Integrated Taxonomic Information System - Taxon Author Search Results

Expert: John L. Strother

ITIS records citing expert
 
 Kingdom Plantae
  Acanthoxanthium spinosum (L.) Fourr. -- not accepted
  Acmella Rich. ex Pers. -- accepted -- spotflower
  Acmella decumbens (Sm.) R.K. Jansen -- accepted -- creeping spotflower
  Acmella iodiscaea (A.H. Moore) R.K. Jansen -- accepted -- maluco
  Acmella oppositifolia (Lam.) R.K. Jansen -- accepted -- oppositeleaf spotflower
  Acmella oppositifolia var. repens (Walter) R.K. Jansen -- not accepted -- oppositeleaf spotflower, creeping spotflower
  Acmella pilosa R.K. Jansen -- accepted -- hairy spotflower
  Acmella pusilla (Hook. & Arn.) R.K. Jansen -- accepted -- dwarf spotflower
  Acmella repens (Walter) Rich. -- accepted -- oppositeleaf spotflower
  Acmella uliginosa (Sw.) Cass. -- accepted
  Adenophyllum Pers. -- accepted -- dogweed
  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 porophyllum (Cav.) Hemsl. -- accepted -- poreleaf dogweed
  Adenophyllum wrightii A. Gray -- accepted -- Wright's dogweed
  Agassizia suavis A. Gray & Engelm. -- not accepted
  Ambrosia L. -- accepted -- ragweed, bursage
  Ambrosia acanthicarpa Hook. -- accepted -- flatspine bur ragweed, flatspine burr ragweed, bursage, bursage ragweed, flat-spine burr-ragweed, annual bursage, sand bursage
  Ambrosia ambrosioides (Cav.) Payne -- accepted -- ambrosia leaf bur ragweed, ambrosia leaf burr ragweed, big bursage, ambrosia bursage
  Ambrosia aptera DC. -- not accepted
  Ambrosia artemisiifolia L. -- accepted -- annual ragweed, common ragweed, ragweed, low ragweed, Roman wormwood, short ragweed, small ragweed
  Ambrosia artemisiifolia var. artemisiifolia L. -- not accepted -- annual ragweed, ragweed, common ragweed
  Ambrosia artemisiifolia var. elatior (L.) Descourtils -- not accepted -- annual ragweed, common ragweed, ragweed
  Ambrosia artemisiifolia var. paniculata (Michx.) Blank. -- not accepted -- annual ragweed, common ragweed, ragweed
  Ambrosia bidentata Michx. -- accepted -- lanceleaf ragweed
  Ambrosia californica Rydb. -- not accepted
  Ambrosia canescens A. Gray -- accepted -- hairy ragweed
  Ambrosia chamissonis (Less.) Greene -- accepted -- silver bur ragweed, silver burr ragweed, beach-bur
  Ambrosia chamissonis var. bipinnatisecta (Less.) J.T. Howell -- not accepted
  Ambrosia cheiranthifolia A. Gray -- accepted -- Rio Grande ragweed, South Texas ambrosia
  Ambrosia chenopodiifolia (Benth.) Payne -- accepted -- San Diego bur ragweed, San Diego burr ragweed, San Diego bursage
  Ambrosia confertiflora DC. -- accepted -- weakleaf bur ragweed, weakleaf burr ragweed, ragweed
  Ambrosia cordifolia (A. Gray) Payne -- accepted -- Tucson bur ragweed, Tucson burr ragweed, heartleaf bursage
  Ambrosia coronopifolia Torr. & A. Gray -- not accepted
  Ambrosia cumanensis auct. non Kunth -- not accepted
  Ambrosia deltoidea (Torr.) Payne -- accepted -- triangle bur ragweed, triangle burr ragweed, triangle bursage
  Ambrosia dumosa (A. Gray) Payne -- accepted -- burrobush, white bursage
  Ambrosia elatior L. -- not accepted
  Ambrosia eriocentra (A. Gray) Payne -- accepted -- woolly fruit bur ragweed, woolly fruit burr ragweed, woolly bursage, hollyleaf bursage, wooly bursage
  Ambrosia glandulosa Scheele -- not accepted
  Ambrosia grayi (A. Nelson) Shinners -- accepted -- woollyleaf bur ragweed, woollyleaf burr ragweed, bur ragweed, lagoonweed, woollyleaf bursage, woollyleaf franseria, woollyleaf povertyweed
  Ambrosia hispida Pursh -- accepted -- coastal ragweed
  Ambrosia ilicifolia (A. Gray) Payne -- accepted -- hollyleaf bur ragweed, hollyleaf burr ragweed, hollyleaf bursage
  Ambrosia linearis (Rydb.) Payne -- accepted -- streaked bur ragweed, streaked burr ragweed
