Integrated Taxonomic Information System - Search Results

Results of: Search in every Kingdom for Taxon Author(s) Name(s) Hook. OR Hook 'Hook.'
 
 Kingdom Plantae
  Acer douglasii Hook. – not accepted
  Achillea multiflora Hook. – not accepted
  Achimenes argyrostigma Hook. – not accepted
  Achimenes cupreata Hook. – not accepted
  Achimenes ocellata Hook. – not accepted
  Acroclinium roseum Hook. – not accepted
  Adenocaulon Hook. – accepted – trailplant
  Adenocaulon bicolor Hook. – accepted – American trailplant
  Adiantum wilsonii Hook. – accepted – Wilson's maidenhair
  Aeschynanthus cordifolius Hook. – accepted
  Aeschynanthus lobbianus Hook. – not accepted
  Aeschynanthus speciosus Hook. – accepted
  Aeschynanthus tricolor Hook. – accepted
  Agave maculosa Hook. – not accepted
  Agrimonia eupatoria var. parviflora Hook. – not accepted
  Agrostis exarata var. minor Hook. – not accepted – minor spike bentgrass
  Aira elongata Hook. – not accepted
  Aira latifolia Hook. – not accepted
  Allamanda neriifolia Hook. – not accepted
  Allium acuminatum Hook. – accepted – taper-tip onion, tapertip onion
  Allium douglasii Hook. – accepted – Douglas' onion
  Alloplectus capitatus Hook. – not accepted
  Alloplectus concolor Hook. – not accepted
  Alloplectus repens Hook. – not accepted
  Alsophila obtusiloba Hook. – accepted
  Alsophila podophylla Hook. – accepted
  Alsophila ramispina Hook. – accepted
  Alsophila salvinii Hook. – accepted
  Ambrosia acanthicarpa Hook. – accepted – flatspine bur ragweed, flatspine burr ragweed, bursage, bursage ragweed, flat-spine burr-ragweed, annual bursage, sand bursage
  Amelanchier ovalis var. semiintegrifolia Hook. – not accepted
  Amygdalus glandulosa Hook. – not accepted
  Andreaea nivalis Hook. – accepted
  Andromeda phillyreifolia Hook. – not accepted
  Anemone deltoidea Hook. – accepted – Columbian windflower
  Anemone richardsonii Hook. – accepted – yellow thimbleweed
  Angelonia gardneri Hook. – accepted
  Anigozanthos pulcherrimus Hook. – accepted
  Antennaria carpathica var. lanata Hook. – not accepted
  Antennaria carpathica var. pulcherrima Hook. – not accepted
  Antennaria carpatica var. humilis Hook. – not accepted
  Antennaria carpatica var. lanata Hook. – not accepted
  Antennaria carpatica var. pulcherrima Hook. – not accepted
  Antennaria racemosa Hook. – accepted – raceme pussytoes
  Aquilegia brevistyla Hook. – accepted – smallflower columbine
  Aquilegia caerulea var. ochroleuca Hook. – not accepted – white Colorado columbine
  Aquilegia canadensis var. hybrida Hook. – not accepted
  Aquilegia coerulea var. ochroleuca Hook. – accepted – white Colorado columbine
  Aralia papyrifera Hook. – not accepted – rice-paper plant, Chinese rice-paper plant
  Araucaria bidwillii Hook. – accepted – bunya bunya
  Arenaria macrophylla Hook. – not accepted
  Arenaria peploides var. major Hook. – not accepted
  Arnica cordifolia Hook. – accepted – heartleaf arnica, heart-leaf leopardbane
  Arnica mollis Hook. – accepted – hairy arnica, wooly arnica
  Artemisia borealis var. purshii Hook. – not accepted
  Asplenium dalhousiae Hook. – accepted – Countess Dalhousie's spleenwort
  Aster patens var. gracilis Hook. – not accepted – late purple aster
  Aster unalaschkensis var. major Hook. – not accepted
  Astragalus adsurgens var. robustior Hook. – not accepted – prairie milkvetch
  Astragalus hypoglottis Hook. – not accepted
  Astragalus lotiflorus Hook. – accepted – lotus milkvetch, lotus milk-vetch, milkvetch, low milkvetch
  Atriplex gordonii Hook. – not accepted
  Begonia coccinea Hook. – accepted – scarlet begonia
  Berberis darwinii Hook. – accepted – Darwin's berberis
  Betula occidentalis Hook. – accepted – water birch
