroides A. Gray -- accepted -- broom baccharis, desert broom, desertbroom
	Baccharis sergiloides A. Gray -- accepted -- desert baccharis, squaw waterweed baccharis
	Baccharis texana (Torr. & A. Gray) A. Gray -- accepted -- prairie baccharis, prairie false willow, prairie falsewillow
	Baccharis wrightii A. Gray -- accepted -- Wright's baccharis
	Baeothryon clintonii (A. Gray) �. L�ve & D. L�ve -- not accepted
	Baeria debilis Greene ex A. Gray -- not accepted
	Baeria fremontii (Torr. ex A. Gray) A. Gray -- not accepted
	Baeria leptalea (A. Gray) A. Gray -- not accepted
	Baeria macrantha (A. Gray) A. Gray -- not accepted
	Baeria macrantha var. pauciaristata A. Gray -- not accepted
	Baeria maritima A. Gray -- not accepted
	Baeria minor ssp. maritima (A. Gray) Ferris -- not accepted
	Baeria platycarpha (A. Gray) A. Gray -- not accepted
	Baeria uliginosa (Nutt.) A. Gray -- not accepted
	Bahia absinthifolia var. dealbata (A. Gray) A. Gray -- not accepted -- Dealbata's bahia
	Bahia bigelovii A. Gray -- accepted -- Bigelow's bahia
	Bahia biternata A. Gray -- accepted -- slim-lobe false goldfields, slimlobe bahia
	Bahia dissecta (A. Gray) Britton -- not accepted -- ragleaf bahia
	Bahia neomexicana (A. Gray) A. Gray -- not accepted
	Bahia nudicaulis A. Gray -- not accepted
	Bahia nudicaulis var. oblongifolia (A. Gray) Cronquist -- not accepted
	Bahia oblongifolia (A. Gray) A. Gray -- not accepted
	Bahia oppositifolia (Nutt.) A. Gray -- not accepted
	Bahia pedata A. Gray -- accepted -- blunt-scale false goldfields, bluntscale bahia
	Bahia wallacei A. Gray -- not accepted
	Bahia woodhousei (A. Gray) A. Gray -- not accepted
	Bahiopsis laciniata (A. Gray) E.E. Schill. & Panero -- accepted -- torhleaf goldeneye
	Baileya Harv. & A. Gray ex A. Gray -- accepted -- baileya, desert marigold
	Baileya multiradiata Harv. & A. Gray ex A. Gray -- accepted -- desert baileya, desert marigold
	Baileya multiradiata var. pleniradiata (Harv. & A. Gray ex A. Gray) Coville -- not accepted
	Baileya pauciradiata Harv. & A. Gray ex A. Gray -- accepted -- laxflower
	Baileya pleniradiata Harv. & A. Gray ex A. Gray -- accepted -- desertmarigold baileya, woolly desert marigold, woolly desert-marigold
	Balsamorhiza bolanderi A. Gray -- not accepted
	Balsamorhiza careyana A. Gray -- accepted -- Carey's balsamroot, intermediate balsamroot
	Balsamorhiza careyana var. careyana A. Gray -- not accepted -- Carey's balsamroot
	Baptisia bracteata var. laevicaulis (A. Gray ex Canby) Isely -- not accepted -- longbract wild indigo
	Baptisia laevicaulis (A. Gray ex Canby) Small -- not accepted
	Baptisia lecontei Torr. & A. Gray -- accepted -- pineland wild indigo
	Baptisia leucantha Torr. & A. Gray -- not accepted
	Baptisia leucophaea var. laevicaulis A. Gray ex Canby -- not accepted
	Baptisia megacarpa Chapm. ex Torr. & A. Gray -- accepted -- Apalachicola wild indigo
	Barringtonia samoensis A. Gray -- accepted
	Bartlettia A. Gray -- accepted -- bartlettia
	Bartlettia scaposa A. Gray -- accepted -- Bartlett daisy
	Bauhinia lunarioides A. Gray ex S. Watson -- accepted -- Texasplume
	Beckmannia eruciformis var. uniflora Scribn. ex A. Gray -- not accepted
	Beckmannia syzigachne var. uniflora (Scribn. ex A. Gray) B. Boivin -- not accepted
	Beckwithia andersonii (A. Gray) Jeps. -- not accepted
	Benthamantha edwardsii var. glabella (A. Gray) Wiggins -- not accepted
	Benthamantha glabella (A. Gray) Rydb. -- not accepted
	Berberis fendleri A. Gray -- accepted -- Colorado barberry
	Berberis nevinii A. Gray -- accepted -- Nevin's barberry
	Berlandiera dealbata (Torr. & A. Gray) Small -- not accepted
	Berlandiera incisa Torr. & A. Gray -- not accepted
	Berlandiera lyrata var. macrophylla A. Gray -- not accepted
	Berlandiera texana var. bentonicifolia (Hook.) Torr. & A. Gray -- not accepted
	Berlandiera texana var. betonicifolia (Hook.) Torr. & A. Gray -- not accepted
	Berlandiera tomentosa var. dealbata Torr. & A. Gray -- not accepted
	Berlandiera X macrophylla (A. Gray) M.E. Jones -- accepted
	Besseya alpina (A. Gray) Rydb. -- not accepted -- alpine besseya
	Bidens aristosa var. mutica (A. Gray) Gattinger -- not accepted
	Bidens aurea var. wrightii (A. Gray) Sherff -- not accepted
	Bidens bigelovii A. Gray -- accepted -- Bigelow beggarticks, Bigelow's beggarticks, stickseed
	Bidens bigelovii var. bigelovii A. Gray -- not accepted
	Bidens cernua var. elata Torr. & A. Gray -- not accepted
	Bidens comosa (A. Gray) Wiegand -- not accepted
	Bidens coronata var. tenuiloba (A. Gray) Sherff -- not accepted
	Bidens cosmoides (A. Gray) Sherff -- accepted -- cosmosflower beggarticks
	Bidens discoidea (Torr. & A. Gray) Britton -- accepted -- discoid beggarticks, small beggarticks, swamp beggar-ticks
	Bidens elata (Torr. & A. Gray) Sherff -- not accepted
	Bidens hawaiensis A. Gray -- accepted -- Hawai'i beggarticks
	Bidens heterosperma A. Gray -- accepted -- Rocky Mountain beggarticks
	Bidens lemmonii A. Gray -- accepted -- Lemmon's beggarticks
	Bidens macrocarpa (A. Gray) Sherff -- accepted -- largefruit beggarticks
	Bidens macrocarpa var. ovatifolia (A. Gray) Sherff -- not accepted
	Bidens mauiensis (A. Gray) Sherff -- accepted -- Maui beggarticks
	Bidens menziesii (A. Gray) Sherff -- accepted -- Mauna Loa beggarticks
	Bidens menziesii ssp. menziesii (A. Gray) Sherff -- accepted -- Mauna Loa beggarticks
	Bidens tenuisecta A. Gray -- accepted -- slim-lobe beggarticks, slimlobe beggarticks
	Bigelovia brachylepis A. Gray -- not accepted
	Bigelovia intricata A. Gray -- not accepted
	Bigelovia vaseyi A. Gray -- not accepted
	Bilderdykia cristata (Engelm. & A. Gray) Greene -- not accepted
	Bilderdykia scandens var. cristata (Engelm. & A. Gray) C.F. Reed -- not accepted
	Biltia vaseyi (A. Gray) Small -- not accepted
	Blephariglotis peramoena (A. Gray) Rydb. -- not accepted
	Blephariglottis peramoena (A. Gray) Rydb. -- not accepted
	Blepharipappus scaber ssp. laevis (A. Gray) D.D. Keck -- not accepted -- rough eyelashweed
	Bobea brevipes A. Gray -- accepted -- `akupa
	Bobea elatior var. brevipes (A. Gray) Hillebr. -- not accepted
	Bobea sandwicensis (A. Gray) Hillebr. -- accepted -- 'ahakea, Hawai'i dogweed
	Boechera brachycarpa (Torr. & A. Gray) Dorn -- not accepted
	Boechera drummondii (A. Gray) �. L�ve & D. L�ve -- not accepted
	Boechera platysperma (A. Gray) Al-Shehbaz -- accepted -- pioneer rockcress
	Boerhavia eriosolena A. Gray -- not accepted
	Boerhavia linearifolia A. Gray -- accepted -- narrowleaf spiderling
	Boerhavia purpurascens A. Gray -- accepted -- purple spiderling
	Boerhavia wrightii A. Gray -- accepted -- large-bract spiderling, largebract spiderling, Wright's boerhavia
	Boisduvalia densiflora var. salicina (Nutt. ex Torr. & A. Gray) Munz -- not accepted
	Boisduvalia salicina (Nutt. ex Torr. & A. Gray) Rydb. -- not accepted
	Boisduvalia stricta (A. Gray) Greene -- not accepted
	Bolandra A. Gray -- accepted -- false coolwort
	Bolandra californica A. Gray -- accepted -- Sierra false coolwort
	Boltonia asteroides var. decurrens (Torr. & A. Gray) Fernald -- not accepted
	Boltonia asteroides var. latisquama (A. Gray) Cronquist -- accepted -- white doll's daisy, white doll's-daisy
	Boltonia decurrens (Torr. & A. Gray) Alph. Wood -- accepted -- claspingleaf doll's daisy, decurrent false aster
	Boltonia latisquama A. Gray -- not accepted
	Boltonia latisquama var. decurrens (Torr. & A. Gray) Fernald & Grisc. -- not accepted
	Boltonia latisquama var. occidentalis A. Gray -- not accepted
	Bombycilaena californica var. subvestita (A. Gray) Kartesz -- not accepted
	Bonamia aquatica (Walter) A. Gray -- not accepted
	Bonamia grandiflora (A. Gray) Hallier f. -- accepted -- Florida bonamia, Florida lady's nightcap
	Bonamia humistrata (Walter) A. Gray -- not accepted
	Bonamia menziesii A. Gray -- accepted -- Hawaii lady's nightcap
	Bonamia pickeringii (Torr. ex M.A. Curtis) A. Gray -- not accepted
	Boschniakia strobilacea A. Gray -- not accepted -- California groundcone
	Bouchea linifolia A. Gray -- accepted -- groovestem bouchea
	Bouteloua curtipendula var. aristosa A. Gray -- not accepted
	Bouteloua oligostachya (Nutt.) Torr. ex A. Gray -- not accepted
	Bouteloua racemosa var. aristosa (A. Gray) S. Watson & J.M. Coult. -- not accepted
	Boykinia major A. Gray -- accepted -- large boykinia
	Boykinia occidentalis Torr. & A. Gray -- accepted -- coast boykinia, coastal brookfoam
	Boykinia ranunculifolia (Hook.) A. Gray -- not accepted
	Boykinia rotundifolia Parry ex A. Gray -- accepted -- roundleaf brookfoam
	Brachyactis frondosa (Nutt.) A. Gray -- not accepted -- leafy rayless aster
	Brachyelytrum aristatum var. engelmannii A. Gray -- not accepted
	Brachystigma wrightii (A. Gray) Pennell -- accepted -- Arizona desert foxglove, Wright's brachystigma
	Bradburia hirtella Torr. & A. Gray -- accepted -- Texas chrysopsis
	Brazoria Engelm. & A. Gray -- accepted -- brazos-mint, brazosmint
	Brazoria scutellarioides Engelm. & A. Gray -- not accepted -- prairie brazosmint
	Brazoria truncata (Benth.) Engelm. & A. Gray -- accepted -- rattlesnake flower
	Brazoria truncata var. truncata (Benth.) Engelm. & A. Gray -- accepted -- rattlesnake flower
	Breweria aquatica (Walter) A. Gray -- not accepted
	Breweria humistrata (Walter) A. Gray -- not accepted
	Breweria ovalifolia (Torr.) A. Gray -- not accepted
	Breweria pickeringii (Torr. ex M.A. Curtis) A. Gray -- not accepted
	Brickellia amplexicaulis var. lanceolata (A. Gray) B.L. Rob. -- not accepted -- earleaf brickellbush
	Brickellia atractyloides A. Gray -- accepted -- hollyleaf brickellbush, spearleaf brickellbush
	Brickellia atractyloides var. atractyloides A. Gray -- accepted -- spearleaf brickellia
	Brickellia baccharidea A. Gray -- accepted -- baccharis-leaf brickellia, baccharisleaf brickellbush, resinleaf brickellbush
	Brickellia betonicifolia A. Gray -- accepted -- betonyleaf brickellbush
	Brickellia brachiata A. Gray -- not accepted
	Brickellia brachyphylla (A. Gray) A. Gray -- accepted -- Brach brickellbush, plumed brickellbush
	Brickellia brachyphylla var. brachyphylla (A. Gray) A. Gray -- not accepted -- plumed brickellbush
	Brickellia californica (Torr. & A. Gray) A. Gray -- accepted -- California brickellbush, Jepson's brickellbush
	Brickellia californica var. californica (Torr. & A. Gray) A. Gray -- not accepted -- California brickellbush
	Brickellia coulteri A. Gray -- accepted -- Coulter's brickellbush
	Brickellia coulteri var. brachiata (A. Gray) B.L. Turner -- accepted
	Brickellia coulteri var. coulteri A. Gray -- accepted -- Coulter's brickellbush
	Brickellia cylindracea A. Gray & Engelm. -- accepted -- gravelbar brickellbush
	Brickellia diffusa (Vahl) A. Gray -- accepted
	Brickellia eupatorioides var. corymbulosa (Torr. & A. Gray) Shinners -- accepted -- false boneset
	Brickellia eupatorioides var. gracillima (A. Gray) B.L. Turner -- accepted -- false boneset
	Brickellia fendleri A. Gray -- not accepted -- Fendler's brickellbush
	Brickellia floribunda A. Gray -- accepted -- Chihuahuan brickellbush, desert brickellbush
	Brickellia frutescens A. Gray -- accepted -- rigid brickellbush, shrubby brickellbush
	Brickellia grandiflora var. petiolaris A. Gray -- not accepted
	Brickellia greenei A. Gray -- accepted -- Greene's brickellbush
	Brickellia incana A. Gray -- accepted -- white brickellbush, woolly brickellbush
	Brickellia laciniata A. Gray -- accepted -- splitleaf brickellbush
	Brickellia lemmonii A. Gray -- accepted -- Lemmon's brickellbush
	Brickellia lemmonii var. lemmonii A. Gray -- accepted -- Lemmon's brickellbush
	Brickellia microphylla (Nutt.) A. Gray -- accepted -- littleleaf brickellbush
	Brickellia microphylla ssp. scabra (A. Gray) W.A. Weber -- not accepted
	Brickellia microphylla var. microphylla (Nutt.) A. Gray -- accepted -- littleleaf brickellbush, Watson's brickellbush
	Brickellia microphylla var. scabra A. Gray -- accepted -- rough brickellbush
	Brickellia nevinii A. Gray -- accepted -- Nevin's brickellbush
	Brickellia parvula A. Gray -- accepted -- Mt. Davis brickellbush, small brickellbush, small brickellia
	Brickellia pringlei A. Gray -- accepted -- Pringle's brickellbush
	Brickellia rusbyi A. Gray -- accepted -- stinking brickellbush
	Brickellia scabra (A. Gray) A. Nelson ex B.L. Rob. -- not accepted
	Brickellia shaffneri (A. Gray) Shinners -- not accepted
	Brickellia simplex A. Gray -- accepted -- Sonoran brickellbush
	Brickellia squamulosa A. Gray -- not accepted -- Mule Mountain brickellbush
	Brickellia veronicifolia (Kunth) A. Gray -- accepted -- veronicaleaf brickellbush
	Brickellia veronicifolia var. veronicifolia (Kunth) A. Gray -- not accepted -- veronicaleaf brickellbush
	Brickelliastrum fendleri (A. Gray) King & H. Rob. -- accepted -- Fendler's brickellbush
	Brighamia A. Gray -- accepted
	Brighamia insignis A. Gray -- accepted -- `olulu, cabbage on a stick
	Brizopyrum spicatum var. strictum (Torr.) A. Gray ex S. Watson -- not accepted
	Bromelica smithii (Porter ex A. Gray) Farw. -- not accepted
	Bromopsis kalmii (A. Gray) Holub -- not accepted
	Bromus ciliatus var. purgans (L.) A. Gray -- not accepted
	Bromus kalmii A. Gray -- accepted -- arctic brome, brome de Kalm, Kalm's brome, wild chess
	Bromus muticus Nutt. ex A. Gray -- not accepted
	Bromus nitens Nutt. ex A. Gray -- not accepted
	Bromus parviflorus Nutt. ex A. Gray -- not accepted
	Bryanthus breweri A. Gray -- not accepted
	Bryonia boykinii Torr. & A. Gray -- not accepted
	Buchnera arizonica (A. Gray) Pennell -- not accepted -- Arizona bluehearts
	Bumelia lanuginosa ssp. rigida (A. Gray) Cronquist -- not accepted
	Bumelia lanuginosa var. rigida A. Gray -- not accepted
	Bumelia rigida (A. Gray) Small -- not accepted
	Bursera microphylla A. Gray -- accepted -- elephant tree, littleleaf elephant tree
	Cabomba caroliniana A. Gray -- accepted -- Carolina fanwort, fanwort
	Cabomba caroliniana var. caroliniana A. Gray -- not accepted -- Carolina fanwort, fanwort
	Cacalia decomposita A. Gray -- not accepted
	Cacalia diversifolia Torr. & A. Gray -- not accepted
	Cacalia floridana A. Gray -- not accepted
	Cacalia nardosmia A. Gray -- not accepted
	Cacalia rugelia (A. Gray) T.M. Barkley & Cronquist -- not accepted
	Cacaliopsis A. Gray -- accepted -- cacaliopsis
	Cacaliopsis nardosmia (A. Gray) A. Gray -- accepted -- silvercrown
	Caesalpinia brachycarpa (A. Gray) Fisher -- not accepted -- broad-pod rushpea, broadpod nicker
	Caesalpinia caudata (A. Gray) Fisher -- accepted -- tailed nicker
	Caesalpinia drepanocarpa (A. Gray) Fisher -- not accepted -- sickle-pod holdback, sicklepod holdback, sicklepod rushpea
	Caesalpinia drummondii (Torr. & A. Gray) Fisher -- not accepted -- dwarf nicker
	Caesalpinia jamesii (Torr. & A. Gray) Fisher -- not accepted -- James' holdback, James' rushpea
	Caesalpinia mexicana A. Gray -- not accepted -- Mexican holdback, Mexican poinciana
	Calamagrostis albescens Buckley ex A. Gray -- not accepted
	Calamagrostis breviseta (A. Gray) Scribn. -- not accepted
	Calamagrostis columbiensis Nutt. ex A. Gray -- not accepted
	Calamagrostis inexpansa A. Gray -- not accepted
	Calamagrostis inexpansa var. inexpansa A. Gray -- not accepted
	Calamagrostis neglecta ssp. inexpansa (A. Gray) Tzvelev -- not accepted
	Calamagrostis neglecta var. inexpansa (A. Gray) M.E. Jones -- not accepted
	Calamagrostis pallida Nutt. ex A. Gray -- not accepted
	Calamagrostis pickeringii A. Gray -- accepted -- Pickering's reedgrass
	Calamagrostis pickeringii f. pickeringii A. Gray -- accepted
	Calamagrostis pickeringii var. pickeringii A. Gray -- not accepted
	Calamagrostis porteri A. Gray -- accepted -- Porter's reedgrass
	Calamagrostis porteri ssp. porteri A. Gray -- accepted -- Porter's reedgrass
	Calamagrostis stricta ssp. inexpansa (A. Gray) C.W. Greene -- accepted -- northern reedgrass, slim-stem reed grass
	Calamagrostis sylvatica var. breviseta A. Gray -- not accepted
	Calamintha canescens Torr. & A. Gray ex Benth. -- not accepted
	Calamintha ilicifolia A. Gray -- not accepted
	Calamovilfa (A. Gray) Hack. ex Scribn. & Southw. -- accepted -- sandreed
	Calandrinia tweedyi A. Gray -- not accepted
	Calliandra herbacea Engelm. ex A. Gray -- not accepted
	Calliandra humilis var. reticulata (A. Gray) L.D. Benson -- accepted -- dwarf stickpea
	Calliandra reticulata A. Gray -- not accepted
	Callirhoe alcaeoides (Michx.) A. Gray -- accepted -- light poppymallow, pale poppy mallow, plains poppymallow, plains wine cup
	Callirhoe involucrata (Torr. & A. Gray) A. Gray -- accepted -- low poppymallow, purple poppy mallow, purple poppymallow, winecup
	Callirhoe involucrata var. involucrata (Torr. & A. Gray) A. Gray -- accepted -- buffalo rose, low poppy mallow, purple poppy mallow, purple poppymallow
	Callirhoe involucrata var. lineariloba (Torr. & A. Gray) A. Gray -- accepted -- cowboy rose, purple poppymallow
	Callirhoe papaver (Cav.) A. Gray -- accepted -- woodland poppymallow, woods poppymallow
	Callirhoe pedata (Nutt. ex Hook.) A. Gray -- accepted -- palmleaf poppymallow
	Callirhoe triangulata (Leavenw.) A. Gray -- accepted -- clustered poppy mallow, clustered poppymallow, sand poppy, triangular-leaf mallow
	Calochortus nuttallii Torr. & A. Gray -- accepted -- sego lily, sego-lily
	Calophanes angusta A. Gray -- not accepted
	Calophanes decumbens A. Gray -- not accepted
	Calophanes linearis (Torr. & A. Gray) A. Gray -- not accepted
	Caltha palustris var. flabellifolia (Pursh) Torr. & A. Gray -- not accepted
	Calycadenia fremontii A. Gray -- accepted -- Fremont's western rosinweed
	Calycadenia mollis A. Gray -- accepted -- soft western rosinweed
	Calycadenia pauciflora A. Gray -- accepted -- smallflower western rosinweed
	Calycadenia tenella (Nutt.) Torr. & A. Gray -- not accepted
	Calycanthus floridus var. glaucus (Willd.) Torr. & A. Gray -- accepted -- eastern sweetshrub
	Calycanthus floridus var. laevigatus (Willd.) Torr. & A. Gray -- not accepted
	Calycocarpum lyonii (Pursh) A. Gray -- accepted -- cupseed
	Calycoseris A. Gray -- accepted -- tackstem
	Calycoseris parryi A. Gray -- accepted -- yellow tackstem
	Calycoseris wrightii A. Gray -- accepted -- white tackstem
	Calylophus berlandieri ssp. pinifolius (Engelm. ex A. Gray) Towner -- not accepted -- Berlandier's sundrops
	Calylophus hartwegii ssp. fendleri (A. Gray) Towner & P.H. Raven -- not accepted -- Fendler calylophus, Hartweg's sundrops
	Calylophus hartwegii ssp. lavandulifolius (Torr. & A. Gray) Towner & P.H. Raven -- not accepted
	Calylophus hartwegii ssp. pubescens (A. Gray) Towner & P.H. Raven -- not accepted -- hairy calylophus, Hartweg's sundrops
	Calylophus hartwegii var. lavandulifolius (Torr. & A. Gray) Shinners -- not accepted
	Calylophus hartwegii var. pubescens (A. Gray) Shinners -- not accepted
	Calylophus lavandulifolius (Torr. & A. Gray) P.H. Raven -- not accepted -- lavender calylophus, lavender sundrop, lavenderleaf eveningprimrose, lavenderleaf sundrops
	Calylophus serrulatus var. spinulosus (Nutt. ex Torr. & A. Gray) Shinners -- not accepted
	Calylophus tubicula (A. Gray) P.H. Raven -- not accepted -- Texas sundrops
	Calymmandra candida Torr. & A. Gray -- not accepted
	Calyptridium parryi A. Gray -- not accepted
	Calyptridium parryi var. parryi A. Gray -- not accepted -- pussypaws
	Calyptridium umbellatum var. caudiciferum (A. Gray) Jeps. -- not accepted
	Calystegia fulcrata (A. Gray) Brummitt -- not accepted
	Calystegia occidentalis (A. Gray) Brummitt -- accepted -- chaparral false bindweed
	Calystegia occidentalis ssp. fulcrata (A. Gray) Brummitt -- accepted -- chaparral false bindweed
	Calystegia occidentalis ssp. occidentalis (A. Gray) Brummitt -- accepted -- chaparral false bindweed
	Calystegia occidentalis ssp. occidentalis var. occidentalis (A. Gray) Brummitt -- not accepted -- chaparral false bindweed
	Calystegia occidentalis var. occidentalis (A. Gray) Brummitt -- accepted -- chaparral false bindweed
	Calystegia sepium var. pubescens A. Gray -- not accepted
	Calystegia sepium var. repens (L.) A. Gray -- not accepted
	Calystegia spithamaea var. pubescens (A. Gray) C.F. Reed -- not accepted
	Calytophus berlandieri var. pinifolius (Engelm. ex A. Gray) Towner -- not accepted
	Calytophus hartwegii var. fendleri (A. Gray) Towner & P.H. Raven -- not accepted
	Calytophus hartwegii var. pubescens (A. Gray) Towner & P.H. Raven -- not accepted
	Calytophus lavandulifolius (Torr. & A. Gray) P.H. Raven -- not accepted
	Calytophus tubicula (A. Gray) P.H. Raven -- not accepted
	Camassia angusta (Engelm. & A. Gray) Blank. -- accepted -- prairie camas
	Camissonia bistorta (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- southern suncup
	Camissonia breviflora (Torr. & A. Gray) P.H. Raven -- not accepted -- fewflower evening primrose, fewflower evening-primrose, shortflower suncup
	Camissonia brevipes (A. Gray) P.H. Raven -- not accepted -- golden suncup, yellow cups
	Camissonia brevipes ssp. brevipes (A. Gray) P.H. Raven -- not accepted -- golden suncup
	Camissonia californica (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- California primrose, California suncup
	Camissonia chamaenerioides (A. Gray) P.H. Raven -- not accepted -- long-capsule suncup, longcapsule suncup, willowherb suncup
	Camissonia ovata (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- goldeneggs
	Camissonia parvula (Nutt. ex Torr. & A. Gray) P.H. Raven -- accepted -- Lewis River suncup
	Camissonia scapoidea (Torr. & A. Gray) P.H. Raven -- not accepted -- barestem eveningprimrose, Paiute suncup, scapoid suncup
	Camissonia scapoidea ssp. scapoidea (Torr. & A. Gray) P.H. Raven -- not accepted -- Paiute suncup, Seorsa evening primrose, Seorsa eveningprimrose
	Camissonia tanacetifolia (Torr. & A. Gray) P.H. Raven -- not accepted -- tansyleaf evening primrose, tansyleaf evening-primrose, tansyleaf suncup
	Camissonia tanacetifolia ssp. tanacetifolia (Torr. & A. Gray) P.H. Raven -- not accepted -- tansyleaf evening primrose, tansyleaf evening-primrose, tansyleaf suncup
	Camissoniopsis bistorta (Nutt. ex Torr. & A. Gray) W.L. Wagner & Hoch -- accepted -- southern suncup
	Campanula alaskana (A. Gray) W. Wight ex J.P. Anderson -- accepted
	Campanula floridana S. Watson ex A. Gray -- accepted -- Florida bellflower
	Campanula parryi A. Gray -- accepted -- Parry's bellflower, Parry's harebell
	Campanula parryi var. parryi A. Gray -- accepted -- Parry's bellflower
	Campanula reverchonii A. Gray -- accepted -- basin bellflower
	Campanula rotundifolia var. alaskana A. Gray -- not accepted
	Canavalia sericea A. Gray -- accepted -- silky jackbean
	Canbya Parry ex A. Gray -- accepted -- pygmypoppy
	Canbya candida Parry ex A. Gray -- accepted -- white pygmypoppy
	Capnoides micranthum (Engelm. ex A. Gray) Britton -- not accepted
	Cardamine clematitis Shuttlw. ex A. Gray -- accepted -- mountain bittercress, small mountain bittercress
	Cardamine cordifolia A. Gray -- accepted -- heartleaf bittercress, large mountain bittercress
	Cardamine cordifolia var. cordifolia A. Gray -- not accepted -- heartleaf bittercress
	Cardamine cordifolia var. incana A. Gray ex M.E. Jones -- not accepted -- heartleaf bittercress
	Carduus americanus (A. Gray) Rydb. -- not accepted
	Carduus lecontei (Torr. & A. Gray) Pollard -- not accepted
	Carex aestivalis M.A. Curtis ex A. Gray -- accepted -- summer sedge
	Carex debilis ssp. pubera (A. Gray) �. L�ve & D. L�ve -- not accepted
	Carex debilis var. pubera A. Gray -- not accepted -- white edge sedge
	Carex emmonsii var. muehlenbergii (A. Gray) Rettig -- not accepted
	Carex emmonsii var. muhlenbergii (A. Gray) Rettig -- not accepted
	Carex grayi var. hispidula A. Gray -- not accepted
	Carex lupulina var. pedunculata A. Gray -- not accepted
	Carex nigromarginata var. muehlenbergii (A. Gray) Gleason -- not accepted
	Carex nigromarginata var. muhlenbergii (A. Gray) Gleason -- not accepted
	Carlowrightia A. Gray -- accepted -- wrightwort
	Carlowrightia arizonica A. Gray -- accepted -- Arizona carlowrightia, Arizona wrightwort
	Carlowrightia linearifolia (Torr.) A. Gray -- accepted -- heath wrightwort
	Carlowrightia pubens A. Gray -- not accepted
	Carlowrightia serpyllifolia A. Gray -- accepted -- Trans-Pecos wrightwort
	Carlquistia muirii (A. Gray) B.G. Baldw. -- accepted -- Muir's raillardiopsis
	Carphephorus bellidifolius (Michx.) Torr. & A. Gray -- accepted -- sandywoods chaffhead
	Carphephorus corymbosus (Nutt.) Torr. & A. Gray -- accepted -- coastal plain chaffhead, coastalplain chaffhead
	Carphephorus tomentosus (Michx.) Torr. & A. Gray -- accepted -- woolly chaffhead
	Carphochaete A. Gray -- accepted -- bristlehead
	Carphochaete bigelovii A. Gray -- accepted -- Bigelow bush, Bigelow's bristlehead
	Carum gairdneri (Hook. & Arn.) A. Gray -- not accepted
	Cassandra calyculata var. angustifolia (Aiton) A. Gray -- not accepted
	Cassia bauhinioides A. Gray -- not accepted
	Cassia covesii A. Gray -- not accepted
	Cassia greggii A. Gray -- not accepted
	Cassia pumilio A. Gray -- not accepted
	Cassia wislizeni A. Gray -- not accepted
	Cassia wrightii A. Gray -- not accepted
	Castela emoryi (A. Gray) Moran & Felger -- accepted -- crucifixion thorn, crucifixion-thorn
	Castela erecta ssp. texana (Torr. & A. Gray) Cronquist -- not accepted -- allthorn goatbush, Texan goatbush
	Castela texana (Torr. & A. Gray) Rose -- accepted
	Castilleja attenuata (A. Gray) T.I. Chuang & Heckard -- accepted -- attenuate Indian paintbrush, Indian paintbrush
	Castilleja cinerea A. Gray -- accepted -- ash-gray Indian paintbrush
	Castilleja haydenii (A. Gray) Cockerell -- accepted -- Hayden's Indian paintbrush
	Castilleja integra A. Gray -- accepted -- squawfeather, wholeleaf Indian paintbrush
	Castilleja integra var. integra A. Gray -- accepted -- wholeleaf Indian paintbrush
	Castilleja lanata A. Gray -- accepted -- Sierra woolly Indian paintbrush, Sierran woolly Indian paintbrush, woolly paintbrush
	Castilleja lanata ssp. lanata A. Gray -- accepted -- Sierra woolly Indian paintbrush
	Castilleja lasiorhyncha (A. Gray) T.I. Chuang & Heckard -- accepted -- San Bernardino Mountains Indian paintbrush, San Bernardino Mountains orthocarpus
	Castilleja laxa A. Gray -- not accepted
	Castilleja lemmonii A. Gray -- accepted -- Lemmon's Indian paintbrush, Lemmon's paintbrush
	Castilleja linoides A. Gray -- not accepted
	Castilleja mexicana (Hemsl.) A. Gray -- not accepted
	Castilleja mexicana (Hemsl.) A. Gray -- accepted -- Mexican Indian paintbrush
	Castilleja minor (A. Gray) A. Gray -- accepted -- alkali Indian paintbrush, lesser Indian paintbrush
	Castilleja minor ssp. minor (A. Gray) A. Gray -- accepted -- lesser Indian paintbrush, small annual Indian paintbrush, small Indian paintbrush, smallflower paintbrush
	Castilleja oblongifolia A. Gray -- not accepted
	Castilleja pallescens (A. Gray) Greenm. -- accepted -- pale Indian paintbrush, pale paintbrush
	Castilleja pallescens var. pallescens (A. Gray) Greenm. -- accepted -- pale Indian paintbrush
	Castilleja pallida var. septentrionalis (Lindl.) A. Gray -- not accepted
	Castilleja plagiotoma A. Gray -- accepted -- Mojave Indian paintbrush
	Castilleja purpurea var. lindheimeri (A. Gray) Shinners -- accepted -- Lindheimer's Indian paintbrush
	Castilleja stenantha A. Gray -- not accepted
	Castilleja stenantha A. Gray -- not accepted
	Castilleja suksdorfii A. Gray -- accepted -- Suksdorf's Indian paintbrush
	Castilleja viscidula A. Gray -- accepted -- sticky Indian paintbrush, sticky paintbrush
	Catabrosa aquatica var. uniflora A. Gray -- not accepted
	Cayaponia boykinii (Torr. & A. Gray) Cogn. -- not accepted
	Cayaponia grandifolia (Torr. & A. Gray) Small -- not accepted
	Ceanothus americanus var. intermedius (Pursh) Torr. & A. Gray -- not accepted
	Ceanothus americanus var. pitcheri Torr. & A. Gray -- not accepted
	Ceanothus dentatus Torr. & A. Gray -- accepted -- sandscrub ceanothus
	Ceanothus fendleri A. Gray -- accepted -- Fendler's ceanothus
	Ceanothus greggii A. Gray -- accepted -- desert ceanothus
	Ceanothus greggii ssp. greggii A. Gray -- not accepted -- Gregg's ceanothus
	Ceanothus greggii var. greggii A. Gray -- accepted -- desert ceanothus
	Ceanothus herbaceus var. pubescens (Torr. & A. Gray ex S. Watson) Shinners -- not accepted
	Ceanothus incanus Torr. & A. Gray -- accepted -- coast whitethorn
	Ceanothus ovatus var. pubescens Torr. & A. Gray ex S. Watson -- not accepted
	Ceanothus papillosus Torr. & A. Gray -- accepted -- wartleaf ceanothus
	Ceanothus papillosus ssp. papillosus Torr. & A. Gray -- not accepted -- King hybrid ceanothus
	Ceanothus papillosus var. papillosus Torr. & A. Gray -- accepted -- wartleaf ceanothus
	Ceanothus pubescens (Torr. & A. Gray ex S. Watson) Rydb. ex Small -- not accepted
	Ceanothus velutinus var. laevigatus Torr. & A. Gray -- not accepted
	Cedronella micrantha A. Gray -- not accepted
	Celtis occidentalis var. crassifolia (Lam.) A. Gray -- not accepted
	Celtis occidentalis var. pumila (Pursh) A. Gray -- not accepted -- common hackberry
	Centaurium arizonicum (A. Gray) A. Heller -- not accepted -- Arizona centaury
	Centaurium beyrichii (Torr. & A. Gray ex Torr.) B.L. Rob. -- not accepted -- mountain pink, quinineweed, rock centaury
	Centaurium beyrichii var. beyrichii (Torr. & A. Gray ex Torr.) B.L. Rob. -- not accepted -- quinineweed
	Centaurium calycosum var. arizonicum (A. Gray) Tidestr. -- not accepted
	Centaurium calycosum var. nanum (A. Gray) B.L. Rob. -- not accepted
	Centaurium venustum (A. Gray) B.L. Rob. -- not accepted -- charming centaury
	Centaurium venustum ssp. venustum (A. Gray) B.L. Rob. -- not accepted -- charming centaury
	Centromadia fitchii (A. Gray) Greene -- accepted -- Fitch's tarweed
	Centrostegia A. Gray ex Benth. -- accepted
	Centrostegia leptoceras A. Gray -- not accepted
	Centrostegia leptoceris A. Gray -- not accepted
	Centrostegia thurberi A. Gray ex Benth. -- accepted -- red triangles, spring flower
	Cephalanthera austiniae (A. Gray) A. Heller -- accepted -- phantom orchid
	Ceranthera densiflora (Benth.) A. Gray -- not accepted
	Cerastium brachypodum (Engelm. ex A. Gray) B.L. Rob. -- accepted -- bractpod chickweed, mouse-ear chickweed, short-stalk mouse-ear chickweed, shortstalk chickweed
	Cerastium nutans var. brachypodum Engelm. ex A. Gray -- not accepted
	Ceratophyllum demersum var. echinatum (A. Gray) A. Gray -- not accepted
	Ceratophyllum echinatum A. Gray -- accepted -- spineless hornwort
	Ceratophyllum submersum var. echinatum (A. Gray) Wilmot-Dear -- not accepted
	Cercidium floridum Benth. ex A. Gray -- not accepted
	Cercidium texanum A. Gray -- not accepted
	Cercis occidentalis Torr. ex A. Gray -- accepted -- California redbud
	Cercocarpus breviflorus A. Gray -- accepted -- hairy mountain-mahogany
	Cereus californicus Torr. & A. Gray -- not accepted
	Chaenactis alpina (A. Gray) M.E. Jones -- not accepted
	Chaenactis artemisiifolia (Harv. & A. Gray ex A. Gray) A. Gray -- accepted -- white pincushion
	Chaenactis carphoclinia A. Gray -- accepted -- pebble pincushion
	Chaenactis carphoclinia var. attenuata (A. Gray) M.E. Jones -- not accepted
	Chaenactis carphoclinia var. carphoclinia A. Gray -- accepted -- pebble pincushion, Peeble pincushion
	Chaenactis cusickii A. Gray -- accepted -- Cusick's pincushion
	Chaenactis douglasii var. achilleifolia (Hook. & Arn.) A. Gray -- not accepted
	Chaenactis douglasii var. alpina A. Gray -- accepted -- alpine dustymaiden, alpine pincushion
	Chaenactis fremontii A. Gray -- accepted -- Fremont's pincushion, morningbride, pincushion flower
	Chaenactis glabriuscula var. curta (A. Gray) Jeps. -- not accepted
	Chaenactis glabriuscula var. heterocarpha (Torr. & A. Gray ex A. Gray) H.M. Hall -- accepted -- yellow pincushion
	Chaenactis glabriuscula var. megacephala A. Gray -- accepted -- yellow pincushion
	Chaenactis heterocarpha Torr. & A. Gray ex A. Gray -- not accepted
	Chaenactis nevadensis (Kellogg) A. Gray -- accepted -- Nevada dustymaiden, Nevada pincushion
	Chaenactis nevii A. Gray -- accepted -- John Day's pincushion
	Chaenactis parishii A. Gray -- accepted -- Parish's chaenactis
	Chaenactis stevioides var. brachypappa (A. Gray) H.M. Hall -- not accepted
	Chaenactis suffrutescens A. Gray -- accepted -- Shasta chaenactis
	Chaenactis tanacetifolia A. Gray -- not accepted
	Chaenactis xantiana A. Gray -- accepted -- flesh-color pincushion, fleshcolor pincushion, Xantus pincushion
	Chaerophyllum procumbens var. shortii Torr. & A. Gray -- accepted -- Short's spreading chervil
	Chaerophyllum shortii (Torr. & A. Gray) Bush -- not accepted
	Chaetadelpha A. Gray ex S. Watson -- accepted -- skeletonweed
	Chaetadelpha wheeleri A. Gray ex S. Watson -- accepted -- Wheeler's chaetadelpha, Wheeler's skeletonweed
	Chaetadelphia A. Gray ex S. Watson -- not accepted
	Chaetadelphia wheeleri A. Gray ex S. Watson -- not accepted
	Chaetopappa asteroides var. imberbis A. Gray -- not accepted
	Chaetopappa bellidifolia (A. Gray & Engelm.) Shinners -- accepted -- whiteray leastdaisy
	Chaetopappa bellioides (A. Gray) Shinners -- accepted -- manyflower leastdaisy
	Chaetopappa effusa (A. Gray) Shinners -- accepted -- spreading leastdaisy
	Chaetopappa exilis (A. Gray) D.D. Keck -- not accepted
	Chaetopappa imberbis (A. Gray) G.L. Nesom -- accepted -- awnless leastdaisy
	Chaetopappa lyonii (A. Gray) D.D. Keck -- not accepted
	Chaetopappa parryi A. Gray -- accepted -- Parry's leastdaisy
	Chamaecrista greggii (A. Gray) Pollard ex A. Heller -- accepted -- Gregg's sensitive pea
	Chamaecrista serpens var. wrightii (A. Gray) H.S. Irwin & Barneby -- accepted -- shrubby senna, Wright's sensitive pea
	Chamaecrista wrightii (A. Gray) Wooton & Standl. -- not accepted
	Chamaelirium luteum (L.) A. Gray -- accepted -- fairywand
	Chamaesaracha (A. Gray) Benth. -- accepted -- five eyes
	Chamaesaracha coronopus (Dunal) A. Gray -- accepted -- green false nightshade, green-leaf five-eyes, greenleaf five eyes
	Chamaesaracha nana (A. Gray) A. Gray -- not accepted
	Chamaesaracha sordida (Dunal) A. Gray -- accepted -- hairy five eyes
	Chamaesyce albomarginata (Torr. & A. Gray) Small -- not accepted -- rattlesnake weed, whitemargin euphorbia, whitemargin sandmat, whitemargin spurge
	Chamaesyce celastroides var. lorifolia (A. Gray ex H. Mann) O. Deg. & I. Deg. -- not accepted -- `ekoko
	Chamaesyce fendleri (Torr. & A. Gray) Small -- not accepted -- Fendler's sandmat
	Chamaesyce fendleri var. fendleri (Torr. & A. Gray) Small -- not accepted -- Fendler's sandmat
	Chamaesyce humistrata (Engelm. ex A. Gray) Small -- not accepted -- spreading sandmat
	Chamaesyce lorifolia (A. Gray ex H. Mann) Croizat & O. Deg. -- not accepted
	Chamaesyce melanadenia (Torr. & A. Gray) Millsp. -- not accepted -- prostrate spurge, red-gland spurge, squaw sandmat
	Chamaesyce remyi (A. Gray ex Boiss.) Croizat & O. Deg. -- not accepted -- Remy's sandmat
	Chamaesyce remyi var. remyi (A. Gray ex Boiss.) Croizat & O. Deg. -- not accepted -- akoko, Remy's sandmat
	Chapmannia Torr. & A. Gray -- accepted
	Chapmannia floridana Torr. & A. Gray -- accepted -- Florida alicia
	Chenopodium ambrosioides var. anthelminticum (L.) A. Gray -- not accepted
	Chiogenes hispidula (L.) Torr. & A. Gray -- not accepted
	Chloris verticillata var. aristulata Torr. & A. Gray -- not accepted
	Chloropyron maritimum ssp. canescens (A. Gray) Tank & J.M. Egger -- accepted -- Pt. Reyes bird's-beak
	Chloropyron molle (A. Gray) A. Heller -- accepted -- soft bird's-beak
	Chloropyron molle ssp. molle (A. Gray) A. Heller -- accepted -- soft bird's-beak
	Choisya dumosa (Torr.) A. Gray -- accepted -- Mexican orange, starleaf
	Choisya dumosa var. dumosa (Torr.) A. Gray -- accepted -- Mexican orange
	Chorizanthe californica (Benth.) A. Gray -- not accepted
	Chorizanthe corrugata (Torr.) Torr. & A. Gray -- accepted -- wrinkled chorizanthe, wrinkled spineflower
	Chorizanthe leptoceras (A. Gray) S. Watson -- not accepted
	Chorizanthe perfoliata A. Gray -- not accepted
	Chorizanthe polygonoides Torr. & A. Gray -- accepted -- knotweed spineflower
	Chorizanthe polygonoides var. polygonoides Torr. & A. Gray -- accepted -- knotweed spineflower
	Chorizanthe rigida (Torr.) Torr. & A. Gray -- accepted -- devil's spineflower, spiny chorizanthe, turkshead
	Chorizanthe thurberi (A. Gray ex Benth.) S. Watson -- not accepted
	Chorizanthe uniaristata Torr. & A. Gray -- accepted -- oneawn spineflower
	Chorizanthe watsonii Torr. & A. Gray -- accepted -- five-tooth spineflower, fivetooth spineflower, Watson's chorizanthe
	Chromolaena bigelovii (A. Gray) R.M. King & H. Rob. -- accepted -- Bigelow's thoroughwort
	Chrysactinia A. Gray -- accepted -- chrysactinia
	Chrysactinia mexicana A. Gray -- accepted -- damianita
	Chrysogonum virginianum var. dentatum A. Gray -- not accepted
	Chrysopsis bolanderi A. Gray -- not accepted
	Chrysopsis breweri A. Gray -- not accepted
	Chrysopsis canescens (DC.) Torr. & A. Gray non DC. -- not accepted
	Chrysopsis canescens var. nana A. Gray -- not accepted
	Chrysopsis graminifolia var. aspera (Shuttlew. ex Small) A. Gray -- not accepted
	Chrysopsis graminifolia var. aspera (Shuttlew. ex Small) A. Gray -- not accepted
	Chrysopsis hispida var. stenophylla A. Gray -- not accepted
	Chrysopsis oligantha Chapm. ex Torr. & A. Gray -- not accepted
	Chrysopsis oregona (Nutt.) A. Gray -- not accepted
	Chrysopsis oregona var. scaberrima A. Gray -- not accepted
	Chrysopsis scabrella Torr. & A. Gray -- accepted -- coastal plain goldenaster, coastalplain goldenaster
	Chrysopsis sessiliflora var. bolanderi (A. Gray) A. Gray -- not accepted
	Chrysopsis sessiliflora var. echioides (Benth.) A. Gray -- not accepted
	Chrysopsis stenophylla (A. Gray) Greene -- not accepted
	Chrysopsis villosa var. bolanderi (A. Gray) A. Gray ex Jeps. -- not accepted
	Chrysopsis villosa var. canescens (DC.) A. Gray -- not accepted
	Chrysopsis villosa var. echioides (Benth.) A. Gray -- not accepted
	Chrysopsis villosa var. hispida (Hook.) A. Gray -- not accepted
	Chrysopsis villosa var. sessiliflora (Nutt.) A. Gray -- not accepted
	Chrysopsis villosa var. stenophylla (A. Gray) A. Gray -- not accepted
	Chrysopsis villosa var. viscida A. Gray -- not accepted
	Chrysopsis viscida (A. Gray) Greene -- not accepted
	Chrysopsis wrightii A. Gray -- not accepted
	Chrysothamnus albidus (M.E. Jones ex A. Gray) Greene -- not accepted -- alkali rabbitbrush, whiteflower rabbitbrush
	Chrysothamnus bolanderi (A. Gray) Greene -- not accepted
	Chrysothamnus greenei (A. Gray) Greene -- accepted -- Greene's rabbitbrush
	Chrysothamnus howardii (Parry ex A. Gray) Greene -- not accepted
	Chrysothamnus nauseosus ssp. bigelovii (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus nauseosus ssp. bolanderi (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus nauseosus ssp. hololeucus (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus nauseosus ssp. latisquameus (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus nauseosus ssp. leiospermus (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus nauseosus var. bigelovii (A. Gray) H.M. Hall -- not accepted
	Chrysothamnus nauseosus var. glabratus (A. Gray) Cronquist -- not accepted
	Chrysothamnus nauseosus var. hololeucus (A. Gray) H.M. Hall -- not accepted
	Chrysothamnus nauseosus var. latisquameus (A. Gray) H.M. Hall -- not accepted
	Chrysothamnus nauseosus var. leiospermus (A. Gray) H.M. Hall -- not accepted
	Chrysothamnus paniculatus (A. Gray) H.M. Hall -- not accepted
	Chrysothamnus parryi (A. Gray) Greene -- not accepted
	Chrysothamnus parryi ssp. howardii (Parry ex A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus parryi ssp. nevadensis (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus parryi ssp. parryi (A. Gray) Greene -- not accepted -- Parry's rabbitbrush
	Chrysothamnus parryi var. howardii (Parry ex A. Gray) Kittell -- not accepted
	Chrysothamnus parryi var. nevadensis (A. Gray) Kittell -- not accepted
	Chrysothamnus pulchellus (A. Gray) Greene -- not accepted -- southwest rabbitbrush, southwestern rabbitbrush
	Chrysothamnus vaseyi (A. Gray) Greene -- accepted -- Vasey's rabbitbrush
	Chrysothamnus viscidiflorus ssp. stenophyllus (A. Gray) H.M. Hall & Clem. -- not accepted
	Chrysothamnus viscidiflorus ssp. viscidiflorus var. stenophyllus (A. Gray) H.M. Hall -- not accepted -- small rabbitbrush, yellow rabbitbrush
	Chrysothamnus viscidiflorus var. stenophyllus (A. Gray) H.M. Hall -- not accepted -- yellow rabbitbrush
	Chylismia (Nutt. ex Torr. & A. Gray) Raim. -- accepted
	Chylismia brevipes (A. Gray) Small -- accepted -- yellow cups
	Chylismia brevipes ssp. brevipes (A. Gray) Small -- accepted -- golden suncup
	Chylismia scapoidea (Torr. & A. Gray) Small -- not accepted -- Paiute suncup
	Chylismia scapoidea (Torr. & A. Gray) Nutt. ex Raim. -- accepted
	Chylismia scapoidea ssp. scapoidea (Torr. & A. Gray) Nutt. ex Raim. -- accepted
	Chylismia scapoidea ssp. scapoidea (Torr. & A. Gray) Small -- not accepted -- Paiute suncup
	Cicuta maculata var. californica (A. Gray) B. Boivin -- not accepted
	Cienfuegosia drummondii (A. Gray) Lewton -- accepted -- sulphur mallow, yellow flymallow, yellow fugosia
	Cimicifuga cordifolia (DC.) Torr. & A. Gray -- not accepted
	Cimicifuga racemosa var. cordifolia (DC.) A. Gray -- not accepted
	Cimicifuga racemosa var. dissecta A. Gray -- not accepted
	Cinna arundinacea var. pendula (Trin.) A. Gray -- not accepted
	Cirsium acaule var. americanum A. Gray -- not accepted
	Cirsium altissimum var. filipendulum (Engelm.) A. Gray -- not accepted
	Cirsium americanum (A. Gray) K. Schum. -- not accepted
	Cirsium andersonii (A. Gray) Petr. -- accepted -- Anderson's thistle, rose thistle
	Cirsium andrewsii (A. Gray) Jeps. -- accepted -- Franciscan thistle
	Cirsium arizonicum (A. Gray) Petr. -- accepted -- Arizona thistle
	Cirsium arizonicum var. arizonicum (A. Gray) Petr. -- accepted -- Arizona thistle
	Cirsium arizonicum var. rothrockii (A. Gray) D.J. Keil -- accepted -- Rothrock's thistle
	Cirsium breweri (A. Gray) Jeps. -- not accepted
	Cirsium californicum A. Gray -- not accepted
	Cirsium californicum var. californicum A. Gray -- not accepted -- California thistle
	Cirsium clavatum var. americanum (A. Gray) D.J. Keil -- accepted -- crow thistle, fringed thistle, gray thistle, lacy thistle, mountain slope thistle, porcupine thistle, Rocky Mountain fringed thistle
	Cirsium coulteri Harv. & A. Gray -- not accepted
	Cirsium douglasii var. breweri (A. Gray) D.J. Keil & C.E. Turner -- accepted -- Douglas' thistle
	Cirsium drummondii Torr. & A. Gray -- accepted -- dwarf thistle
	Cirsium eatonii (A. Gray) B.L. Rob. -- accepted -- Eaton's thistle, mountaintop thistle
	Cirsium eatonii var. eatonii (A. Gray) B.L. Rob. -- accepted -- Eaton's thistle, mountaintop thistle
	Cirsium eatonii var. eriocephalum (A. Gray) D.J. Keil -- accepted -- alpine thistle, mountain thistle
	Cirsium eriocephalum A. Gray -- not accepted
	Cirsium grahamii A. Gray -- accepted -- Graham's thistle
	Cirsium hallii (A. Gray) M.E. Jones -- not accepted -- Hall's thistle
	Cirsium hookerianum var. eriocephalum (A. Gray) A. Nelson -- not accepted
	Cirsium horridulum var. elliottii Torr. & A. Gray -- not accepted
	Cirsium hydrophilum var. vaseyi (A. Gray) J.T. Howell -- accepted -- Vasey's thistle
	Cirsium lecontei Torr. & A. Gray -- accepted -- Le Conte's thistle
	Cirsium megacephalum (A. Gray) Cockerell -- not accepted
	Cirsium neomexicanum A. Gray -- accepted -- lavender thistle, New Mexico thistle, powderpuff thistle, Utah thistle
	Cirsium neomexicanum var. neomexicanum A. Gray -- not accepted -- New Mexico thistle
	Cirsium occidentale var. californicum (A. Gray) Keil & C. Turner -- accepted -- cobwebby thistle
	Cirsium occidentale var. coulteri (Harv. & A. Gray) Jeps. -- accepted -- Coulter's thistle
	Cirsium ochrocentrum A. Gray -- accepted -- yellowspine thistle
	Cirsium ochrocentrum ssp. ochrocentrum A. Gray -- accepted -- yellowspine thistle
	Cirsium parryi (A. Gray) Petr. -- accepted -- Cloudcroft thistle, Gila thistle, Mogollon thistle, pale thistle, Parry's thistle
	Cirsium parryi ssp. parryi (A. Gray) Petr. -- not accepted -- Parry's thistle
	Cirsium pitcheri (Torr. ex Eaton) Torr. & A. Gray -- accepted -- Pitcher's thistle, sand dune thistle
	Cirsium quercetorum (A. Gray) Jeps. -- accepted -- Alameda County thistle
	Cirsium quercetorum var. quercetorum (A. Gray) Jeps. -- not accepted -- Alameda County thistle
	Cirsium rothrockii (A. Gray) Petr. -- not accepted -- Rothrock's thistle
	Cirsium scariosum var. americanum (A. Gray) D.J. Keil -- accepted -- dinnerplate thistle, sessile thistle, stemless thistle, Tioga thistle
	Cirsium undulatum var. megacephalum (A. Gray) Fernald -- not accepted
	Cirsium vaseyi (A. Gray) Jeps. -- not accepted
	Cirsium wheeleri (A. Gray) Petr. -- accepted -- Wheeler's thistle
	Cirsium wrightii A. Gray -- accepted -- Wright's marsh thistle, Wright's thistle
	Cistanthe parryi (A. Gray) Hershk. -- accepted -- Parry's pussypaws
	Cistanthe parryi var. parryi (A. Gray) Hershk. -- not accepted -- Parry's pussypaws
	Cistanthe tweedyi (A. Gray) Hershk. -- accepted -- Tweedy's pussypaws
	Cistanthe umbellata var. caudicifera (A. Gray) Kartesz & Gandhi -- not accepted -- Mt. Hood pussypaws
	Citharexylum brachyanthum (A. Gray) A. Gray -- accepted -- boxthorn fiddlewood, Mexican fiddlewood
	Clappia A. Gray -- not accepted
	Clappia A. Gray -- accepted -- clapdaisy
	Clappia suaedifolia A. Gray -- accepted -- fleshy clapdaisy
	Clarkia amoena ssp. whitneyi (A. Gray) F.H. Lewis & M.E. Lewis -- accepted -- Whitney's clarkia
	Clarkia breweri (A. Gray) Greene -- accepted -- fairy fans
	Clarkia epilobioides (Nutt. ex Torr. & A. Gray) A. Nelson & J.F. Macbr. -- accepted -- canyon clarkia, canyon fairyfan
	Clarkia xantiana A. Gray -- accepted -- gunsight clarkia
	Clarkia xantiana ssp. xantiana A. Gray -- accepted -- gunsight clarkia
	Claytonia exigua Torr. & A. Gray -- accepted -- serpentine springbeauty
	Claytonia exigua ssp. exigua Torr. & A. Gray -- accepted -- serpentine springbeauty
	Claytonia exigua ssp. glauca (Torr. & A. Gray) John M. Mill. & K.L. Chambers -- accepted -- serpentine springbeauty
	Claytonia heterophylla (Torr. & A. Gray) Swanson -- not accepted -- variableleaf springbeauty
	Claytonia megarhiza (A. Gray) Parry ex S. Watson -- accepted -- alpine springbeauty
	Claytonia megarhiza var. megarhiza (A. Gray) Parry ex S. Watson -- not accepted -- alpine springbeauty
	Claytonia parviflora var. depressa A. Gray -- not accepted
	Claytonia parviflora var. glauca Nutt. ex Torr. & A. Gray -- not accepted
	Claytonia perfoliata var. depressa (A. Gray) Poelln. -- not accepted
	Claytonia rubra ssp. depressa (A. Gray) John M. Mill. & K.L. Chambers -- accepted -- redstem springbeauty
	Claytonia sibirica var. bulbifera A. Gray -- not accepted -- Siberian springbeauty
	Claytonia sibirica var. heterophylla (Torr. & A. Gray) A. Gray -- not accepted
	Claytonia spathulata var. exigua (Torr. & A. Gray) Hook. & Arn. -- not accepted
	Claytonia spathulata var. tenuifolia Torr. & A. Gray -- not accepted
	Clematis baldwinii Torr. & A. Gray -- accepted -- pine hyacinth
	Clematis baldwinii var. baldwinii Torr. & A. Gray -- not accepted -- pine hyacinth
	Clematis columbiana (Nutt.) Torr. & A. Gray -- accepted -- Columbian virgin's-bower, rock clematis
	Clematis columbiana var. columbiana (Nutt.) Torr. & A. Gray -- accepted -- Columbian virginsbower, rock clematis
	Clematis columbiana var. tenuiloba (A. Gray) J.S. Pringle -- accepted -- Columbian virgin's-bower, rock clematis
	Clematis drummondii Torr. & A. Gray -- accepted -- Drummond's clematis, old man's beard
	Clematis pitcheri Torr. & A. Gray -- accepted -- bluebill, Pitcher's clematis, Pitcher's virginsbower
	Clematis pitcheri var. filifera (Benth.) B.L. Rob. ex A. Gray -- not accepted
	Clematis pitcheri var. pitcheri Torr. & A. Gray -- accepted -- bluebill, Pitcher's clematis
	Clematis tenuiloba A. Gray -- not accepted
	Clematis verticillaris var. columbiana (Nutt.) A. Gray -- not accepted
	Clementsia rhodantha (A. Gray) Rose -- not accepted
	Cleome sandwicensis A. Gray -- not accepted
	Cleome sonorae A. Gray -- not accepted
	Cleome tenuifolia Leconte ex Torr. & A. Gray (pro. syn.) -- not accepted
	Cleomella oocarpa A. Gray -- not accepted
	Cleomella parviflora A. Gray -- accepted -- slender cleomella, small-flower stinkweed, smallflower cleomella
	Clermontia parviflora Gaudich. ex A. Gray -- accepted -- smallflower clermontia
	Cnicus arizonicus A. Gray -- not accepted
	Cnicus breweri var. vaseyi A. Gray -- not accepted
	Cnicus ochrocentrus (A. Gray) A. Gray -- not accepted
	Cnicus parryi A. Gray -- not accepted
	Cnicus undulatus var. megacephalus A. Gray -- not accepted
	Cnicus wheeleri A. Gray -- not accepted
	Cnidoscolus stimulosus (Michx.) Engelm. & A. Gray -- not accepted -- finger rot
	Coelophragmus auriculatus (A. Gray) O.E. Schulz -- accepted -- eared hedgemustard
	Coelostylis Torr. & A. Gray -- not accepted
	Coelostylis loganioides Torr. & A. Gray ex Endl. & Fenzl -- not accepted
	Cogswellia daucifolia (Torr. & A. Gray) M.E. Jones -- not accepted
	Cogswellia macrocarpa (Nutt. ex Torr. & A. Gray) M.E. Jones -- not accepted
	Coldenia greggii (Torr. & A. Gray) A. Gray -- not accepted
	Coldenia hispidissima (Torr. & A. Gray) A. Gray -- not accepted
	Coldenia palmeri A. Gray -- not accepted
	Collinsia childii Parry ex A. Gray -- accepted -- Child's blue eyed Mary
	Collinsia grandiflora var. pusilla A. Gray -- not accepted
	Collinsia greenei A. Gray -- accepted -- Greene's blue eyed Mary
	Collinsia linearis A. Gray -- accepted -- narrowleaf blue eyed Mary
	Collinsia parryi A. Gray -- accepted -- Parry's blue eyed Mary
	Collinsia rattanii A. Gray -- accepted -- sticky blue eyed Mary
	Collinsia rattanii ssp. rattanii A. Gray -- accepted -- sticky blue eyed Mary
	Collinsia rattanii var. linearis (A. Gray) Newsom -- not accepted
	Collinsia torreyi A. Gray -- accepted -- Torrey's blue eyed Mary, Torrey's blue-eyed Mary
	Collinsia torreyi var. torreyi A. Gray -- accepted -- Torrey's blue eyed Mary, Torrey's blue-eyed Mary
	Collinsonia canadensis var. punctata (Elliott) A. Gray -- not accepted
	Collomia debilis var. larsenii (A. Gray) Brand -- not accepted
	Collomia larsenii (A. Gray) Payson -- accepted -- talus collomia
	Collomia tenella A. Gray -- accepted -- diffuse collomia
	Cologania lemmonii A. Gray -- not accepted -- Lemmon's cologania
	Cologania longifolia A. Gray -- not accepted
	Colubrina texensis (Torr. & A. Gray) A. Gray -- accepted -- Texan hogplum, Texas colubrina
	Colubrina texensis var. texensis (Torr. & A. Gray) A. Gray -- accepted -- Texan hogplum
	Columbiadoria hallii (A. Gray) G.L. Nesom -- accepted -- Hall's columbiadoria
	Comarobatia lasiococca (A. Gray) Greene -- not accepted
	Condalia ericoides (A. Gray) M.C. Johnst. -- accepted -- javelina bush
	Condalia lycioides (A. Gray) Weberb. -- not accepted
	Condalia lycioides var. canescens (A. Gray) Trel. -- not accepted
	Condalia obtusifolia (Hook. ex Torr. & A. Gray) Weberb. -- not accepted
	Condalia spathulata A. Gray -- accepted -- knifeleaf condalia, knifeleaf snakewood, squawbush
	Condaliopsis lycioides (A. Gray) Suess. -- not accepted
	Condaliopsis lycioides var. canescens (A. Gray) Suess. -- not accepted
	Conioselinum scopulorum (A. Gray) J.M. Coult. & Rose -- accepted -- Rocky Mountain hemlock-parsley, Rocky Mountain hemlockparsley
	Conoclinium betonicifolium var. integrifolium (A. Gray) T.F. Patterson -- accepted
	Conoclinium dissectum A. Gray -- accepted -- palmleaf thoroughwort
	Conoclinium greggii (A. Gray) Small -- not accepted -- palmleaf thoroughwort
	Conopholis alpina var. mexicana (A. Gray ex S. Watson) R.R. Haynes -- accepted -- alpine squawroot, Mexican cancer-root, Mexican squawroot
	Conopholis mexicana A. Gray ex S. Watson -- not accepted
	Conradina A. Gray -- accepted -- false rosemary
	Conradina canescens (Torr. & A. Gray ex Benth.) A. Gray -- accepted -- false rosemary
	Constancea nevinii (A. Gray) B.G. Baldw. -- accepted -- Nevin's woolly sunflower
	Convolvulus fulcratus (A. Gray) Greene -- not accepted
	Convolvulus hermannioides A. Gray -- not accepted
	Convolvulus luteolus var. fulcratus A. Gray -- not accepted
	Convolvulus occidentalis A. Gray -- not accepted
	Convolvulus sepium var. pubescens (A. Gray) Fernald -- not accepted
	Convolvulus sepium var. repens (L.) A. Gray -- not accepted
	Convolvulus spithamaeus var. pubescens (A. Gray) Fernald -- not accepted
	Conyza canadensis var. glabrata (A. Gray) Cronquist -- not accepted -- Canadian horseweed
	Conyza coulteri A. Gray -- not accepted
	Conyza coulteri var. tenuisecta A. Gray -- not accepted
	Conyza coulteri var. virgata (Benth.) A. Gray -- not accepted
	Conyza eriophylla (A. Gray) Cronquist -- not accepted
	Coprosma ernodeoides A. Gray -- accepted -- `aiakanene
	Coprosma foliosa A. Gray -- accepted -- forest mirrorplant
	Coprosma kauensis (A. Gray) A. Heller -- accepted -- koi
	Coprosma longifolia A. Gray -- accepted -- Oahu mirrorplant
	Coprosma menziesii A. Gray -- accepted -- hupilo
	Coprosma pubens A. Gray -- accepted -- pubescent mirrorplant
	Coprosma rhynchocarpa A. Gray -- accepted -- woodland mirrorplant
	Coptis laciniata A. Gray -- accepted -- Oregon goldthread
	Coptis occidentalis (Nutt.) Torr. & A. Gray -- accepted -- Idaho goldthread
	Corchorus hirtus var. glabellus A. Gray -- not accepted -- Orinoco jute
	Cordylanthus bolanderi (A. Gray) Pennell -- not accepted
	Cordylanthus canescens A. Gray -- not accepted
	Cordylanthus laxiflorus A. Gray -- accepted -- nodding bird's beak, nodding bird's-beak
	Cordylanthus maritimus ssp. canescens (A. Gray) T.I. Chuang & Heckard -- not accepted -- saltmarsh bird's-beak, saltmarsh bird'sbeak
	Cordylanthus maritimus var. canescens (A. Gray) Jeps. -- not accepted
	Cordylanthus mollis A. Gray -- not accepted -- soft bird's-beak
	Cordylanthus mollis ssp. mollis A. Gray -- not accepted -- soft bird's-beak
	Cordylanthus nevinii A. Gray -- accepted -- Nevin's bird's-beak
	Cordylanthus orcuttianus A. Gray -- not accepted -- Orcutt's bird's-beak
	Cordylanthus pilosus A. Gray -- accepted -- hairy bird's-beak
	Cordylanthus pilosus ssp. bolanderi (A. Gray) Munz -- not accepted
	Cordylanthus pilosus ssp. pilosus A. Gray -- accepted -- hairy bird's beak
	Cordylanthus pringlei A. Gray -- accepted -- Pringle's bird's beak
	Cordylanthus rigidus ssp. brevibracteatus (A. Gray) Munz -- accepted -- stiffbranch bird's beak
	Cordylanthus tenuis A. Gray -- accepted -- slender bird's beak, slender bird'sbeak
	Cordylanthus tenuis ssp. tenuis A. Gray -- accepted -- slender bird's beak, slender bird'sbeak
	Cordylanthus wrightii A. Gray -- accepted -- Wright's bird's beak, Wright's bird's-beak
	Cordylanthus wrightii ssp. wrightii A. Gray -- accepted -- Wright's bird's beak, Wright's bird's-beak
	Coreocarpus arizonicus (A. Gray) S.F. Blake -- accepted -- Arizona coreocarpus, little lemonhead
	Coreopsis basalis var. wrightii (A. Gray) S.F. Blake -- not accepted
	Coreopsis bigelovii (A. Gray) H.M. Hall -- accepted -- Bigelow's tickseed
	Coreopsis californica var. newberryi (A. Gray) E.B. Sm. -- not accepted -- Newberry's tickseed
	Coreopsis calliopsidea (DC.) A. Gray -- accepted -- leafstem tickseed
	Coreopsis cardaminefolia (DC.) Torr. & A. Gray -- not accepted
	Coreopsis drummondii (D. Don) Torr. & A. Gray -- not accepted