  Blechnum occidentale var. minor Hook. – accepted – hammock fern
  Blepharipappus Hook. – accepted – blepharipappus
  Blepharipappus scaber Hook. – accepted – rough eyelashweed, blepharipappus
  Blepharipappus scaber ssp. scaber Hook. – not accepted – rough eyelashweed
  Bowringia Hook. – not accepted
  Braya arctica Hook. – not accepted
  Braya pilosa Hook. – accepted – hairy braya
  Bromus purgans var. longispicatus Hook. – not accepted
  Bromus purgans var. pallidus Hook. – not accepted
  Bromus purgans var. purpurascens Hook. – not accepted
  Bromus purgans var. vulgaris Hook. – not accepted
  Bryum andicola Hook. – not accepted
  Bryum cellulare Hook. – not accepted
  Bryum demissum Hook. – not accepted
  Bryum nitens Hook. – not accepted
  Bryum pellucens Hook. – not accepted
  Calamagrostis longifolia Hook. – not accepted
  Calanthera Hook. – not accepted
  Cardamine angulata Hook. – accepted – seaside bittercress
  Cardamine pratensis var. angustifolia Hook. – not accepted – cuckoo flower
  Carex membranacea Hook. – accepted – fragile sedge
  Centrosolenia bractescens Hook. – not accepted
  Centrosolenia picta Hook. – not accepted
  Ceratochloa breviaristata Hook. – not accepted
  Ceratochloa grandiflora Hook. – not accepted
  Cereus lamairei Hook. – not accepted
  Cereus lemairei Hook. – not accepted
  Ceropegia attenuata Hook. – accepted
  Ceropegia oculata var. subhirsuta Hook. – not accepted
  Ceropegia thwaitesii Hook. – accepted
  Ceropegia vincaefolia Hook. – not accepted
  Ceropegia vincifolia Hook. – accepted
  Chaerophyllum tainturieri Hook. – accepted – chervil, hairy-fruit chervil, hairyfruit chervil
  Chaerophyllum tainturieri var. tainturieri Hook. – accepted – hairyfruit chervil
  Cheilanthes fendleri Hook. – accepted – Fendler's lipfern
  Cheilanthes lindheimeri Hook. – accepted – fairyswords, fairy swords, Lindheimer's lipfern
  Cheilanthes wrightii Hook. – accepted – Wright's lip fern, Wright's lipfern
  Chenopodium humile Hook. – not accepted – marshland goosefoot
  Chirita zeylanica Hook. – accepted
  Cibotium menziesii Hook. – accepted – hapu'u li
  Cicuta maculata var. angustifolia Hook. – accepted – common water hemlock, poison parsnip, spotted cowbane, spotted parsley, water hemlock, spotted water-hemlock, spotted water hemlock
  Cleome lutea Hook. – not accepted – yellow beeplant, yellow spiderflower
  Cleome lutea var. lutea Hook. – not accepted – yellow spiderflower
  Clivia gardenii Hook. – accepted
  Coldenia nuttallii Hook. – not accepted
  Colpodium pauciflorum Hook. – not accepted
  Columnea aureonitens Hook. – not accepted
  Commelina deficiens Hook. – not accepted
  Condalia obovata Hook. – not accepted
  Conradia calycosa Hook. – not accepted
  Coreopsis longipes Hook. – not accepted
  Corispermum hyssopifolium var. rubricaule Hook. – not accepted
  Correa backhouseana Hook. – accepted
  Correa backhousiana Hook. – not accepted – Backhous fuchsia
  Corydalis scouleri Hook. – accepted – Scouler's fumewort
  Crepis elegans Hook. – accepted – elegant hawksbeard
  Crocidium Hook. – accepted – spring-gold
  Crocidium multicaule Hook. – accepted – common spring-gold
  Crotalaria crassipes Hook. – not accepted
  Croton setiger Hook. – accepted – turkey mullein, dove weed
  Croton setigerus Hook. – not accepted – dove weed
  Cyathea aneitensis Hook. – not accepted
  Cyathea assimilis Hook. – not accepted
  Cyathea camerooniana Hook. – not accepted
  Cyathea camerooniana var. camerooniana Hook. – not accepted
  Cyathea gardneri Hook. – not accepted
  Cyathea imrayana Hook. – not accepted
  Cyathea imrayana var. imrayana Hook. – not accepted
  Cyathea imrayana var. subnudata Hook. – not accepted