	Coreopsis drummondii var. wrightii A. Gray -- not accepted
	Coreopsis grandiflora var. harveyana (A. Gray) Sherff -- not accepted -- largeflower tickseed
	Coreopsis grandiflora var. longipes (Hook.) Torr. & A. Gray -- not accepted -- largeflower tickseed
	Coreopsis leavenworthii Torr. & A. Gray -- accepted -- Leavenworth's tickseed
	Coreopsis leavenworthii var. garberi A. Gray -- not accepted
	Coreopsis newberryi A. Gray -- not accepted
	Coreopsis pubescens var. robusta A. Gray ex Eames -- not accepted -- star tickseed
	Coreopsis stillmanii (A. Gray) S.F. Blake -- accepted -- Stillman's tickseed
	Coreopsis wrightii (A. Gray) H.M. Parker -- not accepted -- rock tickseed
	Corethrogyne filaginifolia var. rigida A. Gray -- not accepted
	Corethrogyne filaginifolia var. virgata (Benth.) A. Gray -- not accepted -- common sandaster
	Corethrogyne tomentella (Hook. & Arn.) Torr. & A. Gray -- not accepted
	Coriflora baldwinii (Torr. & A. Gray) W.A. Weber -- not accepted
	Coriflora pitcheri (Torr. & A. Gray) W.A. Weber -- not accepted
	Cornus alba var. occidentalis (Torr. & A. Gray) B. Boivin -- not accepted
	Cornus occidentalis (Torr. & A. Gray) Coville -- not accepted
	Cornus sericea ssp. occidentalis (Torr. & A. Gray) Fosberg -- accepted -- western dogwood
	Cornus stolonifera var. occidentalis (Torr. & A. Gray) C.L. Hitchc. -- not accepted
	Corydalis aurea ssp. occidentalis (Engelm. ex A. Gray) G.B. Ownbey -- accepted -- curvepod fumewort, scrambled eggs
	Corydalis aurea var. micrantha Engelm. ex A. Gray -- not accepted
	Corydalis aurea var. occidentalis Engelm. ex A. Gray -- not accepted
	Corydalis caseana A. Gray -- accepted -- Sierra fumewort
	Corydalis caseana ssp. caseana A. Gray -- accepted -- Sierra fumewort
	Corydalis curvisiliqua ssp. occidentalis (Engelm. ex A. Gray) W.A. Weber -- not accepted -- curvepod fumewort
	Corydalis micrantha (Engelm. ex A. Gray) A. Gray -- accepted -- smallflower corydalis, smallflower fumewort
	Corydalis micrantha ssp. micrantha (Engelm. ex A. Gray) A. Gray -- accepted -- smallflower fumewort
	Cottsia gracilis (A. Gray) W.R. Anderson & C. Davis -- accepted
	Cotyledon strictiflora (A. Gray) Baker -- not accepted
	Coursetia caribaea var. sericea (A. Gray) Lavin -- accepted -- anil falso
	Coursetia glabella (A. Gray) Lavin -- accepted -- smooth babybonnets, smooth coursetia
	Coursetia glandulosa A. Gray -- accepted -- rosary babybonnets
	Coursetia microphylla A. Gray -- not accepted
	Cowania ericifolia Torr. ex A. Gray -- not accepted
	Cracca edwardsii A. Gray -- not accepted
	Cracca edwardsii var. glabella A. Gray -- not accepted
	Cracca edwardsii var. sericea A. Gray -- not accepted
	Cracca glabella (A. Gray) Lavin -- not accepted
	Cracca leiocarpa (A. Gray) Kuntze -- not accepted
	Cracca sericea (A. Gray) A. Gray -- not accepted
	Crassula drummondii (Torr. & A. Gray) Fedde -- accepted -- small-leaf pygmyweed, smallleaf pygmyweed
	Crassula drummondii sensu (Torr. & A. Gray) Fedde -- not accepted -- smallleaf pygmyweed
	Crataegus aestivalis (Walter) Torr. & A. Gray -- accepted -- may hawthorn
	Crataegus berberifolia Torr. & A. Gray -- accepted -- barberry hawthorn, barberry-leaved hawthorn
	Crataegus berberifolia var. berberifolia Torr. & A. Gray -- accepted -- barberry hawthorn
	Crataegus mollis (Torr. & A. Gray) Scheele -- accepted -- Arnold hawthorn, downy hawthorn, red hawthorn
	Crataegus mollis var. mollis (Torr. & A. Gray) Scheele -- accepted -- downy hawthorn
	Crataegus nudiflora Nutt. ex Torr. & A. Gray -- not accepted
	Crepis glauca (Nutt.) Torr. & A. Gray -- not accepted
	Crepis intermedia A. Gray -- accepted -- gray hawksbeard, limestone hawksbeard
	Crepis occidentalis ssp. costata (A. Gray) Babc. & Stebbins -- accepted -- largeflower hawksbeard
	Crepis occidentalis var. costata A. Gray -- not accepted
	Crepis pleurocarpa A. Gray -- accepted -- nakedstem hawksbeard
	Crepis runcinata (James) Torr. & A. Gray -- accepted -- dandelion hawksbeard, fiddle-leaf hawk's-beard, fiddle-leaf hawksbeard, fiddleleaf hawksbeard
	Crepis runcinata ssp. andersonii (A. Gray) Babc. & Stebbins -- accepted -- Anderson's hawksbeard
	Crepis runcinata ssp. runcinata (James) Torr. & A. Gray -- accepted -- dandelion hawksbeard, fiddle-leaf hawk's-beard, fiddleleaf hawksbeard
	Crepis runcinata var. andersonii (A. Gray) Cronquist -- not accepted
	Cristatella jamesii Torr. & A. Gray -- not accepted
	Crockeria chrysantha Greene ex A. Gray -- not accepted
	Crookea microsepala (Torr. & A. Gray) Small -- not accepted
	Croptilon divaricatum var. hookerianum (Torr. & A. Gray) Shinners -- not accepted
	Croptilon hookerianum (Torr. & A. Gray) House -- accepted -- Hooker's scratchdaisy
	Croptilon hookerianum var. hookerianum (Torr. & A. Gray) House -- accepted -- Hooker's scratchdaisy
	Croton capitatus var. lindheimeri (Engelm. & A. Gray) M�ll. Arg. -- not accepted -- Lindheimer's hogwort
	Croton eutrigynus A. Gray -- not accepted
	Croton lindheimeri (Engelm. & A. Gray) Alph. Wood -- accepted -- Lindheimer's hogwort
	Crusea subulata (DC.) A. Gray -- not accepted
	Crusea tricocca (Torr. & A. Gray) A. Heller -- not accepted
	Crusea wrightii A. Gray -- not accepted
	Cryptantha affinis (A. Gray) Greene -- accepted -- common cryptantha, quill cryptantha
	Cryptantha ambigua (A. Gray) Greene -- accepted -- basin cryptantha, Wickes cryptantha, Wilkes cryptantha
	Cryptantha barbigera (A. Gray) Greene -- accepted -- bearded catseye, bearded cryptantha
	Cryptantha calycosa (A. Gray) Rydb. -- not accepted
	Cryptantha crassisepala (Torr. & A. Gray) Greene -- accepted -- deertongue, thick-sepal catseye, thicksepal cryptantha
	Cryptantha crassisepala var. crassisepala (Torr. & A. Gray) Greene -- accepted -- thicksepal catseye, thicksepal cryptantha
	Cryptantha dumetorum (Greene ex A. Gray) Greene -- accepted -- bush-loving catseye, bushloving cryptantha
	Cryptantha fendleri (A. Gray) Greene -- accepted -- Fendler's cryptantha, sanddune catseye, sanddune cryptantha
	Cryptantha holoptera (A. Gray) J.F. Macbr. -- accepted -- winged catseye, winged cryptantha
	Cryptantha humilis (A. Gray) Payson -- accepted -- round-spike catseye, roundspike cryptantha
	Cryptantha intermedia (A. Gray) Greene -- accepted -- Clearwater catseye, Clearwater cryptantha, common cryptantha
	Cryptantha intermedia var. intermedia (A. Gray) Greene -- not accepted -- Clearwater catseye
	Cryptantha micrantha ssp. lepida (A. Gray) Mathew & P.H. Raven -- not accepted
	Cryptantha micrantha var. lepida (A. Gray) I.M. Johnst. -- accepted -- redroot cryptantha
	Cryptantha micromeres (A. Gray) Greene -- accepted -- pygmyflower cryptantha
	Cryptantha microstachys (Greene ex A. Gray) Greene -- accepted -- Tejon cryptantha
	Cryptantha muricata var. jonesii (A. Gray) I.M. Johnst. -- not accepted -- Jones' catseye, Jones' cryptantha
	Cryptantha oxygona (A. Gray) Greene -- accepted -- sharpnut cryptantha, sharpseed cryptantha
	Cryptantha palmeri (A. Gray) Payson -- accepted -- Palmer's catseye, Palmer's cryptantha
	Cryptantha pattersonii (A. Gray) Greene -- not accepted
	Cryptantha pusilla (Torr. & A. Gray) Greene -- accepted -- low catseye, low cryptantha
	Cryptantha sericea (A. Gray) Payson -- accepted -- silky cryptantha
	Cryptantha setosissima (A. Gray) Payson -- accepted -- bristly catseye, bristly cryptantha
	Cryptantha torreyana (A. Gray) Greene -- accepted -- Torrey's cat's-eye, Torrey's cryptantha
	Cryptantha torreyana var. calycosa (A. Gray) Greene -- not accepted
	Cryptantha torreyana var. torreyana (A. Gray) Greene -- not accepted -- Torrey's catseye
	Cryptantha utahensis (A. Gray) Greene -- accepted -- scented catseye, scented cryptantha, Utah cryptantha
	Cryptantha watsonii (A. Gray) Greene -- accepted -- Watson's cryptantha
	Cucurbita digitata A. Gray -- accepted -- coyote gourd, fingerleaf gourd
	Cucurbita perennis (E. James) A. Gray -- not accepted
	Cuphea wrightii A. Gray -- accepted -- Wright's waxweed
	Cuscuta rostrata Shuttlw. ex Engelm. & A. Gray -- accepted -- beaked dodder
	Cusickiella douglasii (A. Gray) Rollins -- accepted -- alkali cusickiella, alkali false whitlowgrass
	Cyanea coriacea (A. Gray) Hillebr. -- accepted -- leatherleaf cyanea
	Cyanea leptostegia A. Gray -- accepted -- giant koke'e cyanea, giant kokee cyanea
	Cyanea obtusa (A. Gray) Hillebr. -- accepted -- bluntlobe cyanea
	Cyanea pilosa A. Gray -- accepted -- hairy cyanea
	Cyanea pilosa ssp. pilosa A. Gray -- accepted -- hairy cyanea
	Cyanea platyphylla (A. Gray) Hillebr. -- accepted -- haha, puna cyanea
	Cyanea superba (Cham.) A. Gray -- accepted -- Mt. Kaala cyanea
	Cyanea superba ssp. superba (Cham.) A. Gray -- accepted -- Mt. Kaala cyanea
	Cyanea tritomantha A. Gray -- accepted -- `aku, `aku `aku
	Cyanococcus atrococcus (A. Gray) Small -- not accepted
	Cycladenia humilis var. tomentosa (A. Gray) A. Gray -- not accepted
	Cyclanthera dissecta (Torr. & A. Gray) Arn. -- accepted -- cut-leaf cyclanthera, cutleaf cyclanthera, Texas coastal plain cyclanthera
	Cylindropuntia californica (Torr. & A. Gray) F.M. Knuth -- accepted
	Cylindropuntia californica var. californica (Torr. & A. Gray) F.M. Knuth -- accepted
	Cymanchum blodgettii (A. Gray) Shinners -- not accepted
	Cymopterus acaulis var. fendleri (A. Gray) Goodrich -- not accepted -- Fendler spring parsley, Fendler's springparsley
	Cymopterus alpinus A. Gray -- not accepted
	Cymopterus anisatus A. Gray -- not accepted
	Cymopterus cinerarius A. Gray -- accepted -- gray springparsley
	Cymopterus fendleri A. Gray -- not accepted
	Cymopterus glomeratus var. fendleri (A. Gray) R.L. Hartm. -- not accepted -- Fendler's springparsley
	Cymopterus littoralis auct. non A. Gray -- not accepted
	Cymopterus montanus Nutt. ex Torr. & A. Gray -- accepted -- Montana wavewing, mountain springparsley
	Cymopterus purpurascens (A. Gray) M.E. Jones -- accepted -- Utah springparsley, widewing spring parsley, widewing springparsley
	Cymopterus terebinthinus (Hook.) Torr. & A. Gray -- not accepted
	Cymopterus terebinthinus var. albiflorus (Torr. & A. Gray) M.E. Jones -- not accepted
	Cymopterus terebinthinus var. foeniculaceus (Nutt. ex Torr. & A. Gray) Cronquist -- not accepted
	Cynanchum arizonicum (A. Gray) Shinners -- not accepted -- Arizona swallow-wort, Arizona swallowwort
	Cynanchum blodgettii (A. Gray) Shinners -- not accepted -- Blodgett's swallow-wort
	Cynanchum pringlei (A. Gray) Henrickson -- not accepted -- Pringle's swallow-wort, Pringle's swallowwort
	Cynoctonum angustifolium (Torr. & A. Gray) Small -- not accepted
	Cynoctonum sessilifolium var. angustifolium Torr. & A. Gray -- not accepted
	Cynoglossum occidentale A. Gray -- accepted -- western hound's tongue
	Cynomarathrum nuttallii (A. Gray) J.M. Coult. & Rose -- not accepted
	Cypripedium californicum A. Gray -- accepted -- California lady's slipper
	Cyrtandra acutangula Seem. ex A. Gray -- not accepted
	Cyrtandra anthropophagorum Seem. ex A. Gray -- accepted
	Cyrtandra arguta (A. Gray) C.B. Clarke -- not accepted
	Cyrtandra ciliata Seem. ex A. Gray -- not accepted
	Cyrtandra coleoides Seem. ex A. Gray -- not accepted
	Cyrtandra dolichocarpa A. Gray -- accepted
	Cyrtandra induta A. Gray -- accepted
	Cyrtandra involucrata Seem. ex A. Gray -- not accepted
	Cyrtandra labiosa A. Gray -- accepted
	Cyrtandra lysiosepala (A. Gray) Hillebr. -- not accepted
	Cyrtandra lysiosepala (A. Gray) C.B. Clarke -- accepted -- oppositeleaf cyrtandra
	Cyrtandra lysiosepala var. lysiosepala (A. Gray) C.B. Clarke -- not accepted
	Cyrtandra macraei A. Gray -- accepted -- upland cyrtandra
	Cyrtandra milnei Seem. ex A. Gray -- accepted
	Cyrtandra pickeringii A. Gray -- accepted -- Pickering's cyrtandra
	Cyrtandra platyphylla A. Gray -- accepted -- `ilihia
	Cyrtandra pogonantha A. Gray -- accepted
	Cyrtandra pritchardii Seem. ex A. Gray -- not accepted
	Cyrtandra pulchella Rich ex A. Gray -- accepted
	Cyrtandra richii A. Gray -- accepted
	Cyrtandra samoensis A. Gray -- accepted
	Cyrtandra taitensis Rich ex A. Gray -- accepted
	Cyrtandra triflora var. gaudichaudii A. Gray -- not accepted
	Cyrtandra triflora var. lysiosepala A. Gray -- not accepted
	Cyrtandra vitiensis Seem. ex A. Gray -- not accepted
	Dalea albiflora A. Gray -- accepted -- white flower dalea, whiteflower prairie clover, whiteflower prairieclover
	Dalea arborescens Torr. ex A. Gray -- not accepted
	Dalea argyrea A. Gray -- not accepted
	Dalea bicolor var. argyrea (A. Gray) Barneby -- accepted -- silver prairie clover, silver prairieclover
	Dalea brachystachya A. Gray -- not accepted -- Fort Bowie prairie clover, Fort Bowie prairie-clover
	Dalea brachystachys A. Gray -- accepted -- Fort Bowie prairie clover, Fort Bowie prairie-clover, Fort Bowie prairieclover
	Dalea calycosa A. Gray -- not accepted
	Dalea carnea var. albida (Torr. & A. Gray) Barneby -- accepted -- whitetassels
	Dalea compacta var. pubescens (A. Gray) Barneby -- accepted -- compact prairie clover, compact prairieclover
	Dalea emarginata (Torr. & A. Gray) Shinners -- accepted -- wedgeleaf prairie clover, wedgeleaf prairieclover
	Dalea emoryi A. Gray -- not accepted
	Dalea filiformis A. Gray -- accepted -- Sonoran prairie clover, Sonoran prairie-clover, Sonoran prairieclover
	Dalea foliosa (A. Gray) Barneby -- accepted -- leafy prairie clover, leafy prairie-clover
	Dalea fremontii Torr. ex A. Gray -- not accepted
	Dalea frutescens A. Gray -- accepted -- black dalea, black prairie clover, black prairieclover
	Dalea greggii A. Gray -- accepted -- Gregg's dalea, Gregg's prairie clover, Gregg's prairieclover
	Dalea hallii A. Gray -- accepted -- Hall's prairie clover, Hall's prairieclover
	Dalea jamesii (Torr.) Torr. & A. Gray -- accepted -- James' dalea, James' prairie clover, James' prairieclover
	Dalea lachnostachys A. Gray -- accepted -- gland-leaf prairie-clover, glandleaf prairie clover, glandleaf prairieclover
	Dalea lasiathera A. Gray -- accepted -- purple dalea, purple prairie clover
	Dalea lemmonii Parry ex A. Gray -- not accepted
	Dalea nana Torr. ex A. Gray -- accepted -- dwarf dalea, dwarf prairie clover, dwarf prairie-clover, dwarf prairieclover
	Dalea nana var. elatior A. Gray ex B.L. Turner -- not accepted
	Dalea nana var. nana Torr. ex A. Gray -- accepted -- dwarf prairie clover, dwarf prairieclover
	Dalea neomexicana (A. Gray) Cory -- accepted -- downy prairie clover, downy prairie-clover, downy prairieclover, New Mexico dalea
	Dalea neomexicana var. neomexicana (A. Gray) Cory -- accepted -- downy prairie clover, New Mexican dalea, New Mexican prairieclover
	Dalea obovata (Torr. & A. Gray) Shinners -- accepted -- pussyfoot
	Dalea ordiae A. Gray -- not accepted
	Dalea parryi Torr. & A. Gray -- not accepted
	Dalea phleoides (Torr. & A. Gray) Shinners -- accepted -- slimspike prairie clover, slimspike prairieclover
	Dalea phleoides var. microphylla (Torr. & A. Gray) Barneby -- accepted -- slimspike prairie clover, slimspike prairieclover
	Dalea phleoides var. phleoides (Torr. & A. Gray) Shinners -- accepted -- slimspike prairie clover, slimspike prairieclover
	Dalea pogonathera A. Gray -- accepted -- bearded dalea, bearded prairie clover, bearded prairieclover
	Dalea pogonathera var. pogonathera A. Gray -- accepted -- bearded dalea, bearded prairie clover, bearded prairieclover
	Dalea polygonoides A. Gray -- accepted -- six-weeks prairie-clover, sixweeks prairie clover, sixweeks prairieclover
	Dalea pringlei A. Gray -- accepted -- Pringle's dalea, Pringle's prairie clover
	Dalea scoparia A. Gray -- not accepted
	Dalea searlsiae (A. Gray) Barneby -- accepted -- Searle's prairieclover, Searles dalea, Searles' prairie clover
	Dalea spinosa A. Gray -- not accepted
	Dalea tenuifolia (A. Gray) Shinners -- accepted -- bigtop dalea, Flimleaf prairieclover, slimleaf prairie clover, slimleaf prairieclover
	Dalea thyrsiflora A. Gray -- not accepted
	Dalea versicolor ssp. versicolor var. sessilis (A. Gray) Barneby -- not accepted -- oakwoods dalea, oakwoods prairie clover
	Dalea versicolor var. sessilis (A. Gray) Barneby -- accepted -- oakwoods prairie clover
	Dalea villosa var. grisea (Torr. & A. Gray) Barneby -- accepted -- silky prairie clover, silky prairieclover
	Dalea wislizeni ssp. sessilis (A. Gray) Gentry -- not accepted
	Dalea wislizeni var. sessilis A. Gray -- not accepted
	Dalea wrightii A. Gray -- accepted -- Wright's dalea, Wright's prairie clover, Wright's prairie-clover, Wright's prairieclover
	Daucosma Engelm. & A. Gray ex A. Gray -- accepted
	Daucosma laciniata Engelm. & A. Gray -- accepted -- meadow parasol
	Decachaena nana (A. Gray) Small -- not accepted
	Decachaena tomentosa (A. Gray) Small -- not accepted
	Decodon verticillatus var. laevigatus Torr. & A. Gray -- not accepted
	Deinandra floribunda (A. Gray) Davidson & Moxley -- accepted -- Tecate tarweed
	Deinandra paniculata (A. Gray) Davidson & Moxley -- accepted -- grassland tarweed, San Diego tarweed
	Delphinium andersoni A. Gray -- not accepted
	Delphinium andersoni var. andersoni A. Gray -- not accepted
	Delphinium andersonii A. Gray -- accepted -- Anderson's larkspur
	Delphinium andersonii ssp. andersonii A. Gray -- not accepted -- Anderson's larkspur
	Delphinium californicum Torr. & A. Gray -- accepted -- California larkspur
	Delphinium californicum ssp. californicum Torr. & A. Gray -- accepted -- California larkspur
	Delphinium decorum var. patens (Benth.) A. Gray -- not accepted
	Delphinium hesperium A. Gray -- accepted -- foothill larkspur
	Delphinium hesperium ssp. hesperium A. Gray -- accepted -- foothill larkspur
	Delphinium nudicaule Torr. & A. Gray -- accepted -- red larkspur
	Delphinium nuttallii A. Gray -- accepted -- upland larkspur
	Delphinium nuttallii ssp. nuttallii A. Gray -- accepted -- upland larkspur
	Delphinium parishii A. Gray -- accepted -- desert larkspur
	Delphinium parishii ssp. parishii A. Gray -- accepted -- Parish's desert larkspur, Parish's larkspur
	Delphinium parryi A. Gray -- accepted -- San Bernardino larkspur
	Delphinium parryi ssp. parryi A. Gray -- accepted -- San Bernardino larkspur
	Delphinium scopulorum A. Gray -- accepted -- Rocky Mountain larkspur
	Delphinium scopulorum auct. non A. Gray -- not accepted -- Rocky Mountain larkspur
	Delphinium scopulorum var. glaucum (S. Watson) A. Gray -- not accepted
	Delphinium scopulorum var. stachydeum A. Gray -- not accepted
	Delphinium stachydeum (A. Gray) Tidestr. -- accepted -- spiked larkspur
	Delphinium trolliifolium A. Gray -- accepted -- Columbian larkspur
	Delphinium variegatum Torr. & A. Gray -- accepted -- royal larkspur
	Delphinium variegatum ssp. variegatum Torr. & A. Gray -- accepted -- royal larkspur
	Descurainia californica (A. Gray) O.E. Schulz -- accepted -- Sierra tansymustard, Sierran tansy mustard, Sierran tansymustard
	Descurainia incana ssp. incisa (Engelm. ex A. Gray) Kartesz & Gandhi -- not accepted -- mountain tansy mustard, mountain tansymustard
	Descurainia incisa (Engelm. ex A. Gray) Britton -- accepted -- mountain tansymustard
	Descurainia incisa ssp. filipes (A. Gray) Rollins -- not accepted
	Descurainia incisa ssp. incisa (Engelm. ex A. Gray) Britton -- accepted -- mountain tansymustard
	Descurainia incisa var. incisa (Engelm. ex A. Gray) Britton -- not accepted
	Descurainia pinnata ssp. filipes (A. Gray) Detling -- not accepted -- western tansy mustard, western tansymustard
	Descurainia pinnata var. filipes (A. Gray) M. Peck -- not accepted
	Descurainia richardsonii ssp. incisa (Engelm. ex A. Gray) Detling -- not accepted
	Desmanthus leptolobus Torr. & A. Gray -- accepted -- prairie bundleflower, slenderlobe bundleflower
	Desmodium angustifolium var. gramineum (A. Gray) B.G. Schub. -- not accepted
	Desmodium annuum A. Gray -- not accepted
	Desmodium batocaulon A. Gray -- accepted -- San Pedro tick trefoil, San Pedro ticktrefoil
	Desmodium bracteosum var. longifolium (Torr. & A. Gray) B.L. Rob. -- not accepted
	Desmodium canescens var. villosissimum Torr. & A. Gray -- not accepted
	Desmodium cinerascens A. Gray -- accepted -- spiked tick trefoil, spiked ticktrefoil
	Desmodium cuspidatum var. longifolium (Torr. & A. Gray) B.G. Schub. -- accepted -- largebract ticktrefoil
	Desmodium grahamii A. Gray -- accepted -- Graham's tick trefoil, Graham's ticktrefoil
	Desmodium gramineum A. Gray -- accepted -- grass-leaf tick trefoil, grassleaf ticktrefoil
	Desmodium illinoense A. Gray -- accepted -- Illinois tickclover, Illinois ticktrefoil
	Desmodium lineatum var. polymorphum A. Gray -- not accepted
	Desmodium longifolium (Torr. & A. Gray) Smyth -- not accepted
	Desmodium neomexicanum A. Gray -- accepted -- New Mexico tickclover, New Mexico ticktrefoil
	Desmodium paniculatum var. angustifolium Torr. & A. Gray -- not accepted
	Desmodium paniculatum var. pubens Torr. & A. Gray -- not accepted
	Desmodium procumbens var. exiguum (A. Gray) B.G. Schub. -- accepted -- western trailing tick trefoil, western trailing ticktrefoil
	Desmodium psilocarpum A. Gray -- accepted -- Santa Cruz Island tick trefoil, Santa Cruz Island ticktrefoil
	Desmodium sessilifolium (Torr.) Torr. & A. Gray -- accepted -- sessile tickclover, sessileleaf tickclover, sessileleaf ticktrefoil
	Desmodium tenuifolium Torr. & A. Gray -- accepted -- slimleaf ticktrefoil
	Desmodium wislizeni Engelm. ex A. Gray -- not accepted
	Desmodium wrightii A. Gray -- not accepted
	Deyeuxia alopecuroides Nutt. ex A. Gray -- not accepted
	Deyeuxia pickeringii (A. Gray) Vasey -- not accepted
	Deyeuxia porteri (A. Gray) Vasey -- not accepted
	Dianthera humilis (Michx.) Engelm. & A. Gray -- not accepted
	Dianthera parviflora (Buckley) A. Gray -- not accepted
	Dianthera parvifolia (Torr.) A. Gray -- not accepted
	Diapedium torreyi (A. Gray) A. Heller -- not accepted
	Diaperia candida (Torr. & A. Gray) Benth. -- accepted -- silver pygmycudweed
	Diaperia drummondii (Torr. & A. Gray) Benth. -- not accepted
	Diaperia verna var. drummondii (Torr. & A. Gray) Morefield -- accepted -- spring pygmycudweed
	Dichaetophora A. Gray -- accepted -- dichaetophora
	Dichaetophora campestris A. Gray -- accepted -- plainsdaisy
	Dichanthelium acuminatum var. villosum (A. Gray) Gould & C.A. Clark -- not accepted
	Dichanthelium xanthophysum (A. Gray) Freckmann -- accepted -- slender rosette grass
	Dichrophyllum bicolor (Engelm. & A. Gray) Klotzsch & Garcke -- not accepted
	Dicliptera brachiata var. attenuata A. Gray -- not accepted
	Dicliptera pseudoverticillaris A. Gray -- not accepted
	Dicliptera torreyi A. Gray -- not accepted
	Dicoria Torr. ex A. Gray -- accepted -- dicoria, twinbugs
	Dicoria brandegeei A. Gray -- not accepted
	Dicoria canescens A. Gray -- accepted -- desert twinbugs
	Dicoria canescens ssp. brandegeei (A. Gray) Kartesz -- not accepted -- Brandegee's twinbugs, desert twinbugs
	Dicoria canescens ssp. canescens A. Gray -- not accepted -- desert twinbugs
	Dicoria canescens var. brandegeei (A. Gray) Cronquist -- not accepted
	Dicranocarpus A. Gray -- accepted -- dicranocarpus
	Dicranocarpus parviflorus A. Gray -- accepted -- pitchfork
	Dicranostegia (A. Gray) Pennell -- accepted
	Dicranostegia orcuttiana (A. Gray) Pennell -- accepted -- Orcutt's bird's-beak
	Didymoglossum petersii (A. Gray) Copel. -- accepted -- dwarf bristle fern
	Dieteria bigelovii (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted
	Dieteria bigelovii var. bigelovii (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted
	Dieteria canescens var. glabra (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted -- hoary tansyaster
	Dieteria canescens var. shastensis (A. Gray) D.R. Morgan & R.L. Hartm. -- accepted
	Dieteria incana (Lindl.) Torr. & A. Gray -- not accepted
	Dimeresia A. Gray -- accepted -- dimeresia
	Dimeresia howellii A. Gray -- accepted -- doublet
	Dimersia A. Gray -- not accepted
	Dimersia howelli A. Gray -- not accepted
	Dioclea multiflora (Torr. & A. Gray) C. Mohr -- accepted -- Boykin's clusterpea
	Diodia teres var. angustata A. Gray -- not accepted -- poor joe, poorjoe
	Diodia tricocca Torr. & A. Gray -- not accepted
	Diodia virginiana var. latifolia Torr. & A. Gray -- accepted -- Virginia buttonweed
	Diphysa thurberi (A. Gray) Rydb. ex Standl. -- accepted -- Thurber's diphysa
	Diplostelma bellioides A. Gray -- not accepted
	Dipteracanthus linearis Torr. & A. Gray -- not accepted
	Dipteracanthus micranthus Engelm. & A. Gray -- not accepted
	Dipteracanthus nudiflorus Engelm. & A. Gray -- not accepted
	Dirca occidentalis A. Gray -- accepted -- western leatherwood
	Discanthera dissecta Torr. & A. Gray -- not accepted
	Disella lepidota (A. Gray) Greene -- not accepted
	Disella sagittifolia (A. Gray) Greene -- not accepted
	Ditaxis adenophora auct. non (A. Gray) Pax & K. Hoffm. -- not accepted
	Ditaxis adenophora (A. Gray) Pax & K. Hoffm. -- accepted -- glandular silverbush
	Ditaxis humilis (Engelm. & A. Gray) Pax -- accepted -- low silverbush
	Dodecahema leptoceras (A. Gray) Reveal & Hardham -- accepted -- slender-horned spineflower, slenderhorn spineflower
	Dodecatheon alpinum (A. Gray) Greene -- not accepted -- alpine shootingstar
	Dodecatheon alpinum ssp. alpinum (A. Gray) Greene -- not accepted -- alpine shootingstar
	Dodecatheon hendersonii A. Gray -- not accepted -- mosquito bills
	Dodecatheon hendersonii ssp. hendersonii A. Gray -- not accepted -- mosquito bills
	Dodecatheon pulchellum ssp. macrocarpum (A. Gray) Roy L. Taylor & MacBryde -- not accepted -- darkthroat shootingstar
	Dodecatheon pulchellum var. macrocarpum (A. Gray) Reveal -- not accepted -- darkthroat shootingstar
	Doellingeria umbellata ssp. pubens (A. Gray) �. L�ve & D. L�ve -- not accepted
	Doellingeria umbellata var. latifolia (A. Gray) House -- not accepted
	Doellingeria umbellata var. pubens (A. Gray) Britton -- accepted -- parasol whitetop
	Dolicholus latifolius (Nutt. ex Torr. & A. Gray) Vail -- not accepted
	Douglasia laevigata A. Gray -- not accepted -- cliff dwarf-primrose
	Douglasia laevigata var. laevigata A. Gray -- not accepted -- cliff dwarf-primrose
	Douglasia montana A. Gray -- not accepted -- Rocky Mountain dwarf-primrose
	Douglasia nivalis var. dentata (S. Watson) A. Gray -- not accepted -- snow dwarf-primrose
	Downingia bicornuta A. Gray -- accepted -- double-horned downingia, doublehorn calicoflower
	Downingia bicornuta var. bicornuta A. Gray -- accepted -- doublehorn calicoflower
	Downingia elegans var. corymbosa (A. DC.) A. Gray -- not accepted
	Draba brachycarpa Nutt. ex Torr. & A. Gray -- accepted -- short-pod whitlowgrass, shortfruited draba, shortpod draba
	Draba cuneifolia Nutt. ex Torr. & A. Gray -- accepted -- wedgeleaf draba, wedgeleaf whitlowgrass
	Draba cuneifolia var. cuneifolia Nutt. ex Torr. & A. Gray -- accepted -- wedgeleaf draba, wedgeleaf whitlowgrass
	Draba cuneifolia var. platycarpa (Torr. & A. Gray) S. Watson -- not accepted
	Draba douglasii A. Gray -- not accepted
	Draba douglasii var. douglasii A. Gray -- not accepted
	Draba eurycarpa A. Gray -- not accepted
	Draba platycarpa Torr. & A. Gray -- accepted -- broad-pod whitlowgrass, broadpod draba, broadpod whitlowgrass
	Draba streptocarpa A. Gray -- accepted -- pretty draba, pretty whitlowgrass
	Draba ventosa A. Gray -- accepted -- wind draba, Wind River draba
	Draperia systula (A. Gray) Torr. -- not accepted
	Draperia systyla (A. Gray) Torr. -- accepted -- violet draperia
	Drymaria effusa A. Gray -- accepted -- pinewoods drymary
	Drymaria effusa var. effusa A. Gray -- accepted -- pinewoods drymary
	Drymaria sperguloides A. Gray -- not accepted
	Drymaria tenella A. Gray -- not accepted
	Dryopetalon A. Gray -- accepted
	Dryopetalon runcinatum A. Gray -- accepted -- rock-mustard, rockmustard
	Dryopteris cristata (L.) A. Gray -- accepted -- crested woodfern
	Dryopteris dilatata auct. non (Hoffm.) A. Gray -- not accepted
	Dryopteris goldiana (Hook. ex Goldie) A. Gray -- accepted -- Goldie's woodfern
	Dryopteris intermedia (Muhl. ex Willd.) A. Gray -- accepted -- intermediate woodfern
	Dryopteris marginalis (L.) A. Gray -- accepted -- marginal woodfern, woodfern
	Dryopteris noveboracensis (L.) A. Gray -- not accepted
	Dubautia arborea (A. Gray) D.D. Keck -- accepted -- Mauna Kea dubautia
	Dubautia ciliolata var. juniperoides (A. Gray) D.D. Keck -- not accepted
	Dubautia laevigata A. Gray -- accepted -- smooth dubautia
	Dubautia latifolia (A. Gray) D.D. Keck -- accepted -- koholapehu, na`ena`e
	Dubautia menziesii (A. Gray) D.D. Keck -- accepted -- mountain dubautia
	Dubautia paleata A. Gray -- accepted -- na`ena`e pua kea
	Dubautia platyphylla (A. Gray) D.D. Keck -- accepted -- cinderslope dubautia
	Dubautia scabra ssp. leiophylla (A. Gray) G.D. Carr -- accepted -- rough dubautia
	Dubautia scabra var. leiophylla (A. Gray) D.D. Keck -- not accepted
	Dubautia struthioloides (A. Gray) D.D. Keck -- not accepted
	Dugaldia hoopesii (A. Gray) Rydb. -- not accepted
	Dupontia cooleyi A. Gray -- not accepted
	Dyschoriste angusta (A. Gray) Small -- accepted -- pineland snakeherb
	Dyschoriste decumbens (A. Gray) Kuntze -- not accepted -- spreading snakeherb
	Dyschoriste linearis (Torr. & A. Gray) Kuntze -- accepted -- narrowleaf dyschoriste, polkadots
	Dyschoriste linearis var. linearis (Torr. & A. Gray) Kuntze -- accepted -- polkadots
	Dyschoriste oblongifolia var. angusta (A. Gray) R.W. Long -- not accepted
	Dyschoriste schiedeana var. decumbens (A. Gray) Henrickson -- accepted -- spreading snakeherb
	Dysodiopsis (A. Gray) Rydb. -- accepted -- dogfennel
	Dysodiopsis tagetoides (Torr. & A. Gray) Rydb. -- accepted -- false dogfennel, marygold dogweed
	Dyssodia aurea (A. Gray) A. Nelson -- not accepted
	Dyssodia aurea var. polychaeta (A. Gray) M.C. Johnst. -- not accepted
	Dyssodia concinna (A. Gray) B.L. Rob. -- not accepted
	Dyssodia cooperi A. Gray -- not accepted
	Dyssodia hartwegii (A. Gray) B.L. Rob. -- not accepted
	Dyssodia neomexicana (A. Gray) B.L. Rob. -- not accepted
	Dyssodia pentachaeta ssp. hartwegii (A. Gray) Strother -- not accepted
	Dyssodia pentachaeta var. hartwegii (A. Gray) Strother -- not accepted
	Dyssodia polychaeta (A. Gray) B.L. Rob. -- not accepted
	Dyssodia porophylloides A. Gray -- not accepted
	Dyssodia setifolia var. greggii (A. Gray) M.C. Johnst. -- not accepted
	Dyssodia setifolia var. radiata (A. Gray) Strother -- not accepted
	Dyssodia tagetoides Torr. & A. Gray -- not accepted
	Dyssodia tenuiloba ssp. wrightii (A. Gray) Strother -- not accepted
	Dyssodia tenuiloba var. treculii (A. Gray) Strother -- not accepted
	Dyssodia thurberi (A. Gray) B.L. Rob. -- not accepted
	Dyssodia treculii (A. Gray) B.L. Rob. -- not accepted
	Dyssodia wrightii (A. Gray) B.L. Rob. -- not accepted
	Eatonella A. Gray -- accepted -- eatonella
	Eatonella congdonii A. Gray -- not accepted
	Eatonella nivea (D.C. Eaton) A. Gray -- accepted -- white eatonella, white false tickhead
	Eatonia obtusata (Michx.) A. Gray -- not accepted
	Eatonia pensylvanica (Spreng.) A. Gray -- not accepted
	Eatonia pensylvanica var. major (Torr.) A. Gray -- not accepted
	Eburophyton austiniae (A. Gray) A. Heller -- not accepted
	Echeveria strictiflora A. Gray -- accepted -- desert savior
	Echidiocarya californica A. Gray -- not accepted
	Echidiocarya californica var. ursina (A. Gray) Jeps. -- not accepted
	Echinocactus viridescens Torr. & A. Gray -- not accepted
	Echinocereus triglochidiatus var. melanacanthus (Engelm. ex A. Gray) L.D. Benson -- not accepted
	Echinocystis Torr. & A. Gray -- accepted
	Echinocystis lobata (Michx.) Torr. & A. Gray -- accepted -- concombre grimpant, wild balsam apple, wild cucumber, wild mock-cucumber, wild mockcucumber
	Echinocystis oregana (Torr. & A. Gray) Cogn. -- not accepted
	Echinocystis wrightii (A. Gray) Cogn. -- not accepted
	Echinodorus Rich. & Engelm. ex A. Gray -- accepted -- burhead
	Echinopepon coulteri (A. Gray) Rose -- accepted -- Coulter's balsam apple, Coulter's wild balsam apple
	Echinopepon wrightii (A. Gray) S. Watson -- accepted -- wild balsam apple, wild balsam-apple
	Eddya hispidissima Torr. & A. Gray -- not accepted
	Elaphrium microphylla (A. Gray) Rose -- not accepted
	Elaterium coulteri A. Gray -- not accepted
	Elaterium wrightii A. Gray -- not accepted
	Elatine brachysperma A. Gray -- accepted -- short-seed waterwort, shortseed waterwort
	Elatine californica A. Gray -- accepted -- California waterwort
	Elatine texana (Hook.) Torr. & A. Gray -- not accepted
	Elatine triandra var. brachysperma (A. Gray) Fassett -- not accepted
	Eleocharis bolanderi A. Gray -- accepted -- Bolander's spikerush
	Eleocharis montevidensis var. bolanderi (A. Gray) V.E. Grant -- not accepted
	Eleocharis obtusa var. detonsa (A. Gray) Drapalik & Mohlenbr. -- not accepted
	Eleocharis ovata var. detonsa (A. Gray) Mohlenbr. -- not accepted
	Eleocharis wolfii (A. Gray) A. Gray ex Britton -- accepted -- wolf's spike-rush, Wolf's spikerush
	Elephantella attollens (A. Gray) A. Heller -- not accepted
	Elephantopus nudatus A. Gray -- accepted -- naked elephantfoot, smooth elephantsfoot
	Elymus striatus var. villosus (Muhl. ex Willd.) A. Gray -- not accepted
	Encelia farinosa A. Gray ex Torr. -- accepted -- brittlebush, goldenhills, white brittlebush
	Encelia farinosa var. farinosa A. Gray ex Torr. -- not accepted -- goldenhills
	Encelia frutescens (A. Gray) A. Gray -- accepted -- bush encelia, button brittlebush
	Encelia frutescens var. frutescens (A. Gray) A. Gray -- not accepted -- bush encelia, button brittlebush
	Encelia microcephala A. Gray -- not accepted
	Encelia nudicaulis A. Gray -- not accepted
	Encelia scaposa (A. Gray) A. Gray -- accepted -- onehead brittlebush, Scouler's silene
	Enceliopsis (A. Gray) A. Nelson -- accepted -- sunray
	Enceliopsis nudicaulis (A. Gray) A. Nelson -- accepted -- nakedstem sunray
	Enceliopsis nudicaulis var. nudicaulis (A. Gray) A. Nelson -- not accepted -- nakedstem sunray
	Enemion hallii (A. Gray) J.R. Drumm. & Hutch. -- accepted -- Willamette false rue anemone
	Enemion stipitatum (A. Gray) J.R. Drumm. & Hutch. -- accepted -- Siskiyou false rue anemone
	Engelmannia A. Gray ex Nutt. -- accepted -- Engelmann's daisy, engelmannia
	Engelmannia pinnatifida A. Gray ex Nutt. -- not accepted -- Engelmann's daisy
	Epilobium foliosum (Torr. & A. Gray) Suksd. -- accepted -- California willowherb, leafy willowherb
	Epilobium minutum var. foliosum Torr. & A. Gray -- not accepted
	Epilobium obcordatum A. Gray -- accepted -- rockfringe, rose willowweed
	Epilobium paniculatum Nutt. ex Torr. & A. Gray -- not accepted
	Epilobium paniculatum var. juncundum (A. Gray) Trel. -- not accepted
	Epilobium paniculatum var. paniculatum Nutt. ex Torr. & A. Gray -- not accepted
	Epixiphium (Engelm. ex A. Gray) Munz -- accepted
	Epixiphium wislizeni (Engelm. ex A. Gray) Munz -- accepted -- balloonbush
	Eragrostis brevipedicellata A. Gray -- not accepted
	Eragrostis pectinacea var. spectabilis (Pursh) A. Gray -- not accepted
	Eragrostis poaeoides var. megastachya (Koeler) A. Gray -- not accepted
	Eragrostis purshii Schrad. ex A. Gray -- not accepted
	Eragrostis tenuis A. Gray -- not accepted
	Eremalche exilis (A. Gray) Greene -- accepted -- white mallow, white-mallow
	Eremalche rotundifolia (A. Gray) Greene -- accepted -- desert five-spot, desert fivespot
	Eremocarya micrantha var. lepida (A. Gray) J.F. Macbr. -- not accepted
	Eremogone congesta var. suffrutescens (A. Gray) R.L. Hartm. & Rabeler -- accepted -- suffrutescent sandwort
	Eremogone fendleri (A. Gray) Ikonn. -- accepted -- Fendler's sandwort
	Eremothera chamaenerioides (A. Gray) W.L. Wagner & Hoch -- accepted -- longcapsule suncup
	Eriastrum diffusum (A. Gray) H. Mason -- accepted -- diffuse eriastrum, diffuse woolstar, miniature woollystar, miniature woolstar
	Ericameria albida (M.E. Jones ex A. Gray) L.C. Anderson -- accepted -- whiteflower rabbitbrush
	Ericameria arborescens (A. Gray) Greene -- accepted -- goldenfleece
	Ericameria bloomeri (A. Gray) J.F. Macbr. -- accepted -- Bloomer's goldenbush, rabbitbush
	Ericameria brachylepis (A. Gray) H.M. Hall -- accepted -- chaparral goldenbush
	Ericameria cooperi (A. Gray) H.M. Hall -- accepted -- Cooper's goldenbush, goldenbush
	Ericameria cooperi var. cooperi (A. Gray) H.M. Hall -- not accepted
	Ericameria cuneata (A. Gray) McClatchie -- accepted -- cliff goldenbush, cliff heath-goldenrod, cliff heathgoldenrod
	Ericameria cuneata var. cuneata (A. Gray) McClatchie -- accepted -- cliff goldenbush
	Ericameria cuneata var. spathulata (A. Gray) H.M. Hall -- accepted -- cliff goldenbush, cliff heathgoldenrod
	Ericameria greenei (A. Gray) G.L. Nesom -- accepted -- Greene's goldenbush, slender goldenrod
	Ericameria laricifolia (A. Gray) Shinners -- accepted -- ericameria, turpentine bush, turpentinebush
	Ericameria nauseosa ssp. consimilis var. leiosperma (A. Gray) G.L. Nesom & Baird -- not accepted
	Ericameria nauseosa ssp. nauseosa var. bigelovii (A. Gray) G.L. Nesom & Baird -- not accepted -- Bigelow rubber rabbitbrush
	Ericameria nauseosa ssp. nauseosa var. glabrata (A. Gray) G.L. Nesom & Baird -- not accepted -- green rubber rabbitbrush, rubber rabbitbrush
	Ericameria nauseosa ssp. nauseosa var. hololeuca (A. Gray) G.L. Nesom & Baird -- not accepted
	Ericameria nauseosa ssp. nauseosa var. latisquamea (A. Gray) G.L. Nesom & Baird -- not accepted
	Ericameria nauseosa var. bigelovii (A. Gray) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
	Ericameria nauseosa var. glabrata (A. Gray) G.L. Nesom & Baird -- not accepted -- rubber rabbitbrush
	Ericameria nauseosa var. hololeuca (A. Gray) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
	Ericameria nauseosa var. latisquamea (A. Gray) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
	Ericameria nauseosa var. leiosperma (A. Gray) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
	Ericameria palmeri (A. Gray) H.M. Hall -- accepted -- Palmer's goldenbush
	Ericameria palmeri var. palmeri (A. Gray) H.M. Hall -- accepted -- Palmer's rabbitbrush
	Ericameria paniculata (A. Gray) Rydb. -- accepted -- desert rabbitbrush, Mojave rabbitbrush
	Ericameria parryi (A. Gray) G.L. Nesom & Baird -- accepted -- Parry's goldenbush, Parry's rabbitbrush
	Ericameria parryi var. howardii (Parry ex A. Gray) G.L. Nesom & Baird -- accepted -- Parry's rabbitbrush
	Ericameria parryi var. nevadensis (A. Gray) G.L. Nesom & Baird -- accepted -- Parry's rabbitbrush
	Ericameria parryi var. parryi (A. Gray) G.L. Nesom & Baird -- accepted -- green rabbitbrush, Parry's rabbitbrush
	Ericameria pinifolia (A. Gray) H.M. Hall -- accepted -- pinebush
	Ericameria pulchella (A. Gray) L.C. Anderson -- not accepted
	Ericameria vaseyi (A. Gray) L.C. Anderson -- not accepted
	Ericameria viscidiflora var. stenophylla (A. Gray) L.C. Anderson -- not accepted
	Ericameria watsonii (A. Gray) G.L. Nesom -- accepted -- Watson's goldenbush, Watson's heath-goldenrod
	Ericameria X bolanderi (A. Gray) G.L. Nesom & Baird -- accepted
	Erigeron acris ssp. debilis (A. Gray) Piper -- not accepted -- bitter fleabane
	Erigeron acris var. debilis A. Gray -- not accepted
	Erigeron andersonii A. Gray -- not accepted
	Erigeron angulosus ssp. debilis (A. Gray) Piper -- not accepted
	Erigeron aphanactis (A. Gray) Greene -- accepted -- beach daisy, rayless shaggy fleabane
	Erigeron aphanactis var. aphanactis (A. Gray) Greene -- accepted -- rayless shaggy daisy, rayless shaggy fleabane
	Erigeron arenarioides (D.C. Eaton ex A. Gray) A. Gray ex Rydb. -- accepted -- sand fleabane
	Erigeron argentatus A. Gray -- accepted -- silver fleabane, silvery daisy
	Erigeron arizonicus A. Gray -- accepted -- Arizona fleabane
	Erigeron asperugineus (D.C. Eaton) A. Gray -- accepted -- Idaho daisy, Idaho fleabane
	Erigeron bigelovii A. Gray -- accepted -- Bigelow's fleabane
	Erigeron biglovii A. Gray -- not accepted
	Erigeron bloomeri A. Gray -- accepted -- Bloomer's daisy, scabland fleabane
	Erigeron bloomeri var. bloomeri A. Gray -- accepted -- scabland daisy, scabland fleabane
	Erigeron bloomeri var. nudatus (A. Gray) Cronquist -- accepted -- scabland fleabane
	Erigeron brandegeei A. Gray -- not accepted
	Erigeron breweri A. Gray -- accepted -- Brewer's daisy, Brewer's fleabane
	Erigeron breweri var. breweri A. Gray -- accepted -- Brewer's daisy, Brewer's fleabane
	Erigeron canadensis var. glabratus A. Gray -- not accepted
	Erigeron canus A. Gray -- accepted -- hoary fleabane
	Erigeron chrysopsidis A. Gray -- accepted -- dwarf yellow fleabane
	Erigeron chrysopsidis ssp. chrysopsidis A. Gray -- not accepted -- dwarf yellow fleabane
	Erigeron chrysopsidis var. chrysopsidis A. Gray -- accepted -- dwarf yellow fleabane
	Erigeron compositus var. discoideus A. Gray -- not accepted
	Erigeron compositus var. pinnatisectus A. Gray -- not accepted
	Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray -- accepted -- hairy daisy, Navajo fleabane
	Erigeron concinnus var. aphanactis A. Gray -- not accepted
	Erigeron concinnus var. concinnus (Hook. & Arn.) Torr. & A. Gray -- accepted -- Navajo daisy, Navajo fleabane
	Erigeron debilis (A. Gray) Rydb. -- not accepted
	Erigeron delphiniifolius ssp. neomexicanus (A. Gray) Cronquist -- not accepted
	Erigeron divergens Torr. & A. Gray -- accepted -- spreading daisy, spreading fleabane
	Erigeron divergens var. cinereus A. Gray -- not accepted
	Erigeron eatonii A. Gray -- accepted -- Eaton's daisy, Eaton's fleabane
	Erigeron eatonii var. eatonii A. Gray -- accepted -- Eaton's daisy, Eaton's fleabane
	Erigeron elatior (A. Gray) Greene -- accepted -- tall fleabane
	Erigeron eriophyllis A. Gray -- not accepted
	Erigeron eriophyllus A. Gray -- not accepted
	Erigeron flagellaris A. Gray -- accepted -- trailing daisy, trailing fleabane
	Erigeron foliosus var. stenophyllus (Nutt.) A. Gray -- not accepted
	Erigeron glabellus var. mollis A. Gray -- not accepted
	Erigeron grandiflorus ssp. muirii (A. Gray) Hult�n -- not accepted
	Erigeron grandiflorus var. elatior A. Gray -- not accepted
	Erigeron howellii A. Gray -- accepted -- Howell's fleabane
	Erigeron inornatus (A. Gray) A. Gray -- accepted -- California rayless fleabane, rayless daisy
	Erigeron inornatus var. angustatus A. Gray -- not accepted
	Erigeron inornatus var. inornatus (A. Gray) A. Gray -- accepted -- California rayless daisy, California rayless fleabane
	Erigeron inornatus var. viscidulus A. Gray -- not accepted
	Erigeron leiomerus A. Gray -- accepted -- glaber daisy, rockslide yellow fleabane
	Erigeron lemmonii A. Gray -- accepted -- Lemmon fleabane, Lemmon's fleabane
	Erigeron miser A. Gray -- accepted -- starved fleabane
	Erigeron modestus A. Gray -- accepted -- plains fleabane
	Erigeron muirii A. Gray -- accepted -- Muir's fleabane
	Erigeron neomexicanus A. Gray -- accepted -- New Mexico fleabane, oakbelt daisy
	Erigeron oreganus A. Gray -- accepted -- gorge fleabane
	Erigeron parishii A. Gray -- accepted -- Parish's daisy, Parish's fleabane
	Erigeron peregrinus ssp. callianthemus var. angustifolius (A. Gray) Cronquist -- not accepted -- subalpine fleabane
	Erigeron peregrinus ssp. callianthemus var. scaposus (Torr. & A. Gray) Cronquist -- not accepted -- subalpine fleabane
	Erigeron peregrinus var. angustifolius (A. Gray) Cronquist -- not accepted
	Erigeron peregrinus var. scaposus (Torr. & A. Gray) Cronquist -- not accepted
	Erigeron petrophilus var. viscidulus (A. Gray) G.L. Nesom -- accepted -- rockloving erigeron
	Erigeron peucephyllus A. Gray -- not accepted
	Erigeron pinnatisectus (A. Gray) A. Nelson -- accepted -- featherleaf fleabane
	Erigeron poliospermus A. Gray -- accepted -- purple cushion fleabane
	Erigeron poliospermus var. poliospermus A. Gray -- accepted -- purple cushion fleabane
	Erigeron pringlei A. Gray -- accepted -- Pringle's fleabane
	Erigeron pygmaeus (A. Gray) Greene -- accepted -- dwarf daisy, pygmy fleabane
	Erigeron ramosus var. beyrichii (Fisch. & C.A. Mey.) A. Gray -- not accepted
	Erigeron reductus var. angustatus (A. Gray) G.L. Nesom -- accepted -- lesser California rayless fleabane
	Erigeron repens A. Gray -- not accepted
	Erigeron rusbyi A. Gray -- not accepted
	Erigeron speciosus var. mollis (A. Gray) S.L. Welsh -- not accepted
	Erigeron strigosus var. beyrichii (Fisch. & C.A. Mey.) Torr. & A. Gray ex A. Gray -- not accepted -- Beyrich's fleabane
	Erigeron strigosus var. discoideus Robbins ex A. Gray -- not accepted
	Erigeron supplex A. Gray -- accepted -- supple fleabane
	Erigeron tener (A. Gray) A. Gray -- accepted -- slender daisy, slender fleabane
	Erigeron tenuis Torr. & A. Gray -- accepted -- slender fleabane, slenderleaf fleabane
	Erigeron thunbergii A. Gray -- accepted
	Erigeron thunbergii ssp. glabratus A. Gray -- accepted
	Erigeron thunbergii var. glabratus A. Gray -- not accepted
	Erigeron utahensis A. Gray -- accepted -- Utah fleabane
	Erigeron utahensis var. tetrapleuris (A. Gray) Cronquist -- not accepted
	Erigeron utahensis var. utahensis A. Gray -- accepted -- Utah fleabane
	Erigeron vernus (L.) Torr. & A. Gray -- accepted -- early whitetop fleabane
	Erigeron watsonii (A. Gray) Cronquist -- accepted -- Watson's daisy, Watson's fleabane
	Eriocarpum coloradoense (A. Gray) Greene -- not accepted
	Eriogonella leptoceras (A. Gray) Goodman -- not accepted
	Eriogonum brachypodum Torr. & A. Gray -- accepted -- Parry's buckwheat, Parry's wild buckwheat
	Eriogonum brevicaule var. laxifolium (Torr. & A. Gray) Reveal -- accepted -- goldenball eriogonum, shortstem buckwheat
	Eriogonum cernuum ssp. tenue (Torr. & A. Gray) S. Stokes -- not accepted
	Eriogonum cernuum var. tenue Torr. & A. Gray -- not accepted
	Eriogonum chrysocephalum A. Gray -- not accepted
	Eriogonum corymbosum var. divaricatum Torr. & A. Gray -- not accepted
	Eriogonum dasyanthemum Torr. & A. Gray -- accepted -- chaparral buckwheat
	Eriogonum deflexum ssp. watsonii (Torr. & A. Gray) S. Stokes -- not accepted
	Eriogonum deflexum var. brachypodum (Torr. & A. Gray) Munz -- not accepted
	Eriogonum deflexum var. watsonii (Torr. & A. Gray) R.J. Davis -- not accepted
	Eriogonum ericifolium Torr. & A. Gray -- accepted -- Yavapai buckwheat, Yavapai County buckwheat
	Eriogonum ericifolium var. ericifolium Torr. & A. Gray -- not accepted -- Yavapai buckwheat, Yavapai County buckwheat
	Eriogonum fasciculatum var. polifolium (Benth.) Torr. & A. Gray -- accepted -- Eastern Mojave buckwheat, flattop buckwheat, Mojave buckwheat
	Eriogonum greggii Torr. & A. Gray -- accepted -- Gregg's buckwheat
	Eriogonum heracleoides var. angustifolium (Nutt.) Torr. & A. Gray -- not accepted -- parsnipflower buckwheat
	Eriogonum hirtiflorum A. Gray ex S. Watson -- accepted -- hairyflower buckwheat
	Eriogonum incanum Torr. & A. Gray -- accepted -- frosted buckwheat
	Eriogonum kelloggii A. Gray -- accepted -- Red Mountain buckwheat
	Eriogonum kingii Torr. & A. Gray -- accepted -- Ruby Mountain buckwheat
	Eriogonum leptocladon Torr. & A. Gray -- accepted -- fine branched buckwheat, sand buckwheat
	Eriogonum leptocladon var. leptocladon Torr. & A. Gray -- accepted -- sand buckwheat
	Eriogonum leptophyllum (Torr. & A. Gray) Wooton & Standl. -- accepted -- slender-leaf buckwheat, slenderleaf buckwheat
	Eriogonum lobbii Torr. & A. Gray -- accepted -- granite buckwheat, Lobb's buckwheat
	Eriogonum lobbii var. lobbii Torr. & A. Gray -- not accepted -- Lobb's buckwheat
	Eriogonum lonchophyllum Torr. & A. Gray -- accepted -- spearleaf buckwheat, spreading wild buckwheat
	Eriogonum lonchophyllum var. lonchophyllum Torr. & A. Gray -- not accepted -- spearleaf buckwheat
	Eriogonum longifolium var. plantagineum Engelm. & A. Gray -- not accepted
	Eriogonum marifolium Torr. & A. Gray -- accepted -- marumleaf buckwheat
	Eriogonum marifolium var. incanum (Torr. & A. Gray) M.E. Jones -- not accepted
	Eriogonum marifolium var. marifolium Torr. & A. Gray -- accepted -- marumleaf buckwheat
	Eriogonum microthecum var. confertiflorum (Benth.) Torr. & A. Gray -- not accepted
	Eriogonum microthecum var. effusum (Nutt.) Torr. & A. Gray -- not accepted
	Eriogonum microthecum var. foliosum (Torr. & A. Gray) Reveal -- not accepted
	Eriogonum niveum var. decumbens (Benth.) Torr. & A. Gray -- not accepted
	Eriogonum nutans Torr. & A. Gray -- accepted -- drooping buckwheat, Dugway buckwheat
	Eriogonum nutans var. nutans Torr. & A. Gray -- accepted -- Dugway buckwheat
	Eriogonum parryi A. Gray -- not accepted
	Eriogonum proliferum Torr. & A. Gray -- not accepted
	Eriogonum pusillum Torr. & A. Gray -- accepted -- puny buckwheat, yellow-turbans, yellowturbans
	Eriogonum pyrolifolium var. coryphaeum Torr. & A. Gray -- accepted -- Shasta buckwheat
	Eriogonum reniforme ssp. pusillum (Torr. & A. Gray) S. Stokes -- not accepted
	Eriogonum spathulatum A. Gray -- accepted -- spoonleaf buckwheat
	Eriogonum spergulinum A. Gray -- accepted -- spurry buckwheat
	Eriogonum spergulinum var. spergulinum A. Gray -- accepted -- spurry buckwheat
	Eriogonum strictum ssp. proliferum (Torr. & A. Gray) S. Stokes -- not accepted -- Blue Mountain buckwheat
	Eriogonum strictum ssp. proliferum var. greenei (A. Gray) Reveal -- not accepted -- Greene's buckwheat
	Eriogonum strictum ssp. proliferum var. proliferum (Torr. & A. Gray) C.L. Hitchc. -- not accepted -- Blue Mountain buckwheat
	Eriogonum strictum var. greenei (A. Gray) Reveal -- accepted -- Greene's buckwheat
	Eriogonum strictum var. proliferum (Torr. & A. Gray) C.L. Hitchc. -- accepted -- Blue Mountain buckwheat
	Eriogonum tenellum var. caulescens Torr. & A. Gray -- not accepted
	Eriogonum torreyanum A. Gray -- not accepted
	Eriogonum truncatum Torr. & A. Gray -- accepted -- Contra Costa buckwheat, Mt. Diablo buckwheat
	Eriogonum umbellatum ssp. bahiiforme (Torr. & A. Gray) Munz -- not accepted
	Eriogonum umbellatum var. bahiiforme (Torr. & A. Gray) Jeps. -- accepted -- sulphur-flower buckwheat
	Eriogonum umbellatum var. monocephalum Torr. & A. Gray -- not accepted
	Eriogonum umbellatum var. torreyanum (A. Gray) M.E. Jones -- accepted -- Donner Pass buckwheat
	Eriogonum villiflorum A. Gray -- accepted -- dairyflower buckwheat, gray buckwheat
	Eriogonum watsonii Torr. & A. Gray -- accepted -- Watson's buckwheat
	Eriophorum crinigerum (A. Gray) Beetle -- accepted -- fringed cottongrass
	Eriophyllum ambiguum (A. Gray) A. Gray -- accepted -- beautiful woolly sunflower, beautiful woollysunflower
	Eriophyllum ambiguum var. ambiguum (A. Gray) A. Gray -- accepted -- beautiful woolly sunflower
	Eriophyllum confertiflorum (DC.) A. Gray -- accepted -- golden-yarrow, yellow-yarrow
	Eriophyllum confertiflorum var. confertiflorum (DC.) A. Gray -- accepted -- golden-yarrow
	Eriophyllum confertiflorum var. laxiflorum A. Gray -- not accepted
	Eriophyllum lanatum var. grandiflorum (A. Gray) Jeps. -- accepted -- common woolly sunflower
	Eriophyllum lanosum (A. Gray) A. Gray -- accepted -- white easterbonnets
	Eriophyllum multicaule (DC.) A. Gray -- accepted -- many-stem woolly-sunflower, manystem woolly sunflower
	Eriophyllum nevinii A. Gray -- not accepted -- Nevin's woolly sunflower
	Eriophyllum nubigenum Greene ex A. Gray -- accepted -- Yosemite woolly sunflower
	Eriophyllum pringlei A. Gray -- accepted -- Pringle's eriophyllum, Pringle's woolly sunflower, wooly sunflower
	Eriophyllum wallacei (A. Gray) A. Gray -- accepted -- woolly easterbonnets
	Eriophyllum wallacei var. rubellum (A. Gray) A. Gray -- not accepted
	Eritrichium holopterum A. Gray -- not accepted
	Eritrichium howardii (A. Gray) Rydb. -- accepted -- Howard's alpine forget-me-not
	Eritrichium oxygonum A. Gray -- not accepted
	Eritrichium pusillum Torr. & A. Gray -- not accepted
	Erodium texanum A. Gray -- accepted -- bull filaree, Texas filaree, Texas fillarie, Texas stork's bill, tufted filaree
	Eryngium aquaticum var. ravenelii (A. Gray) Mathias & Constance -- accepted -- rattlesnakemaster
	Eryngium leavenworthii Torr. & A. Gray -- accepted -- Leavenworth's eryngo
	Eryngium ravenelii A. Gray -- not accepted
	Eryngium synchaetum (A. Gray ex J.M. Coult. & Rose) J.M. Coult. & Rose -- not accepted
	Eryngium wrightii A. Gray -- not accepted
	Eryngium yuccifolium var. synchaetum A. Gray ex J.M. Coult. & Rose -- accepted -- button eryngo
	Erysimum asperum var. arkansanum (Nutt.) A. Gray -- not accepted
	Erysimum drummondii (A. Gray) Kuntze -- not accepted
	Erysimum petiolare (A. Gray) Kuntze -- not accepted
	Erysimum platyspermum (A. Gray) Kuntze -- not accepted
	Erythraea beyrichii Torr. & A. Gray -- not accepted
	Erythraea calycosa var. arizonica A. Gray -- not accepted
	Erythronium propullans A. Gray -- accepted -- Minnesota dwarf trout lily, Minnesota fawnlily, Minnesota trout lily
	Eschenbachia coulteri (A. Gray) Rydb. -- not accepted
	Eschenbachia tenuisecta (A. Gray) Woot. & Standl. -- not accepted
	Eschscholzia caespitosa var. hypecoides (Benth.) A. Gray -- not accepted
	Eschscholzia californica var. douglasii (Benth.) A. Gray -- not accepted
	Eucephalus breweri (A. Gray) G.L. Nesom -- accepted -- Brewer's aster
	Eucephalus glaucescens (A. Gray) Greene -- accepted -- Klickitat aster
	Eucephalus ledophyllus (A. Gray) Greene -- accepted -- Cascade aster
	Eucephalus ledophyllus var. ledophyllus (A. Gray) Greene -- accepted -- Cascade aster
	Eucnide aurea (A. Gray) H.J. Thomps. & W.R. Ernst -- accepted
	Eucnide urens (Parry ex A. Gray) Parry -- accepted -- desert rock nettle, desert stingbush, stingbush
	Eugenia sandwicensis A. Gray -- not accepted
	Eulobus Nutt. ex Torr. & A. Gray -- accepted
	Eulobus californicus Nutt. ex Torr. & A. Gray -- accepted -- California suncup
	Eunanus angustatus (A. Gray) Greene -- not accepted
	Eunanus bicolor A. Gray -- not accepted
	Eunanus bigelovii A. Gray -- not accepted
	Eunanus bolanderi (A. Gray) Greene -- not accepted
	Eunanus coulteri Harv. & A. Gray ex Benth. -- not accepted
	Eunanus coulteri var. angustatus A. Gray -- not accepted
	Eunanus leptaleus (A. Gray) Greene -- not accepted
	Eunanus rattanii (A. Gray) Greene -- not accepted
	Eunanus subsecundus (A. Gray) Greene -- not accepted
	Eunanus torreyi (A. Gray) Greene -- not accepted
	Eupatoriadelphus maculatus var. bruneri (A. Gray) King & H. Rob. -- not accepted
	Eupatorium album var. subvenosum A. Gray -- accepted -- white thoroughwort
	Eupatorium aromaticum var. incisum A. Gray -- not accepted
	Eupatorium bigelovii A. Gray -- not accepted -- Bigelow's thoroughwort
	Eupatorium bruneri A. Gray -- not accepted
	Eupatorium cuneatum (Engelm. ex A. Gray) Engelm. ex Small -- not accepted
	Eupatorium fendleri (A. Gray) A. Gray -- not accepted
	Eupatorium greggii A. Gray -- not accepted -- palmleaf thoroughwort
	Eupatorium herbaceum (A. Gray) Greene -- not accepted
	Eupatorium hyssopifolium var. laciniatum A. Gray -- accepted -- hyssopleaf thoroughwort
	Eupatorium lancifolium (Torr. & A. Gray) Small -- accepted -- lanceleaf thoroughwort
	Eupatorium leucolepis (DC.) Torr. & A. Gray -- accepted -- justiceweed
	Eupatorium leucolepis var. leucolepis (DC.) Torr. & A. Gray -- accepted -- justiceweed
	Eupatorium maculatum ssp. bruneri (A. Gray) G.W. Douglas -- not accepted
	Eupatorium maculatum var. bruneri (A. Gray) Breitung -- not accepted -- spotted joe-pye-weed, spotted joepyeweed
	Eupatorium parryi A. Gray -- not accepted
	Eupatorium pauperculum A. Gray -- not accepted
	Eupatorium perfoliatum var. cuneatum Engelm. ex A. Gray -- not accepted
	Eupatorium perfoliatum var. truncatum (Muhl. ex Willd.) A. Gray -- not accepted
	Eupatorium purpureum var. amoenum (Pursh) A. Gray -- not accepted
	Eupatorium rothrockii A. Gray -- not accepted