  Cyathea kirkii Hook. – accepted
  Cyathea lindsayana Hook. – accepted
  Cyathea manniana Hook. – not accepted
  Cyathea milnei Hook. – not accepted
  Cyathea sprucei Hook. – not accepted
  Cyathea walkerae Hook. – not accepted
  Cyathea walkerae var. tripinnata Hook. – not accepted
  Cyathea walkerae var. walkerae Hook. – not accepted
  Cyathea welwitschii Hook. – not accepted
  Cyrtodeira cupreata var. viridifolia Hook. – not accepted
  Cystopteris douglasii Hook. – accepted – Douglas' bladderfern
  Davallia fejeensis Hook. – accepted – lacy hare's-foot fern
  Delphinium cardinale Hook. – accepted – scarlet larkspur
  Diastema ochroleucum Hook. – not accepted
  Dicksonia sellowiana Hook. – accepted
  Dicranum fulvum Hook. – accepted
  Didymocarpus rexii Hook. – not accepted
  Diplopappus pinnatifidus Hook. – not accepted
  Dodecatheon dentatum Hook. – not accepted – white shootingstar
  Dodecatheon dentatum ssp. dentatum Hook. – not accepted – white shootingstar
  Douglasia arctica Hook. – not accepted – Mackenzie River dwarf-primrose
  Draba alpina var. nana Hook. – not accepted
  Draba micropetala Hook. – accepted
  Draba oligosperma Hook. – accepted – glacier draba, fewseed draba
  Draba oligosperma var. oligosperma Hook. – not accepted
  Drummondia Hook. – accepted
  Echinocactus cinnabarinus Hook. – not accepted
  Echinocactus pentlandii Hook. – not accepted
  Elymus virginicus var. submuticus Hook. – not accepted – Virginia wildrye
  Encephalartos horridus var. trispinosus Hook. – not accepted
  Encyclia Hook. – accepted – butterfly orchid
  Epidendrum bicornutum Hook. – not accepted
  Epidendrum pallidiflorum Hook. – accepted – Caribbean star orchid
  Epidendrum parkinsonianum Hook. – accepted
  Epidendrum pygmaeum Hook. – not accepted
  Epidendrum viridipurpureum Hook. – accepted
  Episcia bicolor Hook. – not accepted
  Erigeron alpinus var. elatus Hook. – not accepted
  Erigeron compositus var. typicus Hook. – not accepted
  Erigeron glabellus var. pubescens Hook. – accepted – streamside fleabane, fleabane
  Erigeron grandiflorus Hook. – accepted – largeflower fleabane, onestem fleabane
  Erigeron grandiflorus ssp. grandiflorus Hook. – not accepted – largeflower fleabane
  Erigeron lanatus Hook. – accepted – woolly fleabane, hairy daisy
  Erigeron lonchophyllus Hook. – accepted – shortray fleabane, low-meadow fleabane, vergerette à feuilles fines, short-ray boreal-daisy, shortray boreal daisy, spearleaf daisy
  Erigeron radiatus Hook. – not accepted
  Erigeron radicatus Hook. – accepted – taproot fleabane, Huber's fleabane, tap-root fleabane
  Erigeron trifidus Hook. – accepted – Alberta fleabane
  Eriogonum compositum var. leianthum Hook. – accepted – arrowleaf buckwheat
  Eriogonum divaricatum Hook. – accepted – divergent buckwheat, divergent wild buckwheat
  Eriogonum microthecum var. laxiflorum Hook. – accepted – slender buckwheat
  Eriogonum pyrolifolium Hook. – accepted – Shasta buckwheat
  Eriogonum pyrolifolium var. pyrolifolium Hook. – accepted – Shasta buckwheat
  Eriogonum umbellatum var. majus Hook. – accepted – sulphur-flower buckwheat
  Eriogynia Hook. – not accepted
  Eryngium articulatum Hook. – accepted – beethistle
  Eryngium petiolatum Hook. – accepted – rushleaf eryngo
  Eucalyptus citriodora Hook. – not accepted – lemonscented gum
  Eucalyptus macrocarpa Hook. – accepted – mottlecah
  Eucalyptus maculata Hook. – accepted – spotted gum, eucalyptus
  Eucalyptus platypus Hook. – accepted
  Eucalyptus spathulata Hook. – accepted – eucalyptus
  Eucalyptus spathulata ssp. spathulata Hook. – accepted – eucalyptus
  Eupatorium occidentale Hook. – not accepted
  Euphorbia alata Hook. – accepted
  Euphorbia jacquiniiflora Hook. – not accepted
  Euphorbia monteiroi Hook. – accepted
  Euphorbia monteiroi ssp. monteiroi Hook. – accepted
  Fadyenia Hook. – not accepted – dotted fern
  Festuca fuegiana var. vivipara Hook. – not accepted
  Festuca nervosa Hook. – not accepted
  Festuca occidentalis Hook. – accepted – western fescue
  Festuca occidentalis var. occidentalis Hook. – not accepted
  Festuca ovina ssp. rubra Hook. – not accepted
  Festuca richardsonii Hook. – not accepted – Richardson's fescue
  Fragaria chiloensis var. scouleri Hook. – not accepted
  Galium aparine var. minor Hook. – not accepted
  Garrya fadyenia Hook. – not accepted – Fadyen's silktassel
  Garrya fadyenii Hook. – accepted
  Gayophytum ramosissimum var. strictipes Hook. – not accepted
  Geranium cuneatum Hook. – accepted – hinahina
  Geranium cuneatum ssp. cuneatum Hook. – accepted – hinahina
  Geranium cuneatum var. cuneatum Hook. – not accepted – hinahina
  Gesneria bulbosa var. lateritia Hook. – not accepted
  Gesneria cochlearis Hook. – not accepted
  Gesneria elliptica Hook. – not accepted
  Gesneria elliptica var. lutea Hook. – not accepted
  Gesneria gardneri Hook. – not accepted
  Gesneria lindleyi Hook. – not accepted
  Gesneria pardina Hook. – not accepted
  Gesneria picta Hook. – not accepted
  Gesneria picta var. minus-hirsuta Hook. – not accepted
  Gesneria seemannii Hook. – not accepted
  Gesneria triflora Hook. – not accepted
  Gesneria verticillata Hook. – not accepted
  Gilia congesta Hook. – not accepted
  Gilia gracilis Hook. – not accepted
  Gleichenia owhyensis Hook. – not accepted
  Gleichenia owhyhensis Hook. – not accepted
  Gloxinia pallidiflora Hook. – not accepted
  Gloxinia speciosa var. albiflora Hook. – not accepted
  Gloxinia speciosa var. macrophylla Hook. – not accepted
  Gloxinia speciosa var. menziesii Hook. – not accepted
  Gloxinia tubiflora Hook. – not accepted
  Glyceria arctica Hook. – not accepted
  Gossypianthus Hook. – accepted – cottonflower
  Gossypianthus rigidiflorus Hook. – not accepted
  Gossypianthus tenuiflorus Hook. – not accepted
  Grimmia longirostris Hook. – accepted
  Grimmia spiralis Hook. – not accepted
  Grimmia unicolor Hook. – accepted – onecolor dry rock moss
  Grindelia grandiflora Hook. – accepted – manyray gumweed
  Gymnostomum involutum Hook. – not accepted
  Gymnostomum latifolium Hook. – not accepted
  Gymnostomum phascoides Hook. – not accepted
  Habenaria alata Hook. – accepted – Habenaria alada, winged bog orchid
  Hedwigia hornschuchiana Hook. – not accepted
  Hedwigia secunda Hook. – not accepted
  Helianthus quinquenervis Hook. – not accepted
  Hemitelia hostmanii Hook. – not accepted
  Hemitelia wilsonii Hook. – not accepted
  Hieracium albiflorum Hook. – accepted – white hawkweed, whiteflower hawkweed
  Hieracium gracile Hook. – not accepted – slender hawkweed
  Hieracium gracile var. gracile Hook. – not accepted – slender hawkweed
  Hieracium scouleri Hook. – accepted – Scouler's woollyweed, houndstongue hawkweed, woolyweed
  Hieracium scouleri var. scouleri Hook. – not accepted – Scouler's woollyweed
  Hookeria leskeoides Hook. – not accepted
  Hookeria radiculosa Hook. – not accepted
  Horkelia gordonii Hook. – not accepted
  Hymenopappus filifolius Hook. – accepted – fineleaf hymenopappus, cutleaf, fine-leaf woollywhite
  Hymenopappus filifolius var. filifolius Hook. – accepted – fineleaf hymenopappus
  Hymenophyllum protrusum Hook. – accepted
  Hymenoxys linearifolia Hook. – not accepted
  Hypericum ellipticum Hook. – accepted – pale St. Johnswort
  Hypericum scouleri Hook. – accepted – Scouler's St. Johnswort
  Hypericum scouleri ssp. scouleri Hook. – not accepted – Scouler's St. Johnswort