	Eupatorium rotundifolium var. scabridum (Elliot) A. Gray -- accepted -- roundleaf thoroughwort
	Eupatorium rugosum var. angustata (A. Gray) S.F. Blake -- not accepted
	Eupatorium semiserratum var. lancifolium Torr. & A. Gray -- not accepted
	Eupatorium solidaginifolium A. Gray -- not accepted -- shrubby thoroughwort
	Eupatorium sonorae A. Gray -- not accepted -- Sonoran thoroughwort
	Eupatorium texense (Torr. & A. Gray) Rydb. -- not accepted
	Eupatorium wrightii A. Gray -- not accepted
	Euphorbia albomarginata Torr. & A. Gray -- accepted -- Rattlesnake weed, white-margin sandmat, white-margin sandwort, whitemargin sandmat
	Euphorbia arenaria Engelm. & A. Gray -- not accepted
	Euphorbia arkansana Engelm. & A. Gray -- not accepted
	Euphorbia bicolor Engelm. & A. Gray -- accepted -- snow on the prairie, snow-on-the-prairie
	Euphorbia bicolor var. concolor Engelm. & A. Gray -- not accepted
	Euphorbia celastroides var. lorifolia (A. Gray ex H. Mann) Sherff -- not accepted -- `ekoko
	Euphorbia commutata Engelm. ex A. Gray -- accepted -- tinted euphorbia, tinted woodland spurge
	Euphorbia darlingtonii A. Gray -- not accepted
	Euphorbia dilatata Torr. & A. Gray -- not accepted
	Euphorbia fendleri Torr. & A. Gray -- accepted -- Fendler's sandmat
	Euphorbia geyeri var. microsperma A. Gray -- not accepted
	Euphorbia guilielmii A. Gray -- not accepted
	Euphorbia humistrata Engelm. ex A. Gray -- accepted -- spreading sandmat
	Euphorbia lorifolia (A. Gray ex H. Mann) Hillebr. -- not accepted
	Euphorbia marginata var. uloleuca Engelm. & A. Gray -- not accepted
	Euphorbia melanadenia Torr. & A. Gray -- accepted -- prostrate spurge, red-gland spurge, squaw sandmat
	Euphorbia multiformis var. celastroides A. Gray -- not accepted
	Euphorbia multiformis var. lorifolia A. Gray ex H. Mann -- not accepted
	Euphorbia multiformis var. tenuior A. Gray ex H. Mann -- not accepted
	Euphorbia remyi A. Gray ex Boiss. -- accepted -- Remy's sandmat
	Euphorbia remyi var. remyi A. Gray ex Boiss. -- accepted -- Remy's sandmat
	Euphorbia wrightii Torr. & A. Gray -- accepted -- Wright's spurge
	Eurya sandwicensis A. Gray -- accepted -- anini
	Eurybia chapmanii (Torr. & A. Gray) G.L. Nesom -- not accepted -- savannah aster
	Eurybia eryngiifolia (Torr. & A. Gray) G.L. Nesom -- accepted -- thistleleaf aster
	Eurybia mirabilis (Torr. & A. Gray) G.L. Nesom -- accepted -- bouquet aster
	Eurybia radulina (A. Gray) G.L. Nesom -- accepted -- roughleaf aster
	Eurybia X herveyi (A. Gray) G.L. Nesom -- accepted
	Eurytaenia Torr. & A. Gray -- accepted -- spreadwing
	Eurytaenia texana Torr. & A. Gray -- accepted -- Texas spreadwing
	Eustylis Engelm. & A. Gray -- not accepted
	Eustylis purpurea (Herb.) Engelm. & A. Gray -- not accepted
	Euthamia leptocephala (Torr. & A. Gray) Greene ex Porter & Britton -- accepted -- bushy goldentop
	Eutrochium maculatum var. bruneri (A. Gray) E.E. Lamont -- accepted -- spotted joepyeweed
	Evax candida (Torr. & A. Gray) A. Gray -- not accepted -- silver evax, silver pygmycudweed
	Evax caulescens var. petiolata A. Gray -- not accepted
	Evax multicaulis var. drummondii (Torr. & A. Gray) A. Gray -- not accepted
	Evax sparsiflora (A. Gray) Jeps. -- not accepted
	Evax sparsiflora var. brevifolia (A. Gray) Jeps. -- not accepted
	Evax verna var. drummondii (Torr. & A. Gray) Kartesz & Gandhi -- not accepted -- spring pygmycudweed
	Evolvulus arizonicus A. Gray -- accepted -- hairy evolvulus, wild dwarf morning-glory, wild dwarf morningglory
	Evolvulus arizonicus var. laetus (A. Gray) Ooststr. -- not accepted
	Evolvulus laetus A. Gray -- not accepted
	Evolvulus sericeus var. discolor (Benth.) A. Gray -- not accepted
	Eysenhardtia orthocarpa (A. Gray) S. Watson -- accepted -- Tahitian kidneywood
	Fagraea berteriana A. Gray ex Benth. -- not accepted
	Fagraea berteroana A. Gray ex Benth. -- accepted
	Falcata pitcheri (Torr. & A. Gray) Kuntze -- not accepted
	Fendlera Engelm. & A. Gray -- accepted -- fendlerbush
	Fendlera rupicola Engelm. & A. Gray -- accepted -- cliff fendlerbush, fendlerbush
	Fendlera rupicola var. rupicola A. Gray -- accepted -- cliff fendlerbush
	Fendlera rupicola var. wrightii A. Gray -- accepted -- Wright's fendlerbush
	Fendlera wrightii (A. Gray) A. Heller -- not accepted -- Wright's fendlerbush
	Ferocactus viridescens (Torr. & A. Gray) Britton & Rose -- accepted -- Biznaga-barril verdosa, coast barrel cactus, San Diego barrel cactus
	Festuca acerosa Trin. ex A. Gray -- not accepted
	Festuca elatior var. pratensis (Huds.) A. Gray -- not accepted
	Festuca macrostachya Torr. & A. Gray -- not accepted
	Festuca microstachys var. ciliata A. Gray -- not accepted
	Festuca microstachys var. ciliata A. Gray ex Beal -- not accepted
	Festuca pacifica var. ciliata (A. Gray) Hoover -- not accepted
	Filaginopsis drummondii Torr. & A. Gray -- not accepted
	Filaginopsis multicaulis (DC.) Torr. & A. Gray -- not accepted
	Filago arizonica A. Gray -- not accepted -- Arizona cottonrose
	Filago candida (Torr. & A. Gray) Shinners -- not accepted
	Filago depressa A. Gray -- not accepted -- dwarf cottonrose, dwarf filago
	Filago verna var. drummondii (Torr. & A. Gray) Shinners -- not accepted
	Fimbristylis capillaris (L.) A. Gray -- not accepted
	Flaveria chlorifolia A. Gray -- accepted -- clasping yellowtops
	Fleischmannia sonorae (A. Gray) King & H. Rob. -- accepted -- Sonoran thoroughwort
	Flourensia pringlei (A. Gray) S.F. Blake -- accepted -- Pringle's tarwort
	Flyriella parryi (A. Gray) King & H. Rob. -- accepted -- Chisos Mountain brickellbush
	Forestiera acuminata var. parviflora A. Gray -- not accepted
	Forestiera neomexicana A. Gray -- not accepted
	Forestiera neomexicana var. arizonica A. Gray -- not accepted
	Forestiera pubescens ssp. neomexicana (A. Gray) E.A. Murray -- not accepted
	Forestiera pubescens var. neomexicana (A. Gray) E.A. Murray -- not accepted
	Forsellesia nevadensis (A. Gray) Greene -- not accepted
	Forsellesia spinescens (A. Gray) Greene -- not accepted
	Fragaria virginiana var. illinoensis A. Gray -- not accepted
	Frangula californica (Eschsch.) A. Gray -- not accepted -- California buckthorn
	Frangula californica ssp. californica (Eschsch.) A. Gray -- not accepted -- California buckthorn
	Frangula caroliniana (Walter) A. Gray -- not accepted -- Carolina buckthorn
	Frangula purshiana (DC.) A. Gray -- not accepted -- Cascara buckthorn, Pursh's buckthorn
	Frankenia grandifolia ssp. campestris (A. Gray) A.E. Murray -- not accepted
	Frankenia grandifolia var. campestris A. Gray -- not accepted
	Frankenia jamesii Torr. ex A. Gray -- accepted -- frank bush, James' seaheath
	Franseria cordifolia A. Gray -- not accepted
	Franseria dumosa A. Gray -- not accepted
	Franseria eriocentra A. Gray -- not accepted
	Franseria ilicifolia A. Gray -- not accepted
	Franseria tomentosa A. Gray -- not accepted
	Franseria tomentosa (Nutt.) A. Nelson, non A. Gray -- not accepted -- bur ragweed
	Frasera albicaulis var. cusickii (A. Gray) C.L. Hitchc. -- accepted -- Cusick's frasera
	Fraxinus americana ssp. texensis (A. Gray) G.N. Mill. -- not accepted
	Fraxinus americana var. microcarpa A. Gray -- not accepted
	Fraxinus americana var. texensis A. Gray -- not accepted
	Fraxinus greggii A. Gray -- accepted -- Gregg's ash
	Fraxinus texensis (A. Gray) Sarg. -- accepted -- Texas ash
	Fugosia drummondii A. Gray -- not accepted
	Funastrum hirtellum (A. Gray) Schltr. -- accepted -- hairy milkweed
	Funastrum torreyi (A. Gray) Schltr. -- accepted -- soft twinevine
	Gaertnera tomentosa (A. Gray) Kuntze -- not accepted
	Gaertneria tenuifolia Harv. & A. Gray -- not accepted
	Gaillardia arizonica A. Gray -- accepted -- Arizona blanketflower, Pringle's blanketflower
	Gaillardia arizonica var. arizonica A. Gray -- not accepted -- Arizona blanketflower
	Gaillardia mexicana auct. non A. Gray -- not accepted
	Gaillardia pulchella var. picta (D. Don) A. Gray -- not accepted -- firewheel
	Gaillardia spathulata A. Gray -- accepted -- western blanketflower
	Gaillardia spatulata A. Gray -- not accepted
	Gaillardia suavis (A. Gray & Engelm.) Britton & Rusby -- accepted -- perfumeballs, sweet gaillardia
	Galactia brachypoda Torr. & A. Gray -- not accepted
	Galactia elliottii var. leavenworthii Torr. & A. Gray -- not accepted
	Galactia floridana Torr. & A. Gray -- accepted -- Florida milkpea
	Galactia heterophylla A. Gray -- accepted -- Gray's milkpea
	Galactia spiciformis Torr. & A. Gray -- not accepted
	Galactia texana (Scheele) A. Gray -- accepted -- Texas milkpea
	Galactia wrightii A. Gray -- accepted -- Wright milkpea, Wright's milkpea
	Galactia wrightii var. wrightii A. Gray -- accepted -- Wright milkpea, Wright's milkpea
	Galarhoeus arkansanus (Engelm. & A. Gray) Small ex Rydb. -- not accepted
	Galarhoeus commutatus (Engelm. ex A. Gray) Small ex Rydb. -- not accepted
	Galarhoeus darlingtonii (A. Gray) Small -- not accepted
	Galinsoga parviflora var. semicalva A. Gray -- accepted
	Galinsoga semicalva (A. Gray) H. St. John & D. White -- not accepted
	Galium andrewsii A. Gray -- accepted -- phloxleaf bedstraw
	Galium andrewsii ssp. andrewsii A. Gray -- accepted -- Andrews' bedstraw
	Galium angustifolium Nutt. ex Torr. & A. Gray -- accepted -- narrowleaf bedstraw
	Galium angustifolium ssp. angustifolium Nutt. ex A. Gray -- accepted -- narrowleaf bedstraw
	Galium arkansanum A. Gray -- accepted -- Arkansas bedstraw
	Galium asperrimum A. Gray -- not accepted
	Galium asperrimum var. asperulum A. Gray -- not accepted
	Galium asperulum (A. Gray) Rydb. -- not accepted
	Galium bloomeri A. Gray -- not accepted
	Galium bloomeri var. hirsutum A. Gray -- not accepted
	Galium bolanderi A. Gray -- accepted -- Bolander's bedstraw
	Galium brandegeei A. Gray -- not accepted
	Galium californicum var. texanum Torr. & A. Gray -- not accepted
	Galium catalinense A. Gray -- accepted -- Santa Catalina Island bedstraw
	Galium catalinense ssp. catalinense A. Gray -- accepted -- Santa Catalina Island bedstraw
	Galium circaezans var. lanceolatum (Torr.) Torr. & A. Gray -- not accepted
	Galium concinnum Torr. & A. Gray -- accepted -- shining bedstraw
	Galium fendleri A. Gray -- accepted -- Fendler's bedstraw
	Galium hypotrichium A. Gray -- accepted -- alpine bedstraw
	Galium hypotrichium ssp. hypotrichium A. Gray -- accepted -- alpine bedstraw
	Galium margaricoccum A. Gray -- not accepted
	Galium matthewsii A. Gray -- accepted -- bushy bedstraw, Matthew bedstraw
	Galium mexicanum ssp. asperrimum (A. Gray) Dempster -- accepted -- Mexican bedstraw
	Galium mexicanum ssp. asperulum (A. Gray) Dempster -- accepted -- Mexican bedstraw
	Galium mexicanum var. asperrimum (A. Gray) Higgins & S.L. Welsh -- not accepted
	Galium mexicanum var. asperulum (A. Gray) Dempster -- not accepted
	Galium microphyllum A. Gray -- accepted -- bracted bedstraw
	Galium multiflorum var. hirsutum (A. Gray) Jeps. -- not accepted
	Galium multiflorum var. watsonii A. Gray -- not accepted
	Galium nuttallii A. Gray -- accepted -- climbing bedstraw
	Galium nuttallii ssp. nuttallii A. Gray -- accepted -- climbing bedstraw
	Galium pilosum var. puncticulosum (Michx.) Torr. & A. Gray -- accepted -- hairy bedstraw
	Galium proliferum A. Gray -- accepted -- limestone bedstraw
	Galium pubens A. Gray -- not accepted
	Galium pubens var. scabridum A. Gray -- not accepted
	Galium rothrockii A. Gray -- not accepted
	Galium texanum (Torr. & A. Gray) Wiegand -- not accepted
	Galium texense A. Gray -- accepted -- Texas bedstraw
	Galium trifidum var. pusillum A. Gray -- not accepted
	Galium trifidum var. tinctorium (L.) Torr. & A. Gray -- not accepted
	Galium virgatum var. diffusum A. Gray -- not accepted
	Galium virgatum var. leiocarpum Torr. & A. Gray -- not accepted
	Galium watsonii (A. Gray) A. Heller -- accepted -- Watson's bedstraw
	Galium wrightii A. Gray -- accepted -- slenderbranch bedstraw, Wright's bedstraw
	Galium wrightii var. rothrockii (A. Gray) Ehrend. ex Ferris -- not accepted
	Galpinsia lavandulifolia (Torr. & A. Gray) Small -- not accepted
	Galvezia speciosa (Nutt.) A. Gray -- not accepted -- island snapdragon
	Garberia A. Gray -- accepted -- garberia
	Garberia fruticosa (Nutt.) A. Gray -- not accepted
	Garrya buxifolia A. Gray -- accepted -- dwarf silktassel
	Gatesia laetevirens (Buckley) A. Gray -- not accepted
	Gaultheria ovatifolia A. Gray -- accepted -- western teaberry
	Gaura biennis var. pitcheri Torr. & A. Gray -- not accepted
	Gaura drummondii (Spach) Torr. & A. Gray -- not accepted -- Drummond's beeblossom, scented gaura
	Gaura filipes var. major Torr. & A. Gray -- not accepted
	Gaura lindheimeri Engelm. & A. Gray -- not accepted -- Lindheimer's beeblossom, white gaura
	Gaura pitcheri (Torr. & A. Gray) Small -- not accepted
	Gaylussacia brachycera (Michx.) A. Gray -- accepted -- box huckleberry
	Gaylussacia dumosa (Andrews) Torr. & A. Gray -- accepted -- dwarf huckleberry
	Gaylussacia dumosa var. dumosa (Andrews) Torr. & A. Gray -- not accepted -- dwarf huckleberry
	Gaylussacia frondosa (L.) Torr. & A. Gray -- accepted -- blue huckleberry, dangleberry
	Gaylussacia frondosa var. frondosa (L.) Torr. & A. Gray -- not accepted
	Gaylussacia frondosa var. nana A. Gray -- not accepted -- blue huckleberry
	Gaylussacia frondosa var. tomentosa A. Gray -- not accepted
	Gaylussacia nana (A. Gray) Small -- accepted -- Confederate huckleberry, dwarf dangleberry
	Gaylussacia tomentosa (A. Gray) Pursh ex Small -- accepted -- hairytwig dangleberry, hairytwig huckleberry
	Gaylussacia ursina (M.A. Curtis) Torr. & A. Gray -- accepted -- bear huckleberry
	Gayophytum diffusum Torr. & A. Gray -- accepted -- bigflower groundsmoke, spreading groundsmoke
	Gayophytum diffusum ssp. diffusum Torr. & A. Gray -- accepted -- spreading groundsmoke
	Gayophytum nuttallii Torr. & A. Gray -- not accepted
	Gayophytum racemosum Torr. & A. Gray -- accepted -- black-foot groundsmoke, blackfoot groundsmoke
	Gayophytum racemosum var. caesium (Torr. & A. Gray) Munz -- not accepted
	Gayophytum ramosissimum Torr. & A. Gray -- accepted -- muchbranched groundsmoke, pinyon groundsmoke
	Gayophytum strictum A. Gray -- not accepted
	Gentiana affinis var. bigelovii (A. Gray) Kusnez. -- not accepted
	Gentiana affinis var. forwoodii (A. Gray) Kusnez. -- not accepted
	Gentiana affinis var. ovata A. Gray -- not accepted
	Gentiana bigelovii A. Gray -- not accepted
	Gentiana flavida A. Gray -- not accepted
	Gentiana forwoodii A. Gray -- not accepted
	Gentiana grandis (A. Gray) T. Holm -- not accepted
	Gentiana holopetala (A. Gray) T. Holm -- not accepted
	Gentiana linearis var. lanceolata A. Gray -- not accepted
	Gentiana linearis var. latifolia A. Gray -- not accepted
	Gentiana newberryi A. Gray -- accepted -- alpine gentian
	Gentiana newberryi var. newberryi A. Gray -- accepted -- alpine gentian
	Gentiana oregana Engelm. ex A. Gray -- not accepted
	Gentiana quinquefolia var. occidentalis A. Gray -- not accepted
	Gentiana sceptrum var. humilis Engelm. ex A. Gray -- not accepted
	Gentiana setigera auct. non A. Gray -- not accepted
	Gentiana setigera A. Gray -- accepted -- Mendocino gentian
	Gentiana simplex A. Gray -- not accepted
	Gentiana wrightii A. Gray -- not accepted
	Gentianella amarella ssp. wrightii (A. Gray) J.M. Gillett -- not accepted -- Wright's dwarfgentian
	Gentianella detonsa ssp. holopetala (A. Gray) J.M. Gillett -- not accepted
	Gentianella occidentalis (A. Gray) Small -- not accepted
	Gentianella quinquefolia ssp. occidentalis (A. Gray) J.M. Gillett -- accepted -- agueweed
	Gentianella simplex (A. Gray) J.M. Gillett -- not accepted
	Gentianella wrightii (A. Gray) Holub -- accepted -- Wright's dwarf gentian
	Gentianopsis holopetala (A. Gray) Iltis -- accepted -- Sierra fringed gentian, Sierra gentian
	Gentianopsis simplex (A. Gray) Iltis -- accepted -- oneflower fringed gentian, oneflower gentian
	Geoprumnon tennesseense (A. Gray ex Chapm.) Rydb. -- not accepted
	Geraea Torr. & A. Gray -- accepted -- desert sunflower, desertsunflower
	Geraea canescens Torr. & A. Gray -- accepted -- desert sunflower, desertgold, hairy desertsunflower
	Geraea canescens var. canescens Torr. & A. Gray -- not accepted -- hairy desert sunflower, hairy desertsunflower
	Geraea canescens var. paniculata (A. Gray) S.F. Blake -- not accepted -- hairy desert sunflower, hairy desertsunflower
	Geraea viscida (A. Gray) S.F. Blake -- accepted -- sticky desertsunflower
	Geranium arboreum A. Gray -- accepted -- Hawai'i red cranesbill, Hawaiian red-flowered geranium
	Geranium caespitosum var. fremontii (Torr. ex A. Gray) Dorn -- not accepted -- Fremont's geranium
	Geranium cuneatum ssp. hololeucum (A. Gray) Carlquist & Bissing -- accepted -- hinahina
	Geranium cuneatum ssp. hypoleucum (A. Gray) Carlquist & Bissing -- accepted -- hinahina
	Geranium cuneatum var. hololeucum A. Gray -- not accepted -- hinahina
	Geranium cuneatum var. hypoleucum A. Gray -- not accepted -- hinahina
	Geranium cuneatum var. menziesii A. Gray -- not accepted
	Geranium fremontii Torr. ex A. Gray -- not accepted
	Geranium multiflorum A. Gray -- accepted -- manyflower geranium, nohoanu
	Geranium multiflorum ssp. ovatifolium (A. Gray) Carlquist & Bissing -- not accepted
	Geranium multiflorum var. ovatifolium (A. Gray) Fosberg -- not accepted
	Geranium ovatifolium A. Gray -- not accepted
	Geranium viscosissimum var. incisum (Torr. & A. Gray) N.H. Holmgren -- accepted -- sticky purple geranium
	Gerardia barbata (Torr. & A. Gray) S.F. Blake -- not accepted
	Gerardia dulcis var. floridana (A. Gray) S.F. Blake -- not accepted
	Gerardia floridana (A. Gray) Small -- not accepted
	Gerardia microphylla (A. Gray) Small -- not accepted
	Gerardia patula (Chapm.) A. Gray -- not accepted
	Gerardia paupercula (A. Gray) Britton -- not accepted
	Gerardia plukenetii var. microphylla A. Gray -- not accepted
	Gerardia purpurea var. paupercula A. Gray -- not accepted
	Geum vernum (Raf.) Torr. & A. Gray -- accepted -- heartleaf avens, spring avens
	Gilia acerosa (A. Gray) Britton -- not accepted
	Gilia aggregata var. attenuata A. Gray -- not accepted
	Gilia aggregata var. bridgesii A. Gray -- not accepted
	Gilia attenuata (A. Gray) A. Nelson -- not accepted
	Gilia bigelovii A. Gray -- not accepted
	Gilia brandegeei A. Gray -- not accepted
	Gilia bridgesii (A. Gray) Wherry -- not accepted
	Gilia caespitosa A. Gray -- not accepted -- Rabbit Valley gilia
	Gilia campanulata A. Gray -- not accepted -- bellflower gilia, bellshape gilia
	Gilia congesta var. crebrifolia (Nutt.) A. Gray -- not accepted
	Gilia depressa M.E. Jones ex A. Gray -- not accepted
	Gilia filiformis Parry ex A. Gray -- not accepted -- yellow gilia, yellow gily-flower
	Gilia gunnisonii Torr. & A. Gray -- not accepted
	Gilia havardii A. Gray -- not accepted
	Gilia haydenii A. Gray -- not accepted -- San Juan gilia
	Gilia inconspicua var. sinuata (Douglas ex Benth.) A. Gray -- not accepted
	Gilia latiflora (A. Gray) A. Gray -- accepted -- hollyleaf gilia
	Gilia latiflora ssp. exilis (A. Gray) H. Mason & A.D. Grant -- not accepted
	Gilia latiflora ssp. latiflora (A. Gray) A. Gray -- accepted -- hollyleaf gilia
	Gilia leptalea (A. Gray) Greene -- not accepted -- Bridges' gilia
	Gilia leptalea ssp. leptalea (A. Gray) Greene -- not accepted -- Bridges' gilia
	Gilia leptomeria A. Gray -- not accepted -- sand gilia, sand gily-flower, slender gilia
	Gilia leptomeria ssp. micromeria (A. Gray) H. Mason & A.D. Grant -- not accepted
	Gilia leptomeria var. micromeria (A. Gray) Cronquist -- not accepted
	Gilia macombii Torr. ex A. Gray -- not accepted
	Gilia micromeria A. Gray -- not accepted -- dainty gilia
	Gilia multicaulis ssp. nevinii (A. Gray) H. Mason & A.D. Grant -- not accepted
	Gilia nevinii A. Gray -- accepted -- Nevin's gilia
	Gilia nuttallii A. Gray -- not accepted
	Gilia ochroleuca ssp. exilis (A. Gray) A.D. Grant & V.E. Grant -- accepted -- volcanic gilia
	Gilia pinnatifida Nutt. ex A. Gray -- not accepted -- sticky gilia
	Gilia pringlei auct. non A. Gray -- not accepted
	Gilia pungens var. hookeri (Douglas ex Hook.) A. Gray -- not accepted
	Gilia rigidula ssp. acerosa (A. Gray) Wherry -- not accepted -- bluebowls
	Gilia rigidula var. acerosa A. Gray -- not accepted
	Gilia spicata var. capitata A. Gray -- not accepted
	Gilia stenothyrsa A. Gray -- not accepted -- Uinta Basin gilia
	Gilia subnuda Torr. ex A. Gray -- not accepted -- Canyon Lands gilia, coral gilia, coral gily-flower
	Gilia subnuda ssp. haydenii (A. Gray) Brand -- not accepted
	Gilia tenerrima A. Gray -- not accepted -- delicate gilia
	Gilia thurberi (Torr. ex A. Gray) A. Gray -- not accepted
	Gilia wrightii A. Gray -- not accepted
	Giliastrum acerosum (A. Gray) Rydb. -- accepted -- bluebowls
	Giliastrum rigidulum ssp. acerosum (A. Gray) W.A. Weber -- not accepted
	Githopsis diffusa A. Gray -- accepted -- San Gabriel bluecup
	Githopsis diffusa ssp. diffusa A. Gray -- accepted -- San Gabriel bluecup
	Glandularia wrightii (A. Gray) Umber -- not accepted -- Davis Mountain mock vervain, Wright's verbena
	Glossopetalon A. Gray -- accepted -- greasebush
	Glossopetalon nevadense A. Gray -- not accepted
	Glossopetalon spinescens A. Gray -- accepted -- spiny greasebush
	Glossopetalon spinescens var. spinescens A. Gray -- accepted -- spiny greasebush, thorny greasebush
	Glyceria spectabilis var. flaccida Trin. & Bong. ex A. Gray -- not accepted
	Glycosma occidentalis Nutt. ex Torr. & A. Gray -- not accepted
	Glyptopleura setulosa A. Gray -- accepted -- holy dandelion, holy-dandelion, largeflower carveseed
	Gnaphalium arizonicum A. Gray -- not accepted
	Gnaphalium leucocephaluim A. Gray -- not accepted
	Gnaphalium leucocephalum A. Gray -- not accepted
	Gnaphalium pringlei A. Gray -- not accepted
	Gnaphalium purpureum var. falcatum (Lam.) Torr. & A. Gray -- not accepted
	Gnaphalium wrightii A. Gray -- not accepted
	Gochnatia hypoleuca (DC.) A. Gray -- accepted -- shrubby bullseye
	Godetia epilobioides (Nutt. ex Torr. & A. Gray) S. Watson -- not accepted
	Godetia whitneyi (A. Gray) T. Moore -- not accepted
	Gomphocarpus cordifolius (Benth.) Benth. ex A. Gray -- not accepted
	Gonolobus arizonicus (A. Gray) Woodson -- accepted -- Arizona milkvine
	Gonolobus cynanchoides Engelm. & A. Gray -- not accepted
	Gonolobus reticulatus Engelm. ex A. Gray -- not accepted
	Gonolobus sagittifolius A. Gray -- not accepted
	Gonolobus shortii (A. Gray) A. Gray -- not accepted
	Gormania obtusata (A. Gray) Britton -- not accepted
	Gouania vitifolia A. Gray -- accepted -- Oahu chewstick
	Gouldia A. Gray -- not accepted
	Gouldia A. Gray -- not accepted
	Gouldia hirtella (A. Gray) Hillebr. -- not accepted
	Graphephorum cooleyi (A. Gray) Farw. -- not accepted
	Graphephorum festucaceum (Willd.) A. Gray -- not accepted
	Graphephorum fisheri (R. Br.) A. Gray -- not accepted
	Graphephorum fisheri var. fisheri (R. Br.) A. Gray -- not accepted
	Graphephorum fisheri var. psilosanthum (Rupr.) A. Gray -- not accepted
	Graphephorum flexuosum Thurb. ex A. Gray -- not accepted
	Graphephorum fulvum (Trin.) A. Gray -- not accepted
	Graphephorum melicoides var. cooleyi (A. Gray) Scribn. -- not accepted
	Graphephorum melicoides var. majus A. Gray -- not accepted
	Graphephorum pendulina (Laest.) A. Gray -- not accepted
	Grayia brandegeei A. Gray -- accepted -- Brandegee's siltbush, siltbush, spineless hopsage
	Greenella A. Gray -- accepted
	Greenella arizonica A. Gray -- not accepted
	Greenella discoidea A. Gray -- not accepted
	Greggia camporum A. Gray -- not accepted
	Gregoria montana (A. Gray) House -- not accepted
	Grindelia arizonica A. Gray -- accepted -- Arizona gumweed, cutleaf gumweed, New Mexican gumweed
	Grindelia arizonica var. arizonica A. Gray -- not accepted -- Arizona gumweed
	Grindelia gymnospermoides (A. Gray) Ruffin -- not accepted
	Grindelia nana var. discoidea (Nutt.) A. Gray -- not accepted
	Grindelia robusta var. angustifolia A. Gray -- not accepted
	Grindelia squarrosa var. nuda (Alph. Wood) A. Gray -- not accepted
	Grindelia stricta var. angustifolia (A. Gray) M.A. Lane -- not accepted -- Oregon gumweed
	Grossularia lobbii (A. Gray) Coville & Britton -- not accepted
	Guaiacum coulteri A. Gray -- accepted
	Guardiola platyphylla A. Gray -- accepted -- Apache plant
	Gundlachia A. Gray -- not accepted
	Gundlachia A. Gray -- accepted -- gundlachia
	Gutierrezia arizonica (A. Gray) M.A. Lane -- accepted -- Arizona snakeweed
	Gutierrezia californica (DC.) Torr. & A. Gray -- accepted -- California snakeweed, San Joaquin snakeweed
	Gutierrezia eriocarpa A. Gray -- not accepted
	Gutierrezia gymnospermoides A. Gray -- not accepted
	Gutierrezia microcephala (DC.) A. Gray -- accepted -- threadleaf snakeweed
	Gutierrezia sphaerocephala A. Gray -- accepted -- round-leaf snakeweed, roundleaf snakeweed
	Gutierrezia texana (DC.) Torr. & A. Gray -- accepted -- Texas broomweed, Texas snakeweed
	Gutierrezia texana var. texana (DC.) Torr. & A. Gray -- accepted -- Texas snakeweed
	Gutierrezia wrightii A. Gray -- accepted -- Wright's snakeweed
	Gymnolomia hispida (A. Gray) B.L. Rob. & Greenm. -- not accepted
	Habenaria hookeri Torr. ex A. Gray -- not accepted
	Habenaria leucophaea (Nutt.) A. Gray -- not accepted
	Habenaria peramoena A. Gray -- not accepted
	Habenaria psycodes var. grandiflora (Bigelow) A. Gray -- not accepted
	Habenaria viridis var. bracteata (Muhl.) A. Gray -- not accepted
	Hackelia americana (A. Gray) Fernald -- not accepted
	Hackelia californica (A. Gray) I.M. Johnst. -- accepted -- California stickseed
	Hackelia deflexa ssp. americana (A. Gray) �. L�ve & D. L�ve -- not accepted
	Hackelia deflexa var. americana (A. Gray) Fernald & I.M. Johnst. -- accepted -- American stickseed, nodding stickseed
	Hackelia hispida (A. Gray) I.M. Johnst. -- accepted -- showy stickseed
	Hackelia hispida var. hispida (A. Gray) I.M. Johnst. -- accepted -- showy stickseed
	Hackelia pinetorum (Greene ex A. Gray) I.M. Johnst. -- accepted -- Livermore stickseed
	Hackelia pinetorum var. pinetorum (Greene ex A. Gray) I.M. Johnst. -- accepted -- Livermore stickseed
	Hackelia ursina (Greene ex A. Gray) I.M. Johnst. -- accepted -- Chihuahuan stickseed
	Hackelia ursina var. ursina (Greene ex A. Gray) I.M. Johnst. -- accepted -- Chihuahuan stickseed
	Halea ludoviciana Torr. & A. Gray -- not accepted
	Halenia deflexa var. brentoniana (Griseb.) A. Gray -- not accepted
	Halenia rothrockii A. Gray -- accepted -- Mt. Graham spurred gentian, southwest spurred gentian
	Halimolobos diffusa (A. Gray) O.E. Schulz -- accepted -- spreading fissurewort, spreading halimolobos
	Halimolobos diffusa var. diffusa (A. Gray) O.E. Schulz -- not accepted -- spreading fissurewort
	Halimolobos pubens (A. Gray) Al-Shehbaz & C.D. Bailey -- accepted -- Trans-Pecos cress
	Hamosa leptocarpa (Torr. & A. Gray) Rydb. -- not accepted
	Haploesthes A. Gray -- accepted -- false broomweed
	Haploesthes greggii A. Gray -- accepted -- false broomweed
	Haploesthes greggii var. greggii A. Gray -- accepted
	Haplopappus acaulis (Nutt.) A. Gray -- not accepted
	Haplopappus alpigenus Torr. & A. Gray -- not accepted
	Haplopappus apargioides A. Gray -- not accepted
	Haplopappus arborescens (A. Gray) H.M. Hall -- not accepted
	Haplopappus armerioides (Nutt.) A. Gray -- not accepted
	Haplopappus aureus A. Gray -- not accepted
	Haplopappus blephariphyllus A. Gray -- not accepted
	Haplopappus bloomeri A. Gray -- not accepted
	Haplopappus bloomeri ssp. sonnei (A. Gray) H.M. Hall -- not accepted
	Haplopappus bloomeri var. angustatus A. Gray -- not accepted
	Haplopappus bloomeri var. greenei (A. Gray) Cronquist -- not accepted
	Haplopappus bloomeri var. sonnei (A. Gray) Greene -- not accepted
	Haplopappus brandegeei A. Gray -- not accepted
	Haplopappus canus (A. Gray) S.F. Blake -- not accepted
	Haplopappus carthamoides (Hook.) A. Gray -- not accepted
	Haplopappus carthamoides ssp. cusickii (A. Gray) H.M. Hall -- not accepted
	Haplopappus carthamoides var. cusickii A. Gray -- not accepted
	Haplopappus carthamoides var. maximus A. Gray -- not accepted
	Haplopappus coloradoensis (A. Gray) R.L. Hartm. ex Dorn -- not accepted
	Haplopappus cooperi (A. Gray) H.M. Hall -- not accepted
	Haplopappus coulteri Harv. & A. Gray ex A. Gray -- not accepted
	Haplopappus croceus A. Gray -- not accepted
	Haplopappus cuneatus A. Gray -- not accepted
	Haplopappus cuneatus var. spathulatus (A. Gray) S.F. Blake ex Munz -- not accepted
	Haplopappus divaricatus (Nutt.) A. Gray -- not accepted
	Haplopappus divaricatus var. hookerianus (Torr. & A. Gray) Waterf. -- not accepted
	Haplopappus drummondii (Torr. & A. Gray) S.F. Blake -- not accepted
	Haplopappus engelmannii (A. Gray) H.M. Hall -- not accepted
	Haplopappus fremontii (A. Gray) Greene -- not accepted
	Haplopappus fremontii ssp. wardii (A. Gray) H.M. Hall -- not accepted
	Haplopappus gracilis (Nutt.) A. Gray -- not accepted
	Haplopappus greenei A. Gray -- not accepted
	Haplopappus greenei var. mollis A. Gray -- not accepted
	Haplopappus hallii A. Gray -- not accepted
	Haplopappus heterophyllus (A. Gray) S.F. Blake -- not accepted
	Haplopappus hirtus A. Gray -- not accepted
	Haplopappus integrifolius Porter ex A. Gray -- not accepted
	Haplopappus lanceolatus (Hook.) Torr. & A. Gray -- not accepted
	Haplopappus lanceolatus var. lanceolatus (Hook.) Torr. & A. Gray -- not accepted
	Haplopappus lanceolatus var. tenuicaulis (D.C. Eaton) A. Gray -- not accepted
	Haplopappus lanuginosus A. Gray -- not accepted
	Haplopappus laricifolius A. Gray -- not accepted
	Haplopappus lyallii A. Gray -- not accepted
	Haplopappus macronema (Nutt.) A. Gray -- not accepted
	Haplopappus multicaulis (Nutt.) A. Gray -- not accepted
	Haplopappus nuttallii Torr. & A. Gray -- not accepted
	Haplopappus palmeri A. Gray -- not accepted
	Haplopappus paniculatus var. virgatus A. Gray -- not accepted
	Haplopappus parryi A. Gray -- not accepted
	Haplopappus pinifolius A. Gray -- not accepted
	Haplopappus pluriflorus (Torr. & A. Gray) H.M. Hall -- not accepted
	Haplopappus pygmaeus (Torr. & A. Gray) A. Gray -- not accepted
	Haplopappus racemosus var. glomerellus (Nutt.) A. Gray -- not accepted
	Haplopappus resinosus (Nutt.) A. Gray -- not accepted
	Haplopappus spinulosus var. canescens A. Gray -- not accepted
	Haplopappus spinulosus var. glaber A. Gray -- not accepted
	Haplopappus stenophyllus A. Gray -- not accepted
	Haplopappus suffruticosus (Nutt.) A. Gray -- not accepted
	Haplopappus uniflorus (Hook.) Torr. & A. Gray -- not accepted
	Haplopappus uniflorus ssp. howellii (A. Gray) H.M. Hall -- not accepted
	Haplopappus uniflorus var. howellii (A. Gray) M. Peck -- not accepted
	Haplopappus uniflorus var. uniflorus (Hook.) Torr. & A. Gray -- not accepted
	Haplopappus wardii (A. Gray) Dorn -- not accepted
	Haplopappus watsonii A. Gray -- not accepted
	Haplopappus whitneyi A. Gray -- not accepted
	Haplopappus whitneyi var. whitneyi A. Gray -- not accepted
	Haplostachys (A. Gray) Hillebr. -- accepted
	Haplostachys haplostachya (A. Gray) H. St. John -- accepted -- honohono
	Haplostachys truncata (A. Gray) Hillebr. -- accepted -- Maui islandmint
	Harbouria trachypleura (A. Gray) J.M. Coult. & Rose -- accepted -- whiskbroom parsley
	Harpagonella A. Gray -- accepted -- grapplinghook
	Harpagonella palmeri A. Gray -- accepted -- Palmer's grappling-hook, Palmer's grapplinghook
	Harpagonella palmeri var. palmeri A. Gray -- accepted -- Palmer's grapplinghook
	Hartwrightia A. Gray ex S. Watson -- accepted -- hartwrightia
	Hartwrightia floridana A. Gray ex S. Watson -- accepted -- Florida hartwrightia
	Hazardia cana (A. Gray) Greene -- accepted -- island hazardia
	Hazardia orcuttii (A. Gray) Greene -- accepted -- Orcutt's bristleweed, Orcutt's hazardia
	Hazardia whitneyi (A. Gray) Greene -- accepted -- Whitney's bristleweed
	Hazardia whitneyi var. whitneyi (A. Gray) Greene -- accepted -- Whitney's bristleweed
	Hecastocleis A. Gray -- accepted -- hecastocleis
	Hecastocleis shockleyi A. Gray -- accepted -- prickleleaf
	Hedeoma drummondii var. reverchonii A. Gray -- not accepted
	Hedeoma glabrescens (A. Gray) Briq. -- not accepted
	Hedeoma graveolens Chapm. ex A. Gray -- not accepted -- mock pennyroyal
	Hedeoma hyssopifolia A. Gray -- accepted -- aromatic false pennyroyal, falsepennyroyal, mock pennyroyal
	Hedeoma hyssopifolium A. Gray -- not accepted
	Hedeoma oblongifolia (A. Gray) A. Heller -- accepted -- false pennyroyal, falsepennyroyal, oblongleaf false pennyroyal
	Hedeoma oblongifolium (A. Gray) A. Heller -- not accepted
	Hedeoma piperita var. oblongifolia A. Gray -- not accepted
	Hedeoma reverchonii (A. Gray) A. Gray -- accepted -- Reverchon's false pennyroyal, Reverchon's falsepennyroyal
	Hedeoma reverchonii var. reverchonii (A. Gray) A. Gray -- accepted -- Reverchon's false pennyroyal, Reverchon's falsepennyroyal
	Hedeoma thymoides A. Gray -- not accepted
	Hedeoma thymoides var. oblongifolia (A. Gray) A. Gray -- not accepted
	Hedosyne ambrosiifolia (A. Gray) Strother -- accepted -- ragged marsh-elder
	Hedyotis acerosa A. Gray -- not accepted
	Hedyotis acerosa var. polypremoides (A. Gray) W.H. Lewis -- not accepted
	Hedyotis caerulea var. minor (Michx.) Torr. & A. Gray -- not accepted
	Hedyotis glaucifolia (A. Gray) Fosberg -- not accepted
	Hedyotis greenei (A. Gray) W.H. Lewis -- not accepted -- Greene's star-violet, Greene's starviolet
	Hedyotis halei Torr. & A. Gray -- not accepted
	Hedyotis humifusa A. Gray -- not accepted
	Hedyotis longifolia var. tenuifolia (Nutt.) Torr. & A. Gray -- not accepted
	Hedyotis minima (Beck) Torr. & A. Gray -- not accepted
	Hedyotis nigricans var. parviflora (A. Gray) W.H. Lewis -- not accepted
	Hedyotis nigricans var. rigidiuscula (A. Gray) Shinners -- not accepted
	Hedyotis parvula (A. Gray) Fosberg -- not accepted -- rockface starviolet
	Hedyotis polypremoides (A. Gray) Shinners -- not accepted
	Hedyotis purpurea (L.) Torr. & A. Gray -- not accepted
	Hedyotis purpurea var. calycosa (A. Gray) Fosberg -- not accepted
	Hedyotis rubra (Cav.) A. Gray -- not accepted
	Hedyotis stenophylla var. parviflora A. Gray -- not accepted
	Hedyotis subviscosa (C. Wright ex A. Gray) Shinners -- not accepted
	Hedyotis wrightii (A. Gray) Fosberg -- not accepted
	Heimia longipes (A. Gray) Cory -- not accepted
	Helenium amarum var. badium (A. Gray ex S. Watson) Waterf. -- accepted -- basin sneezeweed, yellowdicks
	Helenium amphilobum A. Gray -- not accepted
	Helenium autumnale var. canaliculatum (Lam.) Torr. & A. Gray -- not accepted
	Helenium autumnale var. grandiflorum (Nutt.) Torr. & A. Gray -- not accepted -- fall sneezeweed
	Helenium badium (A. Gray ex S. Watson) Greene -- not accepted
	Helenium bigelovii A. Gray -- accepted -- Bigelow's sneezeweed
	Helenium bolanderi A. Gray -- accepted -- coastal sneezeweed
	Helenium curtisii A. Gray -- not accepted
	Helenium elegans var. amphilobum (A. Gray) Bierner -- accepted -- pretty sneezeweed
	Helenium hoopesii A. Gray -- not accepted
	Helenium incisum (Torr. & A. Gray) Alph. Wood -- not accepted
	Helenium lanciniatum A. Gray -- accepted
	Helenium microcephalum var. ooclinium (A. Gray) Bierner -- accepted -- smallhead sneezeweed
	Helenium nuttallii A. Gray -- not accepted
	Helenium ooclinium A. Gray -- not accepted
	Helenium tenuifolium var. badium A. Gray ex S. Watson -- not accepted
	Helenium thurberi A. Gray -- accepted -- Thurber's sneezeweed
	Helianthella Torr. & A. Gray -- accepted -- helianthella
	Helianthella californica A. Gray -- accepted -- California helianthella
	Helianthella californica ssp. californica A. Gray -- accepted -- California helianthella
	Helianthella californica var. californica A. Gray -- not accepted -- California helianthella
	Helianthella grandiflora Torr. & A. Gray -- not accepted
	Helianthella microcephala (A. Gray) A. Gray -- accepted -- purpledisk helianthella, small-head dwarf-sunflower
	Helianthella parryi A. Gray -- accepted -- Parry's dwarf-sunflower, Parry's dwarfsunflower
	Helianthella pringlei A. Gray -- not accepted
	Helianthella quinquenervis (Hook.) A. Gray -- accepted -- fivenerve helianthella, nodding dwarf-sunflower, nodding helianthella
	Helianthella tenuifolia Torr. & A. Gray -- not accepted
	Helianthella uniflora (Nutt.) Torr. & A. Gray -- accepted -- oneflower helianthella
	Helianthella uniflora var. douglasii (Torr. & A. Gray) W.A. Weber -- not accepted -- Douglas' helianthella
	Helianthella uniflora var. uniflora (Nutt.) Torr. & A. Gray -- not accepted -- oneflower helianthella
	Helianthemum capitatum Nutt. ex Engelm. & A. Gray -- not accepted
	Helianthus argophyllis Torr. & A. Gray -- not accepted
	Helianthus argophyllus Torr. & A. Gray -- accepted -- silverleaf sunflower
	Helianthus bolanderi A. Gray -- accepted -- serpentine sunflower
	Helianthus canescens (A. Gray) S. Watson -- not accepted
	Helianthus cinereus var. sullivantii Torr. & A. Gray -- not accepted
	Helianthus cucumerifolius Torr. & A. Gray -- not accepted
	Helianthus cusickii A. Gray -- accepted -- Cusick's sunflower
	Helianthus debilis ssp. cucumerifolius (Torr. & A. Gray) Heiser -- accepted -- cucumberleaf sunflower
	Helianthus debilis ssp. praecox (Engelm. & A. Gray) Heiser -- not accepted
	Helianthus debilis var. cucumerifolius (Torr. & A. Gray) A. Gray -- not accepted
	Helianthus exilis A. Gray -- accepted -- serpentine sunflower
	Helianthus floridanus A. Gray ex Chapm. -- accepted -- Florida sunflower
	Helianthus gracilentus A. Gray -- accepted -- slender sunflower
	Helianthus grosseserratus var. hypoleucus A. Gray -- not accepted
	Helianthus hirsutus var. stenophyllus Torr. & A. Gray -- not accepted
	Helianthus hirsutus var. trachyphyllus Torr. & A. Gray -- not accepted
	Helianthus laciniatus A. Gray -- accepted -- alkali sunflower
	Helianthus laevigatus Torr. & A. Gray -- accepted -- smooth sunflower
	Helianthus microcephalus Torr. & A. Gray -- accepted -- small woodland sunflower
	Helianthus niveus ssp. canescens (A. Gray) Heiser -- not accepted -- showy sunflower
	Helianthus niveus ssp. tephrodes (A. Gray) Heiser -- accepted -- Algodones sunflower
	Helianthus nuttallii Torr. & A. Gray -- accepted -- Nuttall's sunflower
	Helianthus nuttallii ssp. nuttallii Torr. & A. Gray -- accepted -- Nuttall's sunflower
	Helianthus nuttallii ssp. parishii (A. Gray) Heiser -- accepted -- Parish's sunflower
	Helianthus occidentalis ssp. plantagineus (Torr. & A. Gray) Shinners -- accepted -- fewleaf sunflower, Gewleaf sunflower
	Helianthus occidentalis var. dowellianus (M.A. Curtis) Torr. & A. Gray -- not accepted
	Helianthus occidentalis var. plantagineus Torr. & A. Gray -- not accepted
	Helianthus parishii A. Gray -- not accepted
	Helianthus petiolaris var. canescens A. Gray -- not accepted
	Helianthus porteri (A. Gray) Pruski -- accepted -- Porter's sunflower
	Helianthus praecox Engelm. & A. Gray -- accepted -- Texas sunflower
	Helianthus praecox ssp. praecox Engelm. & A. Gray -- accepted -- Texas sunflower
	Helianthus radula (Pursh) Torr. & A. Gray -- accepted -- rayless sunflower, stiff sunflower
	Helianthus schweinitzii Torr. & A. Gray -- accepted -- Schweinitz's sunflower
	Helianthus stenophyllus (Torr. & A. Gray) E.E. Watson -- not accepted
	Helianthus tephrodes A. Gray -- not accepted
	Helianthus tuberosus var. subcanescens A. Gray -- not accepted
	Helianthus X ambiguus (A. Gray) Britton (pro sp.) -- accepted -- ambiguous sunflower
	Helianthus X cinereus Torr. & A. Gray (pro sp.) -- accepted -- sunflower
	Helietta parvifolia (A. Gray ex Hemsl.) Benth. -- accepted -- barreta
	Heliomeris hispida (A. Gray) Cockerell -- accepted -- hairy falsegoldeneye, rough false goldeneye
	Heliomeris porteri (A. Gray) Cockerell -- not accepted
	Heliomeris tenuifolia A. Gray -- not accepted
	Heliopsis parvifolia A. Gray -- accepted -- mountain oxeye
	Heliotropium anomalum var. argenteum A. Gray -- accepted -- Polynesian heliotrope
	Heliotropium confertifolium (Torr.) Torr. ex A. Gray -- accepted -- leafy heliotrope
	Heliotropium convolvulaceum (Nutt.) A. Gray -- not accepted -- bindweed heliotrope, phlox heliotrope, wide-flower heliotrope
	Heliotropium convolvulaceum var. convolvulaceum (Nutt.) A. Gray -- not accepted -- phlox heliotrope
	Heliotropium glabriusculum (Torr.) A. Gray -- accepted -- greeneye heliotrope
	Hemicarpha occidentalis A. Gray -- not accepted
	Hemitomes A. Gray -- accepted -- coneplant, gnome plant
	Hemitomes congestum A. Gray -- accepted -- coneplant, gnome plant
	Hemizonella (A. Gray) A. Gray -- accepted
	Hemizonella minima (A. Gray) A. Gray -- accepted -- opposite-leaved tarweed
	Hemizonia corymbosa (DC.) Torr. & A. Gray -- not accepted -- coastal tarweed
	Hemizonia corymbosa ssp. corymbosa (DC.) Torr. & A. Gray -- not accepted -- coastal tarweed
	Hemizonia douglasii A. Gray -- not accepted
	Hemizonia fasciculata (DC.) Torr. & A. Gray -- not accepted -- clustered tarweed
	Hemizonia fitchii A. Gray -- not accepted -- Fitch's tarweed
	Hemizonia floribunda A. Gray -- not accepted -- Tecate tarweed
	Hemizonia fremontii (A. Gray) A. Gray -- not accepted
	Hemizonia mollis (A. Gray) A. Gray -- not accepted
	Hemizonia multiglandulosa var. sparsa A. Gray -- not accepted
	Hemizonia paniculata A. Gray -- not accepted -- San Diego tarweed
	Hemizonia paniculata var. paniculata A. Gray -- not accepted
	Hemizonia pauciflora (A. Gray) A. Gray -- not accepted
	Hemizonia pugens (Hook. & Arn.) Torr. & A. Gray -- not accepted
	Hemizonia pugens var. pugens (Hook. & Arn.) Torr. & A. Gray -- not accepted
	Hemizonia pungens (Hook. & Arn.) Torr. & A. Gray -- not accepted -- common spikeweed, common tarweed, spikeweed
	Hemizonia pungens ssp. pungens (Hook. & Arn.) Torr. & A. Gray -- not accepted -- common tarweed, spikeweed
	Hemizonia tenella (Nutt.) A. Gray -- not accepted
	Hemizonia truncata (DC.) A. Gray -- not accepted
	Hermannia texana A. Gray -- accepted -- Texas burstwort, Texas hermannia
	Hesperevax (A. Gray) A. Gray -- accepted -- dwarf-cudweed
	Hesperevax caulescens (Benth.) A. Gray -- accepted -- dwarf dwarf-cudweed
	Hesperevax sparsiflora (A. Gray) Greene -- accepted -- erect dwarf-cudweed
	Hesperevax sparsiflora var. brevifolia (A. Gray) Morefield -- accepted -- shortleaf dwarf-cudweed
	Hesperevax sparsiflora var. sparsiflora (A. Gray) Greene -- accepted -- erect dwarf-cudweed
	Hesperidanthus linearifolius (A. Gray) Rydb. -- accepted -- slimleaf plainsmustard
	Hesperocallis A. Gray -- accepted -- desert lily
	Hesperocallis undulata A. Gray -- accepted -- desert lily
	Hesperodoria hallii (A. Gray) Greene -- not accepted
	Hesperolinon (A. Gray) Small -- accepted -- dwarf-flax
	Hesperolinon adenophyllum (A. Gray) Small -- accepted -- glandular dwarf-flax
	Hesperolinon breweri (A. Gray) Small -- accepted -- Brewer's dwarf-flax
	Hesperolinon congestum (A. Gray) Small -- accepted -- Marin dwarf-flax
	Hesperolinon micranthum (A. Gray) Small -- accepted -- smallflower dwarf-flax
	Hesperolinon spergulinum (A. Gray) Small -- accepted -- slender dwarf-flax
	Hesperomannia A. Gray -- accepted -- island-aster
	Hesperomannia arborescens A. Gray -- accepted -- Lanai island-aster
	Hesperomannia arborescens var. arborescens A. Gray -- not accepted
	Hesperonia bigelovii (A. Gray) Standl. -- not accepted
	Heterotheca bolanderi (A. Gray) V.L. Harms -- not accepted
	Heterotheca breweri (A. Gray) Shinners -- not accepted
	Heterotheca oligantha (Chapm. ex Torr. & A. Gray) V.L. Harms -- not accepted
	Heterotheca oregona var. scaberrima (A. Gray) Semple -- accepted -- Oregon false goldenaster
	Heterotheca scabrella (Torr. & A. Gray) V.L. Harms -- not accepted
	Heterotheca sessiliflora ssp. bolanderi (A. Gray) Semple -- accepted -- sessileflower false goldenaster
	Heterotheca stenophylla (A. Gray) Shinners -- accepted -- stiffleaf false goldenaster, stiffleaf falsegoldenaster
	Heterotheca stenophylla var. stenophylla (A. Gray) Shinners -- accepted -- stiffleaf false goldenaster
	Heterotheca villosa var. nana (A. Gray) Semple -- accepted -- hairy false goldenaster
	Heterotheca viscida (A. Gray) V.L. Harms -- accepted -- cliff false goldenaster, cliff falsegoldenaster
	Heuchera curtisii Torr. & A. Gray ex A. Gray -- not accepted
	Heuchera cylindrica var. glabella (Torr. & A. Gray) Wheelock -- not accepted -- beautiful alumroot
	Heuchera cylindrica var. ovalifolia (Torr. & A. Gray) Wheelock -- not accepted
	Heuchera glabella Torr. & A. Gray -- not accepted
	Heuchera hallii A. Gray -- accepted -- Front Range alumroot
	Heuchera ovalifolia Torr. & A. Gray -- not accepted
	Heuchera parvifolia Nutt. ex Torr. & A. Gray -- accepted -- common alumroot, little-leaf alumroot, littleleaf alumroot
	Heuchera parvifolia var. parvifolia Nutt. ex Torr. & A. Gray -- not accepted -- littleleaf alumroot
	Hibiscus arnottianus A. Gray -- accepted -- white rosemallow
	Hibiscus arnottianus ssp. arnottianus A. Gray -- accepted -- white rosemallow
	Hibiscus brackenridgei A. Gray -- accepted -- Brackenridge's rosemallow, ma'o hau hele
	Hibiscus brackenridgei ssp. brackenridgei A. Gray -- accepted -- Brackenridge's rosemallow
	Hibiscus cardiophyllus A. Gray -- not accepted
	Hibiscus coulteri Harv. ex A. Gray -- accepted -- Coulter's hibiscus, desert rose-mallow, desert rosemallow
	Hibiscus denudatus var. involucellatus A. Gray -- not accepted
	Hibiscus lasiocarpos var. occidentalis (Torr.) A Gray -- not accepted
	Hieracium argutum var. parishii (A. Gray) Jeps. -- not accepted
	Hieracium bolanderi A. Gray -- accepted -- Bolander's hawkweed
	Hieracium cynoglossoides var. nudicaule A. Gray -- not accepted
	Hieracium fendleri var. discolor A. Gray -- not accepted -- yellow hawkweed
	Hieracium fendleri var. mogollense A. Gray -- not accepted -- Mogollon hawkweed
	Hieracium gracile var. detonsum (A. Gray) A. Gray -- not accepted -- low alpine hawkweed
	Hieracium greenei A. Gray -- accepted -- Greene's hawkweed
	Hieracium lemmonii A. Gray -- not accepted -- Lemmon's hawkweed
	Hieracium nudicaule (A. Gray) A. Heller -- accepted -- Scouler's woollyweed
	Hieracium pringlei A. Gray -- accepted -- Pringle's hawkweed
	Hieracium scouleri var. nudicaule (A. Gray) Cronquist -- not accepted -- Scouler's woollyweed, woollyweed
	Hieracium triste var. gracile (Hook.) A. Gray -- not accepted
	Hieracium wrighti (A. Gray) Keck -- not accepted
	Hieracium wrightii (A. Gray) B.L. Rob. & Greenm. -- not accepted -- roughstem hawkweed
	Himantostemma pringlei A. Gray -- not accepted
	Hirculus serpyllifolius ssp. chrysanthus (A. Gray) W.A. Weber -- not accepted
	Hoffmannseggia brachycarpa A. Gray -- not accepted
	Hoffmannseggia caudata A. Gray -- not accepted
	Hoffmannseggia densiflora var. demissa (A. Gray) Fisher -- not accepted
	Hoffmannseggia drepanocarpa A. Gray -- accepted -- sicklepod holdback
	Hoffmannseggia drummondii Torr. & A. Gray -- accepted -- dwarf nicker
	Hoffmannseggia jamesii Torr. & A. Gray -- not accepted
	Hoffmannseggia melanosticta (S. Schauer) A. Gray -- not accepted
	Hoffmanseggia drepanocarpa A. Gray -- not accepted
	Hofmeisteria pluriseta A. Gray -- not accepted
	Holacantha A. Gray -- accepted
	Holacantha emoryi A. Gray -- not accepted
	Holcophacos distortus (Torr. & A. Gray) Rydb. -- not accepted
	Holocarpha virgata (A. Gray) D.D. Keck -- accepted -- yellowflower tarweed
	Holocarpha virgata ssp. virgata (A. Gray) D.D. Keck -- accepted -- yellowflower tarweed
	Honckenya oblongifolia Torr. & A. Gray -- not accepted
	Horkelia bolanderi A. Gray -- accepted -- Bolander's horkelia, border horkelia
	Horkelia bolanderi ssp. bolanderi A. Gray -- not accepted -- Bolanders horkelia
	Horkelia californica var. sericea A. Gray -- not accepted
	Horkelia cuneata ssp. sericea (A. Gray) D.D. Keck -- not accepted -- wedge-leaved horkelia, wedgeleaf horkelia
	Horkelia cuneata var. sericea (A. Gray) Ertter & Reveal -- accepted -- wedgeleaf horkelia
	Horkelia sericea (A. Gray) Rydb. -- not accepted
	Horkelia tenuiloba (Torr.) A. Gray -- accepted -- Santa Rosa horkelia
	Horsfordia A. Gray -- accepted -- velvet mallow, velvetmallow
	Horsfordia alata (S. Watson) A. Gray -- accepted -- big feltplant, pink velvetmallow
	Horsfordia newberryi (S. Watson) A. Gray -- accepted -- Newberry's velvetmallow, yellow feltplant
	Hosackia argophylla A. Gray -- not accepted
	Hosackia fremontii (A. Gray) Abrams -- not accepted
	Hosackia puberula var. nana A. Gray -- not accepted
	Hosackia subpinnata auct. non (Lag.) Torr. & A. Gray -- not accepted
	Hosackia torreyi A. Gray -- not accepted
	Hosackia wrightii A. Gray -- not accepted
	Houstonia acerosa (A. Gray) Benth. & Hook. f. -- accepted -- needleleaf bluet
	Houstonia acerosa ssp. acerosa (A. Gray) A. Gray ex Benth. & Hook. f. -- not accepted -- needleleaf bluet
	Houstonia acerosa ssp. polypremoides (A. Gray) Terrell -- not accepted -- needleleaf bluet
	Houstonia acerosa var. acerosa (A. Gray) A. Gray ex Benth. & Hook. f. -- accepted -- needleleaf bluet
	Houstonia acerosa var. polypremoides (A. Gray) Terrell -- accepted
	Houstonia angustifolia var. filifolia (Chapm.) A. Gray -- not accepted
	Houstonia angustifolia var. rigidiuscula A. Gray -- not accepted
	Houstonia calycosa (A. Gray) C. Mohr -- not accepted
	Houstonia fasciculata A. Gray -- not accepted
	Houstonia greenei (A. Gray) Terrell -- accepted
	Houstonia humifusa (A. Gray) A. Gray -- accepted -- mat bluets, matted bluet
	Houstonia polypremoides A. Gray -- not accepted
	Houstonia purpurea var. calycosa A. Gray -- accepted -- Venus' pride
	Houstonia purpurea var. tenuifolia (Nutt.) A. Gray -- not accepted
	Houstonia rigidiuscula (A. Gray) Wooton & Standl. -- not accepted
	Houstonia subviscosa (C. Wright ex A. Gray) A. Gray -- accepted -- nodding bluet
	Houstonia wrightii A. Gray -- accepted -- pygmy bluet
	Howellia A. Gray -- accepted
	Howellia aquatilis A. Gray -- accepted -- water howellia
	Hulsea Torr. & A. Gray -- accepted -- alpinegold, hulsea
	Hulsea algida A. Gray -- accepted -- alpine hulsea, Pacific hulsea
	Hulsea brevifolia A. Gray -- accepted -- shortleaf alpinegold
	Hulsea californica Torr. & A. Gray -- accepted -- San Diego alpinegold
	Hulsea heterochroma A. Gray -- accepted -- redray alpinegold, redray hulsea
	Hulsea larsenii (A. Gray) Rydb. -- not accepted
	Hulsea nana A. Gray -- accepted -- dwarf alpinegold
	Hulsea nana var. larsenii A. Gray -- not accepted
	Hulsea parryi A. Gray -- not accepted
	Hulsea vestita A. Gray -- accepted -- pumice alpinegold, pumice hulsea
	Hulsea vestita ssp. parryi (A. Gray) Wilken -- accepted -- Parry's alpinegold
	Hulsea vestita ssp. pygmaea (A. Gray) Wilken -- accepted -- pygmy alpinegold
	Hulsea vestita ssp. vestita A. Gray -- accepted -- pumice alpinegold, pumice hulsea
	Hulsea vestita var. pygmaea A. Gray -- not accepted
	Hybanthus verticillatus var. platyphyllus (A. Gray) Cory & H.B. Parks -- not accepted -- babyslippers
	Hydrangea arborescens var. oblonga Torr. & A. Gray -- not accepted
	Hydrangea arborescens var. sterilis Torr. & A. Gray -- not accepted
	Hydrolea affinis A. Gray -- not accepted
	Hydrophila drummondii sensu (Torr. & A. Gray) House -- not accepted
	Hydrophila drummondii (Torr. & A. Gray) House -- not accepted
	Hydrophyllum fendleri (A. Gray) A. Heller -- accepted -- Fendler's waterleaf
	Hydrophyllum fendleri var. fendleri (A. Gray) A. Heller -- accepted -- Fendler's waterleaf
	Hydrophyllum occidentale (S. Watson) A. Gray -- accepted -- squaw-lettuce, western waterleaf
	Hydrophyllum occidentale var. watsonii A. Gray -- not accepted
	Hymenatherum neomexicanum A. Gray -- not accepted
	Hymenatherum tagetoides (Torr. & A. Gray) A. Gray -- not accepted
	Hymenoclea Torr. & A. Gray ex A. Gray -- accepted -- burrobrush
	Hymenoclea monogyla Torr. & A. Gray -- not accepted
	Hymenoclea monogyra Torr. & A. Gray -- not accepted -- cheeseweed burrobrush, singlewhorl burrobrush, singlewhorl burrobush
	Hymenoclea salsola Torr. & A. Gray -- not accepted -- burrobrush, white burrobrush
	Hymenoclea salsola var. salsola Torr. & A. Gray -- not accepted -- burrobrush, white burrobrush
	Hymenopappus corymbosus Torr. & A. Gray -- not accepted
	Hymenopappus flavescens A. Gray -- accepted -- collegeflower, yellow woollywhite, yellow woolywhite
	Hymenopappus flavescens var. canotomentosus A. Gray -- accepted -- college flower, collegeflower
	Hymenopappus flavescens var. flavescens A. Gray -- accepted -- collegeflower
	Hymenopappus mexicanus A. Gray -- accepted -- Mexican woollywhite
	Hymenopappus newberryi (A. Gray) I.M. Johnst. -- accepted -- Newberry's hymenopappus, Newberry's woollywhite
	Hymenopappus scabiosaeus var. corymbosus (Torr. & A. Gray) B.L. Turner -- accepted -- Carolina woollywhite
	Hymenothrix A. Gray -- accepted -- hymenothrix, thimblehead
	Hymenothrix wislizeni A. Gray -- accepted -- Trans-Pecos thimblehead
	Hymenothrix wislizenii A. Gray -- not accepted
	Hymenothrix wrightii A. Gray -- accepted -- Wright's thimblehead
	Hymenoxys acaulis var. glabra (A. Gray) K.F. Parker -- not accepted
	Hymenoxys ambigens var. floribunda (A. Gray) W.L. Wagner -- accepted -- Apache Pass rubberweed
	Hymenoxys argentea (A. Gray) K.F. Parker -- not accepted
	Hymenoxys bigelovii (A. Gray) K.F. Parker -- accepted -- Bigelow's rubberweed
	Hymenoxys brandegeei Porter ex A. Gray -- accepted -- Brandegee's four-nerve daisy, Brandegee's hymenoxys
	Hymenoxys cooperi (A. Gray) Cockerell -- accepted -- Cooper's hymenoxys, Cooper's rubberweed
	Hymenoxys cooperi var. cooperi (A. Gray) Cockerell -- not accepted -- Cooper's frostmat, Cooper's hymenoxys, Cooper's rubberweed
	Hymenoxys depressa (Torr. & A. Gray ex A. Gray) S.L. Welsh & Reveal -- not accepted
	Hymenoxys grandiflora (Torr. & A. Gray ex A. Gray) K.F. Parker -- accepted -- graylocks four-nerve daisy, graylocks hymenoxys
	Hymenoxys hoopesii (A. Gray) Bierner -- accepted -- orange sneezeweed, owl's-claws, owlsclaws, sneezeweed
	Hymenoxys microcephala (A. Gray) Bierner -- not accepted -- Apache Pass false rubbervine, Apache Pass rubberweed
	Hymenoxys richardsonii var. floribunda (A. Gray) K.F. Parker -- accepted -- Colorado rubberweed
	Hymenoxys rusbyi (A. Gray) Cockerell -- accepted -- Rusby's rubberweed
	Hymenoxys vaseyi (A. Gray) Cockerell -- accepted -- Vasey's rubberweed
	Hypericum canadense var. majus A. Gray -- not accepted
	Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray -- accepted -- Drummond's St. Johnswort, nits and lice
	Hypericum gymnanthum Engelm. & A. Gray -- accepted -- claspingleaf St. Johnswort
	Hypericum majus (A. Gray) Britton -- accepted -- greater Canadian St. John's-wort, large St. Johnswort
	Hypericum microsepalum (Torr. & A. Gray) A. Gray ex S. Watson -- accepted -- flatwoods St. Johnswort
	Hypericum opacum Torr. & A. Gray -- not accepted
	Hypopitys fimbriata (A. Gray) Howell -- not accepted
	Hypoxis hirsuta var. leptocarpa (Engelm. & A. Gray) Brackett -- not accepted
	Hypoxis leptocarpa (Engelm. & A. Gray) Small -- not accepted
	Ibervillea lindheimeri (A. Gray) Greene -- accepted -- balsamgourd, Lindheimer's globeberry, Rio Grande globeberry
	Ibervillea lindheimeri var. tenuisecta (A. Gray) M.C. Johnson -- not accepted
	Ibervillea tenuisecta (A. Gray) Small -- accepted -- deer-apples, slimlobe globeberry
	Ibidium vernale (Engelm. & A. Gray) House -- not accepted
	Ilex ambigua var. montana (Torr. & A. Gray ex A. Gray) H.E. Ahles -- not accepted
	Ilex ambigua var. monticola (A. Gray) Wunderlin & Poppleton -- not accepted
	Ilex amelanchier var. monticola (A. Gray) Alph. Wood -- not accepted