  Hypnum affine Hook. – not accepted
  Hypnum circinale Hook. – not accepted
  Hypnum crispifolium Hook. – not accepted
  Hypnum neckeroides Hook. – not accepted
  Hypnum robustum Hook. – not accepted
  Hypnum serpens var. compactum Hook. – not accepted
  Hypnum stoloniferum Hook. – not accepted
  Hypocyrta glabra Hook. – not accepted
  Hypocyrta gracilis Hook. – not accepted
  Hypocyrta leucostoma Hook. – not accepted
  Hypolepis nigrescens Hook. – accepted – black beadfern
  Ipomoea horsfalliae Hook. – accepted – Lady Doorly's morningglory, Lady Doorly's morning-glory
  Iresine grandiflora Hook. – not accepted
  Iresine herbstii Hook. – accepted – Herbst's bloodleaf
  Isonandra gutta Hook. – not accepted
  Iva axillaris var. robustior Hook. – not accepted
  Jatropha podagrica Hook. – accepted – goutystalk nettlespurge
  Juncus effusus var. gracilis Hook. – not accepted – lamp rush
  Juncus ensifolius var. major Hook. – not accepted
  Jungermannia albescens Hook. – not accepted
  Jungermannia blasia Hook. – not accepted
  Jungermannia clavigera Hook. – not accepted
  Jungermannia cordifolia Hook. – not accepted
  Jungermannia epiphylla var. furcigera Hook. – not accepted
  Jungermannia epiphylla var. longifolia Hook. – not accepted
  Jungermannia furcata var. elongata Hook. – not accepted
  Jungermannia hibernica Hook. – not accepted
  Jungermannia lyellii Hook. – not accepted
  Jungermannia orcadensis Hook. – not accepted
  Jungermannia pinguis var. angustior Hook. – not accepted
  Jungermannia pinnatifolia Hook. – not accepted
  Jungermannia sphaerocarpa Hook. – not accepted
  Jungermannia woodsii Hook. – not accepted
  Juniperus occidentalis Hook. – accepted – western juniper
  Juniperus occidentalis var. occidentalis Hook. – accepted – western juniper
  Klugia notoniana Hook. – not accepted
  Lathyrus ochroleucus Hook. – accepted – cream pea, cream peavine, pale vetchling peavine
  Lepanthes sanguinea Hook. – accepted – Jamaican babyboot orchid
  Lepidium latipes Hook. – accepted – San Diego pepperweed
  Lepidium latipes var. latipes Hook. – not accepted – San Diego pepperweed
  Lepidium smithii Hook. – not accepted
  Leuchtenbergia Hook. – accepted
  Leuchtenbergia principis Hook. – accepted
  Liatris punctata Hook. – accepted – dotted blazing star, dotted gayfeather
  Liatris punctata var. punctata Hook. – accepted – dotted blazing star, dotted gayfeather, densespike blazing star
  Lilium canadense var. parviflorum Hook. – not accepted
  Lindsaea walkerae Hook. – accepted
  Linum berlandieri Hook. – accepted – Berlandier's yellow flax
  Linum berlandieri var. berlandieri Hook. – accepted – Berlandier's yellow flax
  Loeflingia texana Hook. – not accepted
  Lophopyxis Hook. – accepted
  Lotus pinnatus Hook. – not accepted – meadow bird's-foot trefoil
  Luculia pinceana Hook. – accepted
  Lunania Hook. – accepted
  Lupinus nootkatensis var. glaber Hook. – not accepted
  Lupinus subcarnosus Hook. – accepted – Texas bluebonnet
  Lupinus texensis Hook. – accepted – Texas lupine, Texas bluebonnet
  Lysimachia radicans Hook. – accepted – trailing yellow loosestrife
  Madia glomerata Hook. – accepted – mountain tarweed, mountain tarplant, cluster tarweed
  Manihot grahamii Hook. – accepted – Graham's manihot
  Marsdenia maculata Hook. – not accepted
  Melocactus depressus Hook. – not accepted
  Menziesia glanduliflora Hook. – not accepted
  Merostachys capitata Hook. – not accepted
  Merostachys capitata var. capitata Hook. – not accepted
  Mimulus scouleri Hook. – not accepted
  Mitella pentandra Hook. – accepted – fivestamen miterwort
  Monoclea Hook. – accepted
  Monoclea crispata Hook. – not accepted
  Monoclea forsteri Hook. – accepted
  Myosotidium Hook. – accepted – giant forget-me-not
  Neckera abietina Hook. – not accepted
  Neckera douglasii Hook. – accepted – Douglas' neckera moss
  Niphaea albo-lineata Hook. – not accepted
  Notholaena sinuata var. integerrima Hook. – not accepted
  Nymphaea elegans Hook. – accepted – tropical royalblue waterlily
  Oenothera bistorta var. veitchiana Hook. – not accepted
  Oenothera drummondii Hook. – accepted – beach evening-primrose, beach eveningprimrose, beach evening primrose
  Oenothera drummondii ssp. drummondii Hook. – accepted – beach evening primrose
  Oenothera fruticosa var. vera Hook. – not accepted
  Ophioglossum petiolatum Hook. – accepted – stalked adder's-tongue, longstem adder's-tongue, longstem adderstongue
  Oplotheca gracilis Hook. – not accepted
  Orthotrichum rugifolium Hook. – not accepted
  Oxalis trilliifolia Hook. – accepted – threeleaf woodsorrel
  Oxytropis campestris var. glabrata Hook. – not accepted
  Oxytropis campestris var. melanocephala Hook. – not accepted
  Oxytropis campestris var. spicata Hook. – accepted – field locoweed
  Oxytropis foliolosa Hook. – not accepted
  Oxytropis splendens var. richardsonii Hook. – not accepted
  Oxytropis splendens var. vestita Hook. – not accepted
  Oxytropis uralensis var. subsucculenta Hook. – not accepted
  Pellaea bridgesii Hook. – accepted – Bridges' cliffbrake
  Pellaea longimucronata Hook. – not accepted
  Pellaea wrightiana Hook. – accepted – Wright's cliffbrake
  Penstemon baccharifolius Hook. – accepted – baccharisleaf beardtongue
  Penstemon cyananthus Hook. – accepted – Wasatch beardtongue
  Penstemon cyananthus var. cyananthus Hook. – accepted – Wasatch beardtongue
  Penstemon gairdneri Hook. – accepted – Gairdner's beardtongue
  Penstemon gairdneri var. gairdneri Hook. – accepted – Gairdner's beardtongue
  Penstemon menziesii Hook. – not accepted
  Penstemon murrayanus Hook. – accepted – scarlet beardtongue
  Penstemon tolmiei Hook. – not accepted
  Penstemon wrightii Hook. – accepted – Wright's beardtongue
  Phaca frigida var. americana Hook. – not accepted
  Phacelia congesta Hook. – accepted – blue curls, spike phacelia, caterpillars
  Phlox douglasii Hook. – not accepted
  Phlox douglasii var. douglasii Hook. – not accepted
  Phlox drummondii Hook. – accepted – Drummond's phlox, annual phlox
  Phlox drummondii ssp. drummondii Hook. – accepted – Drummond's phlox, annual phlox
  Phlox richardsonii Hook. – accepted – Richardson's phlox
  Phlox richardsonii ssp. richardsonii Hook. – accepted – Richardson's phlox
  Phyllospadix Hook. – accepted – surfgrass
  Phyllospadix scouleri Hook. – accepted – Scouler's surfgrass
  Physalis grandiflora Hook. – not accepted
  Picradenia richardsonii Hook. – not accepted
  Pimelea physodes Hook. – accepted
  Pinus lasiocarpa Hook. – not accepted
  Platanthera dilatata var. angustifolia Hook. – not accepted
  Pleuropogon sabinei var. elatior Hook. – not accepted
  Pleuropogon sabinei var. humilior Hook. – not accepted
  Pleurothallis aristata Hook. – accepted – forest bonnet orchid
  Poa arctica var. vivipara Hook. – not accepted
  Poa pratensis var. stricta Hook. – not accepted
  Pohlia flexuosa Hook. – accepted
  Polemonium pulcherrimum Hook. – accepted – skunkleaf polemonium, pretty Jacob's-ladder
  Polemonium pulcherrimum ssp. pulcherrimum Hook. – accepted – pretty Jacob's-ladder
  Polemonium pulcherrimum var. pulcherrimum Hook. – not accepted
  Polypodium chrysolepis Hook. – not accepted
  Polypodium vulgare var. occidentale Hook. – not accepted
  Polystachya Hook. – accepted – yellowspike orchid
  Portulaca grandiflora Hook. – accepted – mossrose, rose moss
  Pteris cretica var. albolineata Hook. – accepted – Cretan brake