	Ilex glabra (L.) A. Gray -- accepted -- inkberry
	Ilex laevigata (Pursh) A. Gray -- accepted -- smooth winterberry
	Ilex montana Torr. & A. Gray ex A. Gray -- accepted -- mountain holly, mountain winterberry
	Ilex montana var. mollis (A. Gray) Britton -- not accepted
	Ilex monticola A. Gray -- not accepted
	Ilex verticillata (L.) A. Gray -- accepted -- common winterberry
	Ilex verticillata var. padifolia (Willd.) Torr. & A. Gray ex S. Watson -- not accepted
	Iliamna acerifolia (Nutt. ex Torr. & A. Gray) Greene -- not accepted
	Indigofera leptosepala Nutt. ex Torr. & A. Gray -- not accepted
	Indigofera miniata var. leptosepala (Nutt. ex Torr. & A. Gray) B.L. Turner -- not accepted -- western indigo
	Indigofera sphaerocarpa A. Gray -- accepted -- Sonoran indigo, Sonoran indigobush
	Iodanthus (Torr. & A. Gray) Steud. -- accepted
	Iodanthus hesperidioides (Torr. & A. Gray) A. Gray -- not accepted
	Ionactis stenomeres (A. Gray) Greene -- accepted -- Rocky Mountain aster
	Ipomoea barbatisepala A. Gray -- accepted -- canyon morning-glory, canyon morningglory
	Ipomoea cardiophylla A. Gray -- accepted -- heartleaf morning-glory, heartleaf morningglory
	Ipomoea coccinea var. hederifolia (L.) A. Gray -- not accepted
	Ipomoea cordatotriloba var. torreyana (A. Gray) D.F. Austin -- accepted -- cotton morningglory, Torrey's tievine
	Ipomoea cuneifolia A. Gray -- not accepted
	Ipomoea hederacea var. integriuscula A. Gray -- not accepted
	Ipomoea lemmonii A. Gray -- not accepted
	Ipomoea lindheimeri A. Gray -- accepted -- blue morningglory, Lindheimer's morning-glory, Lindheimer's morningglory
	Ipomoea plummerae A. Gray -- accepted -- Huachuca morningglory, Huachuca Mountain morning-glory, Huachuca Mountain morningglory
	Ipomoea plummerae var. cuneifolia (A. Gray) J.F. Macbr. -- not accepted -- Huachuca Mountain morning-glory, Huachuca Mountain morningglory
	Ipomoea plummerae var. plummerae A. Gray -- not accepted -- Huachuca Mountain morning-glory, Huachuca Mountain morningglory
	Ipomoea tenuiloba var. lemmonii (A. Gray) Yatsk. & C.T. Mason -- accepted -- Lemmon's morning-glory, spiderleaf
	Ipomoea thurberi A. Gray -- accepted -- Thurber's morning-glory, Thurber's morningglory
	Ipomoea trichocarpa var. torreyana (A. Gray) Shinners -- not accepted
	Ipomoea trifida var. torreyana A. Gray -- not accepted
	Ipomoea wrightii A. Gray -- accepted -- palmleaf morningglory, Wright's morning-glory, Wright's morningglory
	Ipomopsis aggregata ssp. attenuata (A. Gray) V.E. Grant & A.D. Grant -- accepted -- scarlet gilia
	Ipomopsis aggregata ssp. bridgesii (A. Gray) V.E. Grant & A.D. Grant -- accepted -- scarlet gilia
	Ipomopsis aggregata var. attenuata (A. Gray) Dorn -- not accepted
	Ipomopsis bridgesii (A. Gray) Wherry -- not accepted
	Ipomopsis depressa (M.E. Jones ex A. Gray) V.E. Grant -- not accepted -- depressed ipomopsis, depressed skyrocket
	Ipomopsis effusa (A. Gray) Moran -- accepted -- Baja California ipomopsis
	Ipomopsis gunnisonii (Torr. & A. Gray) V.E. Grant -- accepted -- sand-dune skyrocket, sanddune ipomopsis, sanddune skyrocket
	Ipomopsis harvardii (A. Gray) V.E. Grant -- not accepted
	Ipomopsis havardii (A. Gray) V.E. Grant -- accepted -- Havard's ipomopsis, Havard's skyrocket
	Ipomopsis macombii (Torr. ex A. Gray) V.E. Grant -- accepted -- Macomb's ipomopsis, Macomb's skyrocket
	Ipomopsis spicata ssp. capitata (A. Gray) V.E. Grant -- accepted -- spiked ipomopsis
	Ipomopsis stenothyrsa (A. Gray) W.A. Weber -- not accepted
	Ipomopsis teniufolia (A. Gray) V.E. Grant -- not accepted
	Ipomopsis tenuifolia (A. Gray) V.E. Grant -- accepted -- slender-leaf skyrocket, slenderleaf skyrocket
	Ipomopsis thurberi (Torr. ex A. Gray) V.E. Grant -- accepted -- El Paso skyrocket, Thurber skyrocket
	Ipomopsis wrightii (A. Gray) Gould ex Shinners -- accepted -- leafy skyrocket
	Isnardia spathulata (Torr. & A. Gray) Small -- not accepted
	Isocoma coronopifolia (A. Gray) Greene -- accepted -- common goldenbush, goldenweed
	Isocoma drummondii (Torr. & A. Gray) Greene -- accepted -- Drummond's goldenbush, Drummond's goldenweed, Drummond's jimmyweed
	Isocoma palmeri (A. Gray) Shinners -- not accepted
	Isocoma pluriflora (Torr. & A. Gray) Greene -- accepted -- rayless goldenrod, southern goldenbush, southern jimmyweed
	Isocoma wrightii (A. Gray) Rydb. -- not accepted
	Isodendrion A. Gray -- accepted
	Isodendrion laurifolium A. Gray -- accepted -- aupaka, rockcliff isodendrion
	Isodendrion longifolium A. Gray -- accepted -- aupaka, longleaf isodendrion
	Isodendrion pyrifolium A. Gray -- accepted -- Kula wahine noho, wahine noho kula
	Isopappus divaricatus (Nutt.) Torr. & A. Gray -- not accepted
	Isopappus hookerianus Torr. & A. Gray -- not accepted
	Isopyrum biternatum (Raf.) Torr. & A. Gray -- not accepted
	Isopyrum hallii A. Gray -- not accepted
	Isopyrum stipitatum A. Gray -- not accepted
	Iva ambrosiifolia (A. Gray) A. Gray -- not accepted -- rag sumpweed, ragged marsh-elder, ragged marshelder
	Iva ambrosiifolia var. ambrosiifolia (A. Gray) A. Gray -- not accepted
	Iva dealbata A. Gray -- not accepted -- woolly marsh-elder, woolly marshelder
	Iva hayesiana A. Gray -- accepted -- San Diego povertyweed
	Ivesia Torr. & A. Gray -- accepted -- mousetail
	Ivesia gordanii (Hook.) Torr. & A. Gray -- not accepted
	Ivesia gordonii (Hook.) Torr. & A. Gray -- accepted -- Gordon's ivesia
	Ivesia gordonii var. gordonii (Hook.) Torr. & A. Gray -- accepted -- Gordon's ivesia
	Ivesia gordonii var. pygmea (A. Gray) S. Watson -- not accepted -- Gordon's ivesia
	Ivesia gracilis Torr. & A. Gray -- not accepted
	Ivesia lycopodioides A. Gray -- accepted -- clubmoss ivesia, clubmoss mousetail
	Ivesia lycopodioides ssp. lycopodioides A. Gray -- not accepted -- clubmoss ivesia, clubmoss mousetail
	Ivesia lycopodioides var. lycopodioides A. Gray -- accepted -- clubmoss mousetail
	Ivesia muirii A. Gray -- accepted -- granite mousetail
	Ivesia pickeringii Torr. ex A. Gray -- accepted -- Pickering ivesia, silky mousetail
	Ivesia pygmaea A. Gray -- accepted -- dwarf ivesia, dwarf mousetail
	Ivesia santolinoides A. Gray -- accepted -- Sierra mousetail
	Ivesia unguiculata A. Gray -- accepted -- Yosemite mousetail
	Ivesia webberi A. Gray -- accepted -- Webber ivesia, Webber's ivesia, wire mousetail
	Ixeris stolonifera A. Gray -- accepted -- creeping lettuce
	Jacksonia tenuifolia (Torr. & A. Gray) Greene -- not accepted
	Jacobinia ovata A. Gray -- not accepted
	Jacquemontia ovalifolia ssp. sandwicensis (A. Gray) K.R. Robertson -- accepted -- oval-leaf clustervine
	Jacquemontia pringlei A. Gray -- accepted -- Pringle's clustervine
	Jacquemontia sandwicensis A. Gray -- not accepted
	Jamesia Torr. & A. Gray -- accepted -- cliffbush
	Jamesia americana Torr. & A. Gray -- accepted -- cliff Jamesia, cliffbush, fivepetal cliffbush
	Jamesia americana var. americana Torr. & A. Gray -- accepted -- fivepetal cliffbush
	Janusia gracilis A. Gray -- not accepted -- slender janusia
	Jaumea carnosa (Less.) A. Gray -- accepted -- marsh jaumea
	Jefea brevifolia (A. Gray) Strother -- accepted -- shorthorn zexmenia, shortleaf jefea
	Jensia yosemitana (Parry ex A. Gray) B.G. Baldw. -- accepted -- Yosemite tarweed
	Juncus debilis A. Gray -- accepted -- weak rush
	Justicia wrightii A. Gray -- accepted -- Wright's water-willow
	Kadua grandis A. Gray -- not accepted
	Kadua parvula A. Gray -- accepted
	Kallstroemia grandiflora Torr. ex A. Gray -- accepted -- Arizona poppy, orange caltrop
	Keckiella antirrhinoides ssp. microphylla (A. Gray) Straw -- accepted -- bush penstemon, snapdragon penstemon
	Keckiella antirrhinoides var. microphylla (A. Gray) N.H. Holmgren -- not accepted
	Keckiella lemmonii (A. Gray) Straw -- accepted -- bush beardtongue, Lemmon's keckiella
	Keckiella rothrockii (A. Gray) Straw -- accepted -- Rothrock's keckiella, Rothrock's penstemon
	Keckiella rothrockii ssp. rothrockii (A. Gray) Straw -- accepted -- Rothrock's keckiella, Rothrock's penstemon
	Keckiella rothrockii var. rothrockii (A. Gray) Straw -- not accepted
	Keckiella ternata (Torr. ex A. Gray) Straw -- accepted -- scarlet keckiella
	Keckiella ternata ssp. ternata (Torr. ex A. Gray) Straw -- accepted -- scarlet keckiella
	Keckiella ternata var. ternata (Torr. ex A. Gray) Straw -- not accepted
	Keerlia bellidifolia A. Gray & Engelm. -- not accepted
	Keerlia effusa A. Gray -- not accepted
	Koanophyllon palmeri (A. Gray) R.M. King & H. Rob. -- accepted -- Palmer's umbrella thoroughwort
	Koanophyllon solidaginifolium (A. Gray) R.M. King & H. Rob. -- accepted -- shrubby thoroughwort
	Koeleria cristata var. gracilis (Pers.) A. Gray -- not accepted
	Koellia albescens (Torr. & A. Gray) Kuntze -- not accepted
	Koellia clinopodioides (Torr. & A. Gray) Kuntze -- not accepted
	Koellia dubia (A. Gray) Small -- not accepted
	Koellia leptodon (A. Gray) Small -- not accepted
	Kopsiopsis strobilacea (A. Gray) Beck -- accepted -- California groundcone
	Kosteletzkya smilacifolia A. Gray -- not accepted
	Kosteletzkya virginica (L.) C. Presl ex A. Gray -- not accepted -- Virginia saltmarsh mallow
	Krameria ramosissima (A. Gray) S. Watson -- accepted -- manystem ratany, trailing ratany
	Kraunhia macrostachya (Torr. & A. Gray) Small -- not accepted
	Krigia wrightii (A. Gray) K.L. Chambers ex Kim -- accepted -- Wright's dwarfdandelion
	Krynitzkia crassisepala (Torr. & A. Gray) A. Gray -- not accepted
	Krynitzkia jamesii (Torr.) A. Gray -- not accepted
	Krynitzkia utahensis A. Gray -- not accepted
	Kuhnia eupatorioides var. corymbulosa Torr. & A. Gray -- not accepted
	Kuhnia eupatorioides var. gracilis Torr. & A. Gray -- not accepted
	Kuhnia eupatorioides var. gracillima A. Gray -- not accepted
	Kuhnia shaffneri A. Gray -- not accepted
	Kumlienia hystricula (A. Gray) Greene -- not accepted -- waterfall false buttercup
	Kyhosia bolanderi (A. Gray) B.G. Baldw. -- accepted -- Bolander's madia
	Labordia fagraeoidea var. sessilis (A. Gray) Sherff -- not accepted
	Labordia sessilis A. Gray -- accepted -- thinfruit labordia
	Labordia tinifolia A. Gray -- accepted -- paleflower labordia
	Labordia tinifolia var. tinifolia A. Gray -- accepted -- paleflower labordia
	Lachnostoma arizonicum A. Gray -- not accepted
	Lacinaria acidota (Engelm. & A. Gray) Kuntze -- not accepted
	Lacinaria boykinii (Torr. & A. Gray) Kuntze -- not accepted
	Lacinaria chapmanii (Torr. & A. Gray) Kuntze -- not accepted
	Lacinaria garberi (A. Gray) Kuntze -- not accepted
	Lactuca canadensis var. integrifolia (Bigelow) Torr. & A. Gray -- not accepted
	Lactuca hirsuta var. albiflora (Torr. & A. Gray) Shinners -- not accepted -- hairy lettuce
	Lactuca spicata var. integrifolia (Torr. & A. Gray) Britton -- not accepted
	Lactuca stolonifera (A. Gray) Maxim. -- not accepted
	Laennecia coulteri (A. Gray) G.L. Nesom -- accepted -- annual horsetail, conyza, Coulter's horseweed
	Laennecia eriophylla (A. Gray) G.L. Nesom -- accepted -- Cochise marshtail
	Lagophylla glandulosa A. Gray -- accepted -- glandular hareleaf
	Lagophylla glandulosa ssp. glandulosa A. Gray -- not accepted -- glandular hareleaf
	Langloisia matthewsii (A. Gray) Greene -- accepted
	Langloisia punctata (A. Gray ex Coville) Goodd. -- not accepted
	Langloisia setosissima (Torr. & A. Gray ex Torr.) Greene -- accepted -- Great Basin langloisia, moth langloisia
	Langloisia setosissima ssp. punctata (A. Gray ex Coville) Timbrook -- accepted -- Great Basin langloisia
	Langloisia setosissima ssp. setosissima (Torr. & A. Gray ex Torr.) Greene -- accepted -- Great Basin langloisia
	Laphamia angustifolia A. Gray -- not accepted
	Laphamia angustifolia ssp. laciniata (A. Gray) Niles -- not accepted
	Laphamia bisetosa Torr. ex A. Gray -- not accepted
	Laphamia cinerea A. Gray -- not accepted
	Laphamia halimifolia A. Gray -- not accepted
	Laphamia halimifolia ssp. lindheimeri (A. Gray) Niles -- not accepted
	Laphamia palmeri A. Gray -- not accepted
	Laphamia rupestris A. Gray -- not accepted
	Laphamia stansburii A. Gray -- not accepted
	Laphamia stansburyi A. Gray -- not accepted
	Lapithea boykinii (A. Gray) Small -- not accepted
	Lappula americana (A. Gray) Rydb. -- not accepted
	Lappula deflexa ssp. americana (A. Gray) Hult�n -- not accepted
	Lappula deflexa var. americana (A. Gray) Greene -- not accepted
	Lappula hispida (A. Gray) Greene -- not accepted
	Lappula occidentalis var. cupulata (A. Gray) Higgins -- accepted -- flat-spine sheepburr, flatspine stickseed
	Lappula redowskii var. cupulata (A. Gray) M.E. Jones -- not accepted
	Lasianthaea podocephala (A. Gray) K. Becker -- accepted -- San Pedro daisy
	Lasthenia californica ssp. macrantha (A. Gray) R. Chan -- accepted -- perennial goldfields
	Lasthenia chrysantha (Greene ex A. Gray) Greene -- accepted -- alkali sink goldfields
	Lasthenia debilis (Greene ex A. Gray) Ornduff -- accepted -- Greene's goldfields
	Lasthenia fremontii (Torr. ex A. Gray) Greene -- accepted -- Fremont's goldfields
	Lasthenia glabrata ssp. coulteri (A. Gray) Ornduff -- accepted -- Coulter's goldfields
	Lasthenia glabrata var. coulteri A. Gray -- not accepted
	Lasthenia leptalea (A. Gray) Ornduff -- accepted -- Salinas Valley goldfields
	Lasthenia macrantha (A. Gray) Greene -- not accepted -- perennial goldfields
	Lasthenia macrantha ssp. macrantha (A. Gray) Greene -- not accepted -- perennial goldfields
	Lasthenia maritima (A. Gray) Ornduff -- accepted -- seaside goldfields
	Lasthenia minor ssp. maritima (A. Gray) Ornduff -- not accepted
	Lasthenia minor var. maritima (A. Gray) Cronquist -- not accepted
	Lasthenia platycarpha (A. Gray) Greene -- accepted -- alkali goldfields
	Lathrocasis tenerrima (A. Gray) L.A. Johnson -- accepted -- delicate gilia
	Lathyrus palustris var. myrtifolius (Muhl. ex Willd.) A. Gray -- not accepted
	Lathyrus sulphureus W.H. Brewer ex A. Gray -- accepted -- snub pea, sulfur pea
	Lathyrus sulphureus var. sulphureus W.H. Brewer ex A. Gray -- accepted -- snub pea
	Lathyrus torreyi A. Gray -- accepted -- Torrey's pea
	Lavauxia brachycarpa (A. Gray) Britton -- not accepted
	Layia carnosa (Nutt.) Torr. & A. Gray -- accepted -- beach layia, beach tidytips
	Layia chrysanthemoides (DC.) A. Gray -- accepted -- smooth tidytips
	Layia fremontii (Torr. & A. Gray) A. Gray -- accepted -- Fremont's tidytips
	Layia jonesii A. Gray -- accepted -- Jones' tidytips
	Layia pentachaeta A. Gray -- accepted -- Sierra tidytips
	Layia pentachaeta ssp. pentachaeta A. Gray -- accepted -- Sierra tidytips
	Layia platyglossa (Fisch. & C.A. Mey.) A. Gray -- accepted -- coastal tidytips
	Layia platyglossa ssp. platyglossa (Fisch. & C.A. Mey.) A. Gray -- not accepted -- coastal tidytips
	Layia platyglossa var. breviseta A. Gray -- not accepted
	Leavenworthia stylosa A. Gray -- accepted -- cedar gladecress
	Leavenworthia torulosa A. Gray -- accepted -- necklace gladecress
	Lechea major var. divaricata (Shuttlw. ex Britton) A. Gray -- not accepted
	Lechea minor var. maritima (Legg. ex Britton, Sterns & Poggenb.) A. Gray -- not accepted
	Leiophyllum buxifolium var. prostratum (Loudon) A. Gray -- not accepted
	Lembertia congdonii (A. Gray) Greene -- not accepted -- San Joaquin woollythread, San Joaquin wooly-threads
	Lemmonia A. Gray -- not accepted
	Lemmonia californica A. Gray -- not accepted
	Lepachys columnaris (Pursh) Torr. & A. Gray -- not accepted
	Lepachys peduncularis Torr. & A. Gray -- not accepted
	Lepachys peduncularis var. picta A. Gray -- not accepted
	Lepachys pinnata (Vent.) Torr. & A. Gray -- not accepted
	Lepadena bicolor (Engelm. & A. Gray) Nieuwl. -- not accepted
	Lepechinia hastata (A. Gray) Epling -- accepted -- pakaha
	Lepidium acutidens (A. Gray) Howell -- accepted -- alkali pepperwort
	Lepidium alyssoides A. Gray -- accepted -- mesa pepperwort, southern pepperweed
	Lepidium alyssoides var. alyssoides A. Gray -- not accepted -- mesa pepperwort
	Lepidium dictyotum A. Gray -- accepted -- alkali pepperweed, net pepperweed
	Lepidium dictyotum var. acutidens A. Gray -- not accepted -- alkali pepperwort
	Lepidium dictyotum var. dictyotum A. Gray -- not accepted -- alkali pepperweed
	Lepidium lasiocarpum ssp. wrightii (A. Gray) Thell. -- accepted -- Wright's pepperweed
	Lepidium lasiocarpum var. wrightii (A. Gray) C.L. Hitchc. -- not accepted -- Wright's pepperweed
	Lepidium montanum ssp. alyssoides (A. Gray) C.L. Hitchc. -- not accepted
	Lepidium montanum var. alyssoides (A. Gray) M.E. Jones -- not accepted
	Lepidium oxycarpum Torr. & A. Gray -- accepted -- forked pepperweed
	Lepidium sordidum A. Gray -- accepted -- sordid pepperweed
	Lepidospartum (A. Gray) A. Gray -- accepted -- broomsage
	Lepidospartum squamatum (A. Gray) A. Gray -- accepted -- California broomsage, California scalebroom
	Lepidospartum squamatum var. palmeri (A. Gray) L.C. Wheeler -- not accepted
	Leptochloa fascicularis (Lam.) A. Gray -- not accepted -- bearded sprangletop, sprangletop
	Leptochloa fascicularis var. fascicularis (Lam.) A. Gray -- not accepted -- bearded sprangletop
	Leptodactylon nuttallii (A. Gray) Rydb. -- not accepted
	Leptodactylon pungens ssp. squarrosum (A. Gray) Tidestr. -- not accepted
	Leptodactylon watonii (A. Gray) Rydb. -- not accepted
	Leptodactylon watsonii (A. Gray) Rydb. -- not accepted -- Watson's prickly gilia, Watson's prickly phlox
	Leptoglossis texana (Torr.) A. Gray -- not accepted
	Leptopoda fimbriata Torr. & A. Gray non Leptopoda fimbriata (Michx.) Eaton -- not accepted
	Leptosiphon aureus ssp. decorus (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- golden linanthus
	Leptosiphon bolanderi (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Bolander's linanthus
	Leptosiphon breviculus (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Mojave linanthus
	Leptosiphon floribundum (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- many-flower linanthus
	Leptosiphon floribundum ssp. floribundum (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- manyflower linanthus
	Leptosiphon floribundus (A. Gray) J.M. Porter & L.A. Johnson -- not accepted
	Leptosiphon floribundus ssp. floribundus (A. Gray) J.M. Porter & L.A. Johnson -- not accepted
	Leptosiphon lemmonii (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Lemmon's linanthus
	Leptosiphon nuttallii (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Nuttall's linanthus
	Leptosiphon nuttallii ssp. nuttallii (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Nuttall's linanthus
	Leptosiphon rattanii (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Rattan's linanthus
	Leptosyne bigelovii (A. Gray) A. Gray -- not accepted
	Leptosyne stillmanii A. Gray -- not accepted
	Lespedeza capitata var. vulgaris Torr. & A. Gray -- not accepted
	Lespedeza hirta var. sparsiflora Torr. & A. Gray -- not accepted
	Lesquerella angustifolia (Nutt. ex Torr. & A. Gray) S. Watson -- not accepted -- annual bladderpod, thread-leaved bladderpod, threadleaf bladderpod
	Lesquerella argyraea (A. Gray) S. Watson -- not accepted -- bladderpod, silver bladderpod
	Lesquerella auriculata (Engelm. & A. Gray) S. Watson -- not accepted -- earleaf bladderpod
	Lesquerella densiflora (A. Gray) S. Watson -- not accepted -- denseflower bladderpod
	Lesquerella engelmannii (A. Gray) S. Watson -- not accepted -- Engelmann's bladderpod
	Lesquerella fendleri (A. Gray) S. Watson -- not accepted -- Fendler bladderpod, Fendler's bladderpod
	Lesquerella gordonii (A. Gray) S. Watson -- not accepted -- Gordon's bladderpod
	Lesquerella gordonii var. gordonii (A. Gray) S. Watson -- not accepted -- Gordon's bladderpod
	Lesquerella gracilis ssp. nuttallii (Torr. & A. Gray) Rollins & E.A. Shaw -- not accepted -- Nuttall's bladderpod
	Lesquerella lasiocarpa (Hook. ex A. Gray) S. Watson -- not accepted -- roughpod bladderpod
	Lesquerella lasiocarpa ssp. berlandieri (A. Gray) Rollins & E.A. Shaw -- not accepted
	Lesquerella lasiocarpa ssp. berlandieri var. berlandieri (A. Gray) Payson -- not accepted -- roughpod bladderpod
	Lesquerella lasiocarpa ssp. lasiocarpa (Hook. ex A. Gray) S. Watson -- not accepted -- roughpod bladderpod
	Lesquerella lasiocarpa var. berlandieri (A. Gray) Payson -- not accepted -- roughpod bladderpod
	Lesquerella lasiocarpa var. lasiocarpa (Hook. ex A. Gray) S. Watson -- not accepted -- roughpod bladderpod
	Lesquerella lescurii (A. Gray) S. Watson -- not accepted -- Lescur's bladderpod
	Lesquerella lindheimeri (A. Gray) S. Watson -- not accepted -- Lindheimer's bladderpod
	Lesquerella montana (A. Gray) S. Watson -- not accepted -- mountain bladderpod
	Lesquerella nuttallii (Torr. & A. Gray) S. Watson -- not accepted
	Lesquerella pallida (Torr. & A. Gray) S. Watson -- not accepted -- white bladderpod
	Lesquerella purpurea (A. Gray) S. Watson -- not accepted -- purple bladderpod, rose bladderpod
	Lesquerella purpurea var. purpurea (A. Gray) S. Watson -- not accepted
	Lesquerella recurvata (Engelm. ex A. Gray) S. Watson -- not accepted -- gaslight bladderpod
	Lessingia germanorum var. glandulifera (A. Gray) J.T. Howell -- not accepted
	Lessingia germanorum var. lemmonii (A. Gray) J.T. Howell -- not accepted
	Lessingia germanorum var. tenuis (A. Gray) J.T. Howell -- not accepted
	Lessingia glandulifera A. Gray -- accepted -- valley lessingia
	Lessingia glandulifera var. glandulifera A. Gray -- accepted -- Lemmon's lessingia, valley lessingia
	Lessingia lemmonii A. Gray -- not accepted -- Lemmon's bladderpod, Lemmon's lessingia, Lemmon's vinegar-weed
	Lessingia lemmonii var. lemmonii A. Gray -- not accepted -- Lemmon's lessingia, Lemmon's vinegarweed
	Lessingia leptoclada A. Gray -- accepted -- Sierra lessingia
	Lessingia nana A. Gray -- accepted -- dwarf lessingia
	Lessingia ramulosa A. Gray -- accepted -- Sonoma lessingia
	Lessingia ramulosa var. adenophora (Greene) A. Gray -- not accepted -- Sonoma lessingia
	Lessingia ramulosa var. ramulosa A. Gray -- not accepted -- Sonoma lessingia
	Lessingia tenuis (A. Gray) Coville -- accepted -- spring lessingia
	Lessingia virgata A. Gray -- accepted -- wand lessingia
	Lessingia virgata var. virgata A. Gray -- not accepted -- wand lessingia
	Leucampyx newberryi A. Gray -- not accepted
	Leuciva dealbata (A. Gray) Rydb. -- accepted -- woolly marsh elder
	Leucocrinum Nutt. ex A. Gray -- accepted -- starlily
	Leucocrinum montanum Nutt. ex A. Gray -- accepted -- common starlily, star-lily
	Leucophyllum minus A. Gray -- accepted -- Big Bend barometerbush, big bend cenizo
	Leucophysalis nana (A. Gray) Averett -- accepted -- dwarf chamaesaracha, dwarf leucophysalis
	Leucosyris carnosa (A. Gray) Greene -- not accepted
	Leucosyris carnosa var. intricata (A. Gray) Cronquist -- not accepted
	Leucothoe catesbaei (Walter) A. Gray -- not accepted
	Leucothoe davisiae Torr. ex A. Gray -- accepted -- Sierra laurel
	Leucothoe racemosa (L.) A. Gray -- not accepted -- swamp doghobble
	Leucothoe recurva (Buckley) A. Gray -- not accepted -- redtwig doghobble
	Levenworthia stylosa A. Gray -- not accepted
	Levenworthia torulosa A. Gray -- not accepted
	Lewisia brachycalyx Engelm. ex A. Gray -- accepted -- short-sepal bitter-root, shortsepal bitterroot, shortsepal lewisia
	Lewisia columbiana (Howell ex A. Gray) B.L. Rob. -- accepted -- Columbian lewisia
	Lewisia columbiana var. columbiana (Howell ex A. Gray) B.L. Rob. -- accepted -- Columbian lewisia
	Lewisia nevadensis (A. Gray) B.L. Rob. -- accepted -- Nevada bitter-root, Nevada bitterroot, Nevada lewisia
	Lewisia pygmaea (A. Gray) B.L. Rob. -- accepted -- alpine bitterroot, alpine lewisia, pigmy bitterroot
	Lewisia pygmaea var. nevadensis (A. Gray) Fosberg -- not accepted
	Lewisia pygmaea var. pygmaea (A. Gray) B.L. Rob. -- not accepted
	Lewisia tweedyi (A. Gray) B.L. Rob. -- not accepted
	Liatris acidota Engelm. & A. Gray -- accepted -- sharp blazing star, sharp gayfeather
	Liatris chapmanii Torr. & A. Gray -- accepted -- Chapman's blazing star
	Liatris compacta (Torr. & A. Gray) Rydb. -- accepted -- scaly blazing star
	Liatris garberi A. Gray -- accepted -- Garber's blazing star
	Liatris graminifolia var. dubia (W. Bartram) A. Gray -- not accepted
	Liatris scariosa var. squarrulosa (Michx.) A. Gray -- not accepted
	Liatris squarrosa var. compacta Torr. & A. Gray -- not accepted -- scaly blazing star
	Liatris X boykinii Torr. & A. Gray (pro sp.) -- accepted -- Boykin's gayfeather
	Ligularia amplectens (A. Gray) W.A. Weber -- not accepted
	Ligularia bigelovii (A. Gray) W.A. Weber -- not accepted
	Ligularia bigelovii var. hallii (A. Gray) W.A. Weber -- not accepted
	Ligularia dentata (A. Gray) H. Hara -- accepted -- summer ragwort
	Ligularia soldanella (A. Gray) W.A. Weber -- not accepted
	Ligularia taraxacoides (A. Gray) W.A. Weber -- not accepted
	Ligusticum apiifolium (Nutt. ex Torr. & A. Gray) A. Gray -- accepted -- celeryleaf licorice-root
	Limnorchis thurberi (A. Gray) Rydb. -- not accepted
	Limnosciadium pumilum (Engelm. & A. Gray) Mathias & Constance -- accepted -- prairie dogshade
	Limonium angustatum (A. Gray) Small -- not accepted
	Limonium carolinianum var. angustatum (A. Gray) S.F. Blake -- not accepted
	Limonium nashii var. angustatum (A. Gray) H.E. Ahles -- not accepted
	Linanthastrum floribundum (A. Gray) Wherry -- not accepted
	Linanthastrum nuttallii (A. Gray) Ewan -- not accepted
	Linanthastrum nuttallii ssp. floribundum (A. Gray) Ewan -- not accepted
	Linanthus aureus ssp. decorus (A. Gray) H. Mason -- not accepted -- golden deserttrumpets, golden linanthus
	Linanthus aureus var. decorus (A. Gray) Jeps. -- not accepted
	Linanthus bellus (A. Gray) Greene -- accepted -- desert beauty
	Linanthus bigelovii (A. Gray) Greene -- accepted -- Bigelow's deserttrumpets, Bigelow's linanthus
	Linanthus bigelovii var. jonesii (A. Gray) Jeps. & H. Mason -- not accepted
	Linanthus bolanderi (A. Gray) Greene -- not accepted -- Bolander's linanthus
	Linanthus breviculus (A. Gray) Greene -- not accepted -- Mojave linanthus
	Linanthus campanulatus (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- bellshape gilia
	Linanthus demissus (A. Gray) Greene -- accepted -- desert linanthus, desertsnow
	Linanthus filiformis (Parry ex A. Gray) J.M. Porter & L.A. Johnson -- accepted -- yellow gilia
	Linanthus floribundus (A. Gray) Greene ex Milliken -- not accepted -- manyflower deserttrumpets, manyflower linanthus
	Linanthus floribundus ssp. floribundus (A. Gray) Greene ex Milliken -- not accepted -- many-flower desert-trumpets, manyflower linanthus
	Linanthus jonesi (A. Gray) Greene -- not accepted
	Linanthus jonesii (A. Gray) Greene -- accepted -- Jones' desert-trumpets, Jones' linanthus
	Linanthus lemmonii (A. Gray) Greene -- not accepted -- Lemmon's linanthus
	Linanthus liniflorus var. pharnaceoides (Benth.) A. Gray -- not accepted
	Linanthus nuttallii (A. Gray) Greene ex Milliken -- not accepted -- Nuttall's desert-trumpets, Nuttall's deserttrumpets, Nuttall's linanthus
	Linanthus nuttallii ssp. floribundus (A. Gray) Munz -- not accepted
	Linanthus nuttallii ssp. nuttallii (A. Gray) Greene ex Milliken -- not accepted -- Nuttall's desert-trumpets, Nuttall's linanthus
	Linanthus orcuttii (Parry & A. Gray) Jeps. -- accepted -- Orcutt's linanthus
	Linanthus parryae (A. Gray) Greene -- accepted -- sandblossoms
	Linanthus rattanii (A. Gray) Greene -- not accepted -- Rattan's linanthus
	Linanthus watsonii (A. Gray) J.M. Porter & L.A. Johnson -- accepted -- Watson's prickly phlox
	Lindheimera A. Gray & Engelm. -- accepted -- lindheimera
	Lindheimera texana A. Gray & Engelm. -- accepted -- Texas star, Texas yellowstar
	Linosyris arborescens A. Gray -- not accepted
	Linosyris carnosa A. Gray -- not accepted
	Linosyris texana Torr. & A. Gray -- not accepted
	Linum adenophyllum A. Gray -- not accepted