  Pyrola bracteata Hook. – not accepted
  Pyrrocoma Hook. – accepted – goldenweed
  Pyrrocoma carthamoides Hook. – accepted – largeflower goldenweed
  Pyrrocoma carthamoides var. carthamoides Hook. – accepted – largeflower goldenweed
  Ranunculus cardiophyllus Hook. – accepted – heart-leaf buttercup, heartleaf buttercup
  Ranunculus cymbalaria var. alpinus Hook. – not accepted
  Ranunculus glaberrimus Hook. – accepted – sagebrush buttercup
  Ranunculus glaberrimus var. glaberrimus Hook. – accepted – sagebrush buttercup
  Ranunculus orthorhynchus Hook. – accepted – straightbeak buttercup
  Ranunculus orthorhynchus var. orthorhynchus Hook. – accepted – straightbeak buttercup
  Rhododendron albiflorum Hook. – accepted – white rhododendron, Cascade azalea
  Rhododendron albiflorum var. albiflorum Hook. – not accepted – Cascade azalea
  Rhododendron californicum Hook. – not accepted
  Rhynchoglossum zeylanicum Hook. – not accepted
  Rhytidophyllum auriculatum Hook. – accepted – tibey-amarillo
  Ruellia ciliatiflora Hook. – accepted – hairyflower wild petunia
  Rytidophyllum auriculatum Hook. – not accepted – tibey amarillo
  Sabatia macrophylla Hook. – accepted – largeleaf rose gentian
  Sabatia macrophylla var. macrophylla Hook. – accepted – largeleaf rose gentian
  Salix adenophylla Hook. – not accepted
  Salix barrattiana Hook. – accepted – Barratt's willow
  Salix cordata var. balsamifera Hook. – not accepted
  Salix cordata var. mackenzieana Hook. – not accepted
  Salix nivalis Hook. – accepted – snow willow
  Salix richardsonii Hook. – accepted – Richardson's willow
  Salix vestita var. nana Hook. – not accepted
  Salix villosa var. acutifolia Hook. – not accepted
  Sanguisorba canadensis var. latifolia Hook. – not accepted
  Saxifraga integrifolia Hook. – not accepted – wholeleaf saxifrage
  Saxifraga reflexa Hook. – not accepted – reflexed saxifrage
  Saxifraga reflexa var. reflexa Hook. – not accepted
  Saxifraga richardsonii Hook. – not accepted
  Schiedea menziesii Hook. – accepted – Menzies' schiedea
  Schiedea nuttallii Hook. – accepted – valley schiedea
  Scorzonella nutans Hook. – not accepted
  Scouleria Hook. – accepted – splashzone moss
  Scouleria aquatica Hook. – accepted – blackmat splashzone moss
  Sedum douglasii Hook. – not accepted
  Sedum spathulifolium Hook. – accepted – broadleaf stonecrop
  Sedum spathulifolium ssp. spathulifolium Hook. – not accepted – broadleaf stonecrop
  Sedum spathulifolium var. spathulifolium Hook. – accepted – broadleaf stonecrop
  Senecio ampullaceus Hook. – accepted – Texas ragwort
  Senecio canus Hook. – not accepted – woolly groundsel
  Senecio serra Hook. – accepted – tall ragwort, butterweed groundsel, butterweed
  Senecio serra var. serra Hook. – accepted – tall ragwort, tall groundsel
  Senecio triangularis Hook. – accepted – arrowleaf ragwort, arrowleaf groundsel
  Silene douglasii Hook. – accepted – seabluff catchfly, Douglas' campion, Douglas' catchfly
  Silene douglasii var. douglasii Hook. – accepted – Douglas' catchfly, seabluff catchfly, Douglas' campion
  Silene drummondii Hook. – accepted – Drummond's cockle, Drummond's catchfly, Drummond's campion
  Silene drummondii ssp. drummondii Hook. – accepted – Drummond's campion
  Silene drummondii var. drummondii Hook. – not accepted – Drummond's catchfly, Drummond's campion
  Silene menziesii Hook. – accepted – white catchfly, Menzies' campion
  Silene menziesii ssp. menziesii Hook. – not accepted – Menzies' catchfly, Menzies' campion
  Silene menziesii ssp. menziesii var. menziesii Hook. – not accepted
  Silene menziesii var. menziesii Hook. – not accepted – Menzies' campion
  Silene scouleri Hook. – accepted – Scouler's catchfly, Scouler's campion, simple campion
  Silene scouleri ssp. scouleri Hook. – accepted – simple campion
  Silene scouleri ssp. scouleri var. scouleri Hook. – not accepted – simple campion
  Silene scouleri var. scouleri Hook. – not accepted – simple campion
  Silphium asperimum Hook. – not accepted
  Silphium asperrimum Hook. – not accepted
  Sisymbrium curvisiliqua Hook. – not accepted
  Sisyrinchium chilense Hook. – not accepted – swordleaf blue-eyed grass
  Smilax lasioneura Hook. – accepted – Blue Ridge carrion-flower, Blue Ridge carrionflower
  Smilax lasioneuron Hook. – not accepted
  Solanum amblophyllum Hook. – accepted
  Solanum tweedianum Hook. – accepted
  Solidago boothii Hook. – not accepted
  Solidago boottii Hook. – not accepted
  Spiraea douglasii Hook. – accepted – rose spirea
  Spiraea douglasii var. douglasii Hook. – accepted – rose spirea
  Spiraea menziesii Hook. – not accepted
  Streptanthus glandulosus Hook. – accepted – bristly jewelflower
  Streptanthus glandulosus ssp. glandulosus Hook. – accepted – bristly jewelflower
  Streptanthus hyacinthoides Hook. – accepted – smooth twistflower, smooth jewelflower
  Streptanthus obtusifolius Hook. – not accepted
  Streptocarpus gardenii Hook. – accepted
  Streptocarpus polyanthus Hook. – accepted
  Streptocarpus polyanthus ssp. polyanthus Hook. – accepted
  Streptocarpus saundersii Hook. – accepted
  Symphoricarpos occidentalis Hook. – accepted – wolfberry, western snowberry
  Synthyris reniformis var. major Hook. – not accepted
  Tayloria Hook. – accepted – tayloria dung moss
  Telfairia Hook. – accepted
  Thysanocarpus Hook. – accepted – lacepod, fringepod
  Thysanocarpus curvipes Hook. – accepted – lacepod mustard, sand lacepod, sand fringepod
  Thysanocarpus curvipes ssp. curvipes Hook. – accepted
  Thysanocarpus pusillus Hook. – not accepted
  Tiarella laciniata Hook. – not accepted
  Tiarella unifoliata Hook. – not accepted
  Tillandsia aloifolia Hook. – not accepted
  Tillandsia bulbosa Hook. – accepted – Tillandsia base bulbosa, bulbous airplant
  Tillandsia pulchella Hook. – not accepted
  Tortula bryoides Hook. – not accepted
  Tortula indica Hook. – not accepted
  Tortula suberecta Hook. – not accepted
  Townsendia Hook. – not accepted
  Townsendia Hook. – accepted – Townsend daisy, townsendia
  Townsendia sericea Hook. – not accepted
  Trichantha major Hook. – not accepted
  Trichantha minor Hook. – not accepted
  Trientalis latifolia Hook. – accepted – broadleaf starflower, western starflower
  Trifolium longipes var. latifolium Hook. – not accepted
  Trifolium obtusiflorum Hook. – accepted – clammy clover
  Triticum repens var. dasystachyum Hook. – not accepted
  Triticum repens var. subvillosum Hook. – not accepted
  Tropidocarpum Hook. – accepted
  Tropidocarpum gracile Hook. – accepted – dobie pod
  Troximon aurantiacum Hook. – not accepted
  Turritis mollis Hook. – not accepted
  Uvularia smithii Hook. – not accepted
  Vanda tricolor Hook. – not accepted
  Verbena incisa Hook. – not accepted
  Vesicaria gracilis Hook. – not accepted
  Viburnum ellipticum Hook. – accepted – common viburnum
  Vicia americana var. minor Hook. – not accepted – mat vetch
  Vicia gigantea Hook. – not accepted
  Vilfa tenacissima var. fuscicolor Hook. – not accepted
  Viola nuttallii var. major Hook. – not accepted
  Voyria tenella Hook. – accepted – Puerto Rico ghostplant
  Weissia macrocarpa Hook. – not accepted
  Wyethia scabra Hook. – not accepted – badlands mule-ears, badlands mulesears, badlands wyethia
  Wyethia scabra var. scabra Hook. – not accepted – badlands mule-ears, badlands mulesears
   

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