	Linum breweri A. Gray -- not accepted
	Linum californicum var. confertum A. Gray ex Trel. -- not accepted
	Linum californicum var. congestum (A. Gray) Jeps. -- not accepted
	Linum congestum A. Gray -- not accepted
	Linum digynum A. Gray -- not accepted
	Linum micranthum A. Gray -- not accepted
	Linum rigidum var. berlandieri (Hook.) Torr. & A. Gray -- not accepted
	Linum rupestre (A. Gray) Engelm. ex A. Gray -- accepted -- rock flax
	Linum spergulinum A. Gray -- not accepted
	Lipocarpha occidentalis (A. Gray) G.C. Tucker -- accepted -- western halfchaff sedge
	Lipochaeta calycosa A. Gray -- not accepted
	Lipochaeta connata var. decurrens A. Gray -- not accepted
	Lipochaeta heterophylla A. Gray -- accepted -- lavaflow nehe
	Lipochaeta integrifolia (Nutt.) A. Gray -- not accepted -- Kure Atoll nehe
	Lipochaeta micrantha (Nutt.) A. Gray -- not accepted -- Kauai nehe, nehe
	Lipochaeta micrantha var. micrantha (Nutt.) A. Gray -- not accepted -- Kauai nehe
	Lipochaeta remyi A. Gray -- not accepted -- annual nehe
	Lipochaeta subcordata A. Gray -- not accepted -- grassland nehe
	Lipochaeta succulenta var. decurrens (A. Gray) Sherff -- not accepted
	Lipochaeta tenuifolia A. Gray -- not accepted -- nehe, Waianae Range nehe
	Lippia wrightii A. Gray -- not accepted
	Lithophragma (Nutt.) Torr. & A. Gray -- accepted -- woodland-star
	Lithophragma affine A. Gray -- accepted -- San Francisco woodland-star
	Lithophragma affine ssp. affine A. Gray -- not accepted -- San Francisco woodland-star
	Lithophragma bolanderi A. Gray -- accepted -- Bolander's woodland-star
	Lithophragma cymbalaria Torr. & A. Gray -- accepted -- mission woodland-star
	Lithospermum californicum A. Gray -- accepted -- California stoneseed
	Lithospermum multiflorum Torr. ex A. Gray -- accepted -- manyflowered gromwell, manyflowered stoneseed, purple pucoon
	Llyonothamnus A. Gray -- not accepted
	Llyonothamnus floribundus A. Gray -- not accepted
	Llyonothamnus floribundus var. floribundus A. Gray -- not accepted
	Lobelia amoena var. glandulifera A. Gray -- not accepted -- southern lobelia
	Lobelia appendiculata var. gattingeri (A. Gray) McVaugh -- not accepted -- Gattinger's lobelia
	Lobelia berlandieri ssp. brachypoda (A. Gray) Lammers -- accepted -- Berlandier's lobelia
	Lobelia berlandieri var. brachypoda (A. Gray) McVaugh -- not accepted -- Berlandier's lobelia
	Lobelia boykinii Torr. & A. Gray ex A. DC. -- accepted -- Boykin's lobelia
	Lobelia brachypoda (A. Gray) A. DC. ex Small -- not accepted
	Lobelia canbyi A. Gray -- accepted -- Canby's lobelia
	Lobelia canbyi var. canbyi A. Gray -- not accepted
	Lobelia dunnii ssp. dunnii var. serrata (A. Gray) McVaugh -- not accepted
	Lobelia dunnii var. serrata (A. Gray) McVaugh -- not accepted -- Dunn's lobelia
	Lobelia feayana A. Gray -- accepted -- bay lobelia
	Lobelia gattingeri A. Gray -- accepted -- Gattinger's lobelia
	Lobelia gaudichaudii var. kauaensis A. Gray -- not accepted
	Lobelia glandulifera (A. Gray) Small -- not accepted
	Lobelia hirtella (A. Gray) Greene -- not accepted
	Lobelia kauaensis (A. Gray) A. Heller -- not accepted -- lava lobelia
	Lobelia spicata var. hirtella A. Gray -- not accepted -- pale-spike lobelia, palespike lobelia
	Lobelia spicata var. parviflora A. Gray -- not accepted
	Lobelia X kauaiensis (A. Gray) A. Heller (pro sp.) -- accepted -- lava lobelia
	Loeselia effusa A. Gray -- not accepted
	Loeselia matthewsii A. Gray -- not accepted
	Loeselia tenuifolia A. Gray -- not accepted
	Loeseliastrum depressum (M.E. Jones ex A. Gray) J.M. Porter -- accepted -- depressed ipomopsis
	Loeseliastrum matthewsii (A. Gray) Timbrook -- not accepted -- desert calico
	Logfia arizonica (A. Gray) Holub -- accepted -- Arizona cottonrose
	Logfia depressa (A. Gray) Holub -- accepted -- dwarf cottonrose
	Lomatium bicolor var. leptocarpum (Torr. & A. Gray) Schlessman -- accepted -- Wasatch desert parsley, Wasatch desertparsley, Wasatch lomatium
	Lomatium dasycarpum (Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- woollyfruit desertparsley
	Lomatium dasycarpum ssp. dasycarpum (Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- woollyfruit desertparsley
	Lomatium daucifolium (Torr. & A. Gray) J.M. Coult. & Rose -- not accepted
	Lomatium divaricatum (Pursh) Nutt. ex Torr. & A. Gray -- not accepted
	Lomatium foeniculaceum ssp. daucifolium (Torr. & A. Gray) W.L. Theob. -- accepted -- carrot-leaf desert-parsley, desert biscuitroot
	Lomatium foeniculaceum var. daucifolium (Torr. & A. Gray) Cronquist -- not accepted
	Lomatium leptocarpum (Torr. & A. Gray) J.M. Coult. & Rose -- not accepted
	Lomatium lucidum (Nutt. ex Torr. & A. Gray) Jeps. -- accepted -- shiny biscuitroot
	Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- bigseed biscuitroot, bigseed lomatium, large-fruit desert-parsley, largefruit biscuitroot, long mamma
	Lomatium macrocarpum var. ellipticum (Torr. & A. Gray) Jeps. -- not accepted
	Lomatium nuttallii (A. Gray) J.F. Macbr. -- accepted -- Nuttall's biscuitroot
	Lomatium tenuifolium Nutt. ex Torr. & A. Gray -- not accepted
	Lomatium utriculatum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- common lomatium
	Lonicera albiflora Torr. & A. Gray -- accepted -- western white honeysuckle, white honeysuckle
	Lonicera albiflora var. dumosa (A. Gray) Rehder -- not accepted
	Lonicera caerulea var. villosa (Michx.) Torr. & A. Gray -- not accepted
	Lonicera dumosa A. Gray -- not accepted
	Lonicera hispidula (Lindl.) Douglas ex Torr. & A. Gray -- accepted -- pink honeysuckle
	Lonicera hispidula var. hispidula (Lindl.) Douglas ex Torr. & A. Gray -- accepted -- pink honeysuckle
	Lonicera hispidula var. vacillans A. Gray -- accepted -- pink honeysuckle
	Lonicera morrowii A. Gray -- accepted -- Morrow's honeysuckle
	Lonicera sullivantii A. Gray -- not accepted
	Lophochlaena refracta A. Gray -- not accepted
	Lorandersonia pulchella (A. Gray) Urbatsch, R.P. Roberts & Neubig -- accepted -- southwestern rabbitbrush
	Lotus argophyllus (A. Gray) Greene -- not accepted -- silver bird's-foot trefoil
	Lotus argophyllus var. argophyllus (A. Gray) Greene -- not accepted -- silver bird's-foot trefoil
	Lotus argophyllus var. fremontii (A. Gray) Ottley -- not accepted -- Fremont's birdsfoot trefoil
	Lotus heermannii var. orbicularis (A. Gray) Isely -- not accepted -- Heermann's bird's-foot trefoil
	Lotus oblongifolius var. nevadensis (A. Gray) Munz -- not accepted
	Lotus oblongifolius var. torreyi (A. Gray) Ottley -- not accepted
	Lotus oroboides var. nanus (A. Gray) Isely -- not accepted
	Lotus torreyi (A. Gray) Greene -- not accepted
	Lotus wrightii (A. Gray) Greene -- not accepted -- Wright deervetch, Wright's deervetch
	Lowellia aurea A. Gray -- not accepted
	Ludwigia cylindrica var. brachycarpa Torr. & A. Gray -- not accepted
	Ludwigia glandulosa ssp. brachycarpa (Torr. & A. Gray) C.I. Peng -- accepted -- cylindricfruit primrose-willow
	Ludwigia linearis var. puberula Engelm. & A. Gray -- not accepted
	Ludwigia spathulata Torr. & A. Gray -- accepted -- spoon primrose-willow
	Luffa cylindrica var. insularum (A. Gray) Cogn. -- not accepted
	Luina nardosmia (A. Gray) Cronquist -- not accepted
	Lupinus argenteus var. argophyllus (A. Gray) S. Watson -- not accepted
	Lupinus argenteus var. meionanthus (A. Gray) Barneby -- accepted -- Lake Tahoe lupine
	Lupinus argophyllus (A. Gray) Cockerell -- not accepted
	Lupinus aridus var. lobbii A. Gray ex S. Watson -- not accepted
	Lupinus aridus var. torreyi (A. Gray ex S. Watson) C.P. Sm. -- not accepted
	Lupinus breweri A. Gray -- accepted -- Brewer's lupine
	Lupinus breweri var. breweri A. Gray -- accepted -- Brewer's lupine
	Lupinus caudatus ssp. argophyllus (A. Gray) L.Ll. Phillips -- accepted -- Kellogg spurred lupine, Kellogg's spurred lupine
	Lupinus caudatus var. argophyllus (A. Gray) S.L. Welsh -- not accepted
	Lupinus danaus A. Gray -- not accepted
	Lupinus decumbens var. argophyllus A. Gray -- not accepted
	Lupinus falcifer Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
	Lupinus foliosus (Torr. & A. Gray) Nutt. ex Hook. -- not accepted
	Lupinus laxiflorus var. argophyllus (A. Gray) M.E. Jones -- not accepted
	Lupinus laxiflorus var. foliosus Torr. & A. Gray -- not accepted
	Lupinus laxiflorus var. tenellus (Douglas ex G. Don) Torr. & A. Gray -- not accepted
	Lupinus lepidus var. lobbii (A. Gray ex S. Watson) C.L. Hitchc. -- not accepted
	Lupinus lepidus var. torreyi (A. Gray ex S. Watson) Jeps. -- not accepted
	Lupinus lobbii (A. Gray ex S. Watson) A. Gray ex Greene -- not accepted
	Lupinus lyallii A. Gray -- accepted -- dwarf mountain lupine, Lyall's lupine
	Lupinus lyallii ssp. lyallii A. Gray -- accepted -- dwarf mountain lupine, Lyall's lupine
	Lupinus lyallii ssp. lyallii var. danaus (A. Gray) S. Watson -- not accepted -- dwarf mountain lupine, Lyall's lupine
	Lupinus lyallii ssp. lyallii var. lyallii A. Gray -- not accepted -- dwarf mountain lupine, Lyall's lupine
	Lupinus lyallii var. danaus (A. Gray) S. Watson -- accepted -- dwarf mountain lupine
	Lupinus lyallii var. lobbii (A. Gray ex S. Watson) C.P. Sm. -- not accepted
	Lupinus lyallii var. lyallii A. Gray -- accepted -- dwarf mountain lupine
	Lupinus meionanthus A. Gray -- not accepted -- Lake Tahoe lupine, Tahoe lupine
	Lupinus polyphyllus ssp. polyphyllus var. grandifolius (Lindl. ex J. Agardh) Torr. & A. Gray -- not accepted -- bigleaf lupine
	Lupinus polyphyllus var. grandifolius (Lindl. ex J. Agardh) Torr. & A. Gray -- accepted -- bigleaf lupine
	Lupinus sellulus ssp. sellulus var. lobbii (A. Gray ex S. Watson) B.J. Cox -- not accepted -- Donner Lake lupine, Lobb's lupine
	Lupinus sellulus var. lobbii (A. Gray ex S. Watson) B.J. Cox -- accepted -- Donner Lake lupine
	Lupinus villosus var. diffusus (Nutt.) Torr. & A. Gray -- not accepted
	Lycium andersonii A. Gray -- accepted -- Anderson wolfberry, Anderson's wolfberry, water jacket
	Lycium andersonii var. andersonii A. Gray -- accepted -- Anderson wolfberry, Anderson's wolfberry, water jacket
	Lycium andersonii var. wrightii A. Gray -- accepted -- water jacket, Wright wolfberry
	Lycium berlandieri var. parviflorum (A. Gray) A. Terracc. -- accepted -- Berlandier's wolfberry, small Berlandier wolfberry
	Lycium californicum Nutt. ex A. Gray -- accepted -- California desert-thorn, California wolfberry
	Lycium californicum var. arizonicum A. Gray -- accepted
	Lycium californicum var. californicum Nutt. ex A. Gray -- accepted -- California desert-thorn
	Lycium carolinianum var. sandwicense (A. Gray) C.L. Hitchc. -- not accepted
	Lycium cooperi A. Gray -- accepted -- Cooper wolfberry, Cooper's wolfberry, peach thorn
	Lycium exsertum A. Gray -- accepted -- Arizona desert-thorn, littleleaf wolfberry
	Lycium fremontii A. Gray -- accepted -- Fremont wolfberry, Fremont's desert-thorn
	Lycium macrodon A. Gray -- accepted -- desert wolfberry
	Lycium parishii A. Gray -- accepted -- Parish wolfberry, Parish's desert-thorn, Parish's wolfberry
	Lycium puberulum A. Gray -- accepted -- downy desert-thorn, downy wolfberry
	Lycium puberulum var. puberulum A. Gray -- accepted -- downy desert-thorn, downy desertthorn
	Lycium richii A. Gray -- not accepted -- Baja desert-thorn
	Lycium sandwicense A. Gray -- accepted -- Hawai'i desert-thorn
	Lycium shockleyi A. Gray -- accepted -- Shockley's desert-thorn, Shockley's wolfberry
	Lycium torreyi A. Gray -- accepted -- squawthorn, Torrey wolfberry, Torrey's wolfberry
	Lycopersicon esculentum var. cerasiforme (Dunal) A. Gray -- not accepted
	Lycopus lucidus ssp. americanus (A. Gray) Hult�n -- not accepted
	Lycopus lucidus var. americanus A. Gray -- not accepted
	Lycopus sessilifolius A. Gray -- not accepted
	Lygodesma grandiflora (Nutt.) Torr. & A. Gray -- not accepted
	Lygodesmia aphylla var. texana Torr. & A. Gray -- not accepted
	Lygodesmia bigelovii (A. Gray) Shinners -- not accepted
	Lygodesmia exigua (A. Gray) A. Gray -- not accepted
	Lygodesmia grandiflora (Nutt.) Torr. & A. Gray -- accepted -- largeflower skeletonplant, largeflower skeletonweed, rush-pink
	Lygodesmia grandiflora var. grandiflora (Nutt.) Torr. & A. Gray -- accepted
	Lygodesmia rostrata (A. Gray) A. Gray -- not accepted
	Lygodesmia texana (Torr. & A. Gray) Greene -- accepted -- Texas skeletonplant
	Lygodesmia thurberi (A. Gray) Shinners -- not accepted
	Lygodesmia wrightii (A. Gray) Shinners -- not accepted
	Lyonothamnus A. Gray -- accepted -- Catalina ironwood
	Lyonothamnus floribundus A. Gray -- accepted -- Catalina ironwood
	Lyonothamnus floribundus ssp. floribundus A. Gray -- not accepted -- Catalina ironwood
	Lysias hookeriana (Torr. ex A. Gray) Rydb. -- not accepted
	Lysimachia daphnoides (A. Gray) Hillebr. -- accepted -- lehua makanoe
	Lysimachia hillebrandii Hook. f. ex A. Gray -- accepted -- pua-hekili
	Lysimachia hillebrandii var. angustifolia A. Gray -- not accepted
	Lysimachia lanceolata var. angustifolia (Lam.) A. Gray -- not accepted
	Lysimachia lanceolata var. hybrida (Michx.) A. Gray -- not accepted
	Lysimachia X producta (A. Gray) Fernald (pro. sp.) -- accepted -- loosestrife
	Lysimachiopsis angustifolia (A. Gray) O. Deg. & I. Deg. -- not accepted
	Lythrum alatum var. lanceolatum (Elliott) Torr. & A. Gray ex Rothr. -- accepted -- winged lythrum
	Lythrum californicum Torr. & A. Gray -- accepted -- California loosestrife
	Macdougalia bigelovii (A. Gray) A. Heller -- not accepted
	Machaeranthera aurea (A. Gray) Shinners -- not accepted -- Houston tansyaster
	Machaeranthera bigelovii (A. Gray) Greene -- not accepted -- Bigelow's machaeranthera, Bigelow's tansy-aster, Bigelow's tansyaster
	Machaeranthera bigelovii var. bigelovii (A. Gray) Greene -- not accepted -- Bigelow tansyaster, Bigelow's tansyaster
	Machaeranthera blephariphylla (A. Gray) Shinners -- not accepted -- Texas tansyaster
	Machaeranthera canescens (Pursh) A. Gray -- not accepted -- hoary aster, hoary goldenweed, hoary machaeranthera, hoary tansy-aster, hoary tansyaster, purple aster
	Machaeranthera canescens ssp. canescens (Pursh) A. Gray -- not accepted -- hoary tansy-aster, hoary tansyaster, ironplant goldenweed
	Machaeranthera canescens ssp. canescens var. canescens (Pursh) A. Gray -- not accepted -- cutleaf goldenweed, hoary tansy-aster, hoary tansyaster, ironplant goldenweed, spiny goldenweed
	Machaeranthera canescens ssp. canescens var. incana (Lindl.) A. Gray -- not accepted -- cutleaf goldenweed, cutleaf machaeranthera, hoary tansyaster
	Machaeranthera canescens ssp. canescens var. shastensis (A. Gray) B.L. Turner -- not accepted -- Shasta machaeranthera, Shasta tansyaster
	Machaeranthera canescens ssp. glabra (A. Gray) B.L. Turner -- not accepted -- hoary tansyaster
	Machaeranthera canescens ssp. glabra var. glabra A. Gray -- not accepted -- hoary tansyaster
	Machaeranthera canescens var. canescens (Pursh) A. Gray -- not accepted -- hoary tansyaster
	Machaeranthera canescens var. glabra A. Gray -- not accepted -- hoary tansyaster
	Machaeranthera canescens var. latifolia (A. Nelson) S.L. Welsh, non A. Gray -- not accepted
	Machaeranthera canescens var. latifolia A. Gray -- not accepted
	Machaeranthera canescens var. shastensis (A. Gray) B.L. Turner -- not accepted -- Shasta tansyaster
	Machaeranthera canescens var. tephrodes A. Gray -- not accepted
	Machaeranthera canescens var. viridis A. Gray -- not accepted
	Machaeranthera carnosa (A. Gray) G.L. Nesom -- not accepted -- shrubby alkali aster, shrubby alkali tansyaster, shrubby alkaliaster
	Machaeranthera carnosa var. carnosa (A. Gray) G.L. Nesom -- not accepted -- shrubby alkaliaster
	Machaeranthera carnosa var. intricata (A. Gray) G.L. Nesom -- not accepted -- shrubby alkaliaster
	Machaeranthera coloradoensis (A. Gray) Osterh. -- not accepted -- Colorado tansyaster
	Machaeranthera coloradoensis var. coloradoensis (A. Gray) Osterh. -- not accepted -- Colorado tansyaster
	Machaeranthera eradiata (A. Gray) Howell -- not accepted
	Machaeranthera parviflora A. Gray -- not accepted -- small-flower tansy-aster, smallflower tansyaster
	Machaeranthera pattersonii (A. Gray) Greene -- not accepted
	Machaeranthera pruinosa A. Gray -- not accepted
	Machaeranthera pygmaea (A. Gray) Woot. & Standl. -- not accepted
	Machaeranthera shastensis A. Gray -- not accepted
	Machaeranthera shastensis var. eradiata (A. Gray) Cronquist & D.D. Keck -- not accepted
	Machaeranthera sonorae (A. Gray) J. Stucky -- not accepted
	Machaeranthera tephrodes (A. Gray) Greene -- not accepted
	Machaeranthera tortifolia (Torr. & A. Gray) Cronquist & D.D. Keck -- not accepted
	Machaeranthera wrightii (A. Gray) Cronquist & D.D. Keck -- not accepted
	Macromeria viridiflora var. thurberi (A. Gray) I.M. Johnst. -- not accepted -- Thurber's giant-trumpets
	Macronema greenei (A. Gray) Greene -- not accepted
	Macronema watsonii (A. Gray) Greene -- not accepted
	Macroptilium heterophyllum var. rotundifolium (A. Gray) Mar�chal, Mascherpa & Stainier -- not accepted
	Macrosiphonia brachysiphon (Torr.) A. Gray -- not accepted -- Huachuca Mountain rocktrumpet
	Madia bolanderi (A. Gray) A. Gray -- not accepted -- Bolander's madia
	Madia dissitiflora (Nutt.) Torr. & A. Gray -- not accepted
	Madia elegans ssp. wheeleri (A. Gray) D.D. Keck -- not accepted -- Wheeler's tarweed
	Madia exigua (Sm.) A. Gray -- accepted -- small tarweed
	Madia minima (A. Gray) D.D. Keck -- not accepted -- least tarweed, oppositeleaved tarweed
	Madia sativa var. congesta Torr. & A. Gray -- not accepted
	Madia yosemitana Parry ex A. Gray -- not accepted -- Yosemite tarweed
	Mahonia nevinii (A. Gray) Fedde -- not accepted -- Nevin's barberry
	Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene -- accepted -- chaparral bushmallow, Mendocino bushmallow
	Malacothamnus fasciculatus ssp. laxiflorus (A. Gray) Thorne -- not accepted
	Malacothamnus fasciculatus var. laxiflorus (A. Gray) Kearney -- not accepted
	Malacothamnus fremontii (Torr. ex A. Gray) Torr. ex Greene -- accepted -- Fremon's bushmallow
	Malacothamnus paniculatus (A. Gray) Kearney -- not accepted
	Malacothrix californica var. glabrata A. Gray ex D.C. Eaton -- not accepted
	Malacothrix clevelandii A. Gray -- accepted -- Cleveland's desert dandelion, Cleveland's desertdandelion
	Malacothrix coulteri Harv. & A. Gray -- accepted -- snake's head, snake's-head, snakehead desert dandelion
	Malacothrix fendleri A. Gray -- accepted -- Fendler's desert dandelion, Fendler's desertdandelion
	Malacothrix foliosa A. Gray -- accepted -- leafy desertdandelion
	Malacothrix foliosa ssp. foliosa A. Gray -- accepted -- leafy desertdandelion
	Malacothrix glabrata (A. Gray ex D.C. Eaton) A. Gray -- accepted -- smooth desert dandelion, smooth desertdandelion
	Malacothrix incana (Nutt.) Torr. & A. Gray -- accepted -- dunedelion
	Malacothrix platyphylla A. Gray -- not accepted
	Malacothrix saxatilis (Nutt.) Torr. & A. Gray -- accepted -- cliff desert dandelion, cliff desertdandelion
	Malacothrix saxatilis var. commutata (Torr. & A. Gray) Ferris -- accepted -- cliff desertdandelion
	Malacothrix saxatilis var. saxatilis (Nutt.) Torr. & A. Gray -- accepted -- cliff desertdandelion
	Malacothrix saxatilis var. tenuifolia (Nutt.) A. Gray -- accepted -- cliff desert dandelion, cliff desertdandelion
	Malacothrix sonchoides (Nutt.) Torr. & A. Gray -- accepted -- sowthistle desert dandelion, sowthistle desertdandelion, yellow-saucers
	Malacothrix sonchoides var. torreyi (A. Gray) E.W. Williams -- not accepted
	Malacothrix tenuifolia (Nutt.) Torr. & A. Gray -- not accepted
	Malacothrix torreyi A. Gray -- accepted -- Mohave aster, Torrey's desert dandelion, Torrey's desertdandelion
	Malacothrix xanthii A. Gray -- accepted
	Malaxis brachypoda (A. Gray) Fernald -- not accepted -- adder's-mouth, white adder's-mouth orchid
	Malaxis monophyllos ssp. brachypoda (A. Gray) �. L�ve & D. L�ve -- not accepted
	Malaxis monophyllos var. brachypoda (A. Gray) F. Morris & E.A. Eames -- accepted
	Malva fasciculata Nutt. ex Torr. & A. Gray -- not accepted
	Malva involucrata Torr. & A. Gray -- not accepted
	Malvastrum A. Gray -- accepted -- cheeseweed, false mallow
	Malvastrum angustum A. Gray -- not accepted -- narrow-leaved false mallow
	Malvastrum capense (L.) A. Gray & Harv. -- not accepted
	Malvastrum coccineum (Nutt.) A. Gray -- not accepted
	Malvastrum coccineum var. dissectum (Nutt. ex Torr. & A. Gray) A. Gray -- not accepted
	Malvastrum exile A. Gray -- not accepted
	Malvastrum fasciculatum (Nutt. ex Torr. & A. Gray) Greene -- not accepted
	Malvastrum fasciculatum var. laxiflorum (A. Gray) Munz & I.M. Johnst. -- not accepted
	Malvastrum fremontii Torr. ex A. Gray -- not accepted
	Malvastrum grossulariifolium (Hook. & Arn.) A. Gray -- not accepted
	Malvastrum laxiflorum (A. Gray) Davidson & Moxley -- not accepted
	Malvastrum leptophyllum A. Gray -- not accepted
	Malvastrum munroanum (Douglas ex Lindl.) A. Gray -- not accepted
	Malvastrum pedatifidum A. Gray -- not accepted
	Malvastrum rotundifolium A. Gray -- not accepted
	Malvastrum spicatum (L.) A. Gray -- not accepted
	Malvastrum wrightii A. Gray -- not accepted
	Malvaviscus arboreus var. drummondii (Torr. & A. Gray) Schery -- accepted -- wax mallow
	Malvaviscus drummondii Torr. & A. Gray -- not accepted
	Malvella lepidota (A. Gray) Fryxell -- accepted -- scurfy mallow, scurfymallow
	Malvella sagittifolia (A. Gray) Fryxell -- accepted -- arrowleaf mallow
	Malveopsis leptophylla (A. Gray) Kuntze -- not accepted
	Mancoa pubens (A. Gray) Rollins -- not accepted -- Trans-Pecos cress, Transpecos cress
	Marah oregana (Torr. & A. Gray) Howell -- accepted -- coastal manroot, western wildcucumber
	Marah oreganus (Torr. & A. Gray) Howell -- not accepted -- coastal manroot, western wildcucumber
	Margaranthus lemmonii A. Gray -- not accepted -- Lemmon's globe berry
	Marina calycosa (A. Gray) Barneby -- accepted -- San Pedro false prairie-clover, San Pedro false prairieclover
	Marina parryi (Torr. & A. Gray) Barneby -- accepted -- Parry dalea, Parry's false prairie-clover, Parry's indigobush
	Matelea arizonica (A. Gray) Shinners -- not accepted -- Arizona milkvine
	Matelea cordifolia (A. Gray) Woodson -- accepted -- Sonoran milkvine
	Matelea cynanchoides (Engelm. & A. Gray) Woodson -- accepted -- prairie milkvine
	Matelea pringlei (A. Gray) Woodson -- accepted -- Pringle's milkvine
	Matelea reticulata (Engelm. ex A. Gray) Woodson -- accepted -- netted milkvine
	Matelea sagittifolia (A. Gray) Woodson ex Shinners -- accepted -- arrowleaf matelea, arrowleaf milkvine
	Matelea shortii (A. Gray) Woodson -- not accepted
	Maurandella (A. Gray) Rothm. -- accepted
	Maurandya wislizeni Engelm. ex A. Gray -- not accepted
	Maurandya wislizenii Engelm. ex A. Gray -- not accepted
	Maximowiczia lindheimeri (A. Gray) Cogn. -- not accepted
	Maximowiczia lindheimeri var. tenuisecta (A. Gray) Cogn. -- not accepted
	Medinilla heterophylla A. Gray -- accepted
	Megapterium brachycarpum (A. Gray) H. L�v. -- not accepted
	Megarrhiza oregana (Torr. & A. Gray) S. Watson -- not accepted
	Meibomia batocaulis (A. Gray) Kuntze -- not accepted
	Meibomia cinerascens (A. Gray) Kuntze -- not accepted
	Meibomia grahamii (A. Gray) Kuntze -- not accepted
	Meibomia graminea (A. Gray) Kuntze -- not accepted
	Meibomia illinoensis (A. Gray) Kuntze -- not accepted
	Meibomia lineata var. polymorpha (A. Gray) Vail -- not accepted
	Meibomia longifolia (Torr. & A. Gray) Vail -- not accepted
	Meibomia neomexicana (A. Gray) Kuntze -- not accepted
	Meibomia polymorpha (A. Gray) Small -- not accepted
	Meibomia pubens (Torr. & A. Gray) Rydb. -- not accepted
	Meibomia tenuifolia (Torr. & A. Gray) Kuntze -- not accepted
	Meibomia wrightii (Engelm. ex A. Gray) Kuntze -- not accepted
	Melampodium cinereum var. ramosissimum (DC.) A. Gray -- not accepted -- hoary blackfoot
	Melampodium leucanthum Torr. & A. Gray -- accepted -- plains blackfoot, plains blackfoot daisy
	Melampodium longicorne A. Gray -- accepted -- Arizona blackfoot
	Melanobatus leucodermis (Douglas ex Torr. & A. Gray) Greene -- not accepted
	Melanthera remyi (A. Gray) W.L. Wagner & H. Rob. -- accepted -- annual nehe
	Melanthera subcordata (A. Gray) W.L. Wagner & H. Rob. -- accepted
	Melanthera tenuifolia (A. Gray) W.L. Wagner & H. Rob. -- accepted -- Waianae Range nehe
	Melica bromoides Bol. ex A. Gray -- not accepted
	Melica bromoides var. bromoides Bol. ex A. Gray -- not accepted
	Melica mutica var. diffusa (Pursh) A. Gray -- not accepted
	Melica mutica var. glabra (Michx.) A. Gray -- not accepted
	Melica smithii (Porter ex A. Gray) Vasey -- accepted -- m�lique de Smith, smith melic grass, Smith oniongrass, Smith's melicgrass
	Melicope barbigera A. Gray -- accepted -- uahiapele
	Melicope cinerea A. Gray -- accepted -- manena
	Melicope clusiifolia (A. Gray) T.G. Hartley & B.C. Stone -- accepted -- kukaemoa
	Melicope elliptica A. Gray -- accepted -- leiohi'iaka
	Melicope rotundifolia (A. Gray) T.G. Hartley & B.C. Stone -- accepted -- roundleaf melicope
	Melicope volcanica (A. Gray) T.G. Hartley & B.C. Stone -- accepted -- volcanic melicope
	Mellichampia A. Gray -- not accepted
	Melochia hirsuta var. glabrescens (C. Presl) A. Gray -- not accepted
	Melothria grandifolia Torr. & A. Gray -- not accepted
	Menodora decemfida (Gillies ex Hook. & Arn.) A. Gray -- accepted -- tenfinger menodora
	Menodora longiflora A. Gray -- accepted -- showy menodora
	Menodora scabra A. Gray -- accepted -- rough menodora
	Menodora scabra var. glabrescens A. Gray -- not accepted
	Menodora scabra var. scabra A. Gray -- not accepted -- rough menodora
	Menodora scoparia Engelm. ex A. Gray -- not accepted
	Menodora spinescens A. Gray -- accepted -- spiny menodora
	Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray -- accepted -- white blazingstar, white-stemmed evening-star, whitestem blazingstar, whitestem stickleaf
	Mentzelia albicaulis var. albicaulis (Hook.) Torr. & A. Gray -- not accepted -- whitestem blazingstar
	Mentzelia congesta Nutt. ex Torr. & A. Gray -- accepted -- united blazingstar, Ventana blazingstar
	Mentzelia congesta var. congesta Nutt. ex Torr. & A. Gray -- not accepted -- Ventana blazingstar
	Mentzelia floridana Nutt. ex Torr. & A. Gray -- accepted -- poorman's patch
	Mentzelia gracilenta Torr. & A. Gray -- accepted -- grass blazingstar
	Mentzelia humilis (A. Gray) J. Darl. -- accepted -- gypsum blazingstar
	Mentzelia humilis var. humilis (A. Gray) J. Darl. -- accepted -- gypsum blazingstar
	Mentzelia laevicaulis (Hook.) Torr. & A. Gray -- accepted -- blazingstar mentzelia, smoothstem blazingstar
	Mentzelia laevicaulis var. laevicaulis (Hook.) Torr. & A. Gray -- accepted -- smoothstem blazingstar
	Mentzelia lindleyi Torr. & A. Gray -- accepted -- Lindley's blazingstar
	Mentzelia micrantha (Hook. & Arn.) Torr. & A. Gray -- accepted -- San Luis blazingstar
	Mentzelia multiflora (Nutt.) A. Gray -- accepted -- Adonis blazingstar, Adonis stickleaf, desert blazingstar, manyflowered mentzelia
	Mentzelia multiflora var. multiflora (Nutt.) A. Gray -- accepted -- Adonis blazingstar, multiflower stickleaf
	Mentzelia nuda (Pursh) Torr. & A. Gray -- accepted -- bractless blazingstar, goodmother, stickleaf mentzelia
	Mentzelia nuda var. nuda (Pursh) Torr. & A. Gray -- accepted -- bractless blazingstar
	Mentzelia pumila Nutt. ex Torr. & A. Gray -- accepted -- dwarf blazingstar, dwarf mentzelia, golden blazingstar
	Mentzelia pumila var. pumila Nutt. ex Torr. & A. Gray -- accepted -- dwarf mentzelia, dwarf stickleaf, golden blazingstar
	Mentzelia torreyi A. Gray -- accepted -- Torrey's blazingstar
	Mentzelia torreyi var. torreyi A. Gray -- accepted -- Torrey's blazingstar
	Mentzelia tricuspis A. Gray -- accepted -- desert blazingstar, spinyhair blazingstar, spinyha