  Ambrosia maritima L. -- not accepted
  Ambrosia monogyra (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- singlewhorl burrobrush
  Ambrosia monophylla (Walter) Rydb. -- not accepted
  Ambrosia paniculata Michx. -- not accepted
  Ambrosia paniculata var. peruviana (Willd.) O.E. Schulz -- not accepted
  Ambrosia peruviana Willd. -- accepted -- Peruvian ragweed
  Ambrosia psilostachya DC. -- accepted -- Cuman ragweed, western ragweed, perennial ragweed
  Ambrosia psilostachya var. californica (Rydb.) S.F. Blake -- not accepted
  Ambrosia psilostachya var. coronopifolia (Torr. & A. Gray) Farw. -- not accepted
  Ambrosia psilostachya var. lindheimeriana (Scheele) Blank. -- not accepted
  Ambrosia pumila (Nutt.) A. Gray -- accepted -- dwarf bur ragweed, San Diego ambrosia, dwarf burr ragweed, San Diego ragweed
  Ambrosia rugelii Rydb. -- not accepted
  Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- burrobrush
  Ambrosia salsola var. fasciculata (A. Nelson) Strother & B.G. Baldw. -- not accepted
  Ambrosia salsola var. pentalepis (Rydb.) Strother & B.G. Baldw. -- not accepted
  Ambrosia salsola var. salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- not accepted
  Ambrosia tenuifolia Spreng. -- accepted -- slimleaf bur ragweed, slimleaf burr ragweed, field ragweed
  Ambrosia tomentosa Nutt. -- accepted -- skeletonleaf bur ragweed, skeletonleaf burr ragweed, skeleton-leaf burr-ragweed, skeletonleaf bursage
  Ambrosia trifida L. -- accepted -- great ragweed, Texan great ragweed, giant ragweed, tall ragweed, blood ragweed, perennial ragweed, horseweed
  Ambrosia trifida var. aptera (DC.) Kuntze -- not accepted
  Ambrosia trifida var. integrifolia (Muhl. ex Willd.) Torr. & A. Gray -- not accepted
  Ambrosia trifida var. texana Scheele -- not accepted -- Texan great ragweed, giant ragweed, great ragweed
  Ambrosia trifida var. trifida L. -- not accepted -- great ragweed, giant ragweed
  Ambrosia X helenae Rouleau -- accepted -- Helen ragweed
  Ambrosia X intergradiens W.H. Wagner -- accepted -- intergrading ragweed
  Ambrosia X platysperma (Seaman) Strother & B.G. Baldw. -- accepted
  Aster exscapus Richardson -- not accepted
  Bahia Lag. -- accepted -- bahia
  Bahia absinthifolia Benth. -- accepted -- hairyseed bahia
  Bahia absinthifolia var. absinthifolia Benth. -- not accepted -- hairyseed bahia, hairy-seed false goldfields
  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 -- slimlobe bahia, slim-lobe false goldfields
  Bahia pedata A. Gray -- accepted -- bluntscale bahia, blunt-scale false goldfields
  Bahia schaffneri S. Watson -- accepted -- Schaffner's bahia
  Bidens L. -- accepted -- beggarticks, Spanish needles, beggartick, devil's sticktight
  Bidens acuta (Wiegand) Britton -- not accepted
  Bidens alba (L) DC -- not accepted
  Bidens alba var. radiata (Sch. Bip.) Ballard ex T.E. Melchert -- not accepted -- romerillo, bidens
  Bidens amplectens Sherff -- accepted -- kokolau, ko`oko`olau
  Bidens amplissima Greene -- accepted -- Vancouver Island beggarticks
  Bidens aristosa (Michx.) Britton -- accepted -- bearded beggarticks, long-bracted beggar-ticks, tickseed sunflower
  Bidens aristosa var. fritcheyi Fernald -- not accepted
  Bidens aristosa var. mutica (A. Gray) Gattinger -- not accepted
  Bidens aristosa var. retrorsa (Sherff) Wunderlin -- not accepted
  Bidens asplenioides Sherff -- not accepted
  Bidens asymmetrica (Levl.) Sherff -- accepted -- Koolau Range beggarticks
  Bidens asymmetrica var. subocculata O. Deg. & Sherff -- not accepted
  Bidens aurea (Aiton) Sherff -- accepted -- Arizona beggarticks, Apache beggarticks
  Bidens aurea var. wrightii (A. Gray) Sherff -- not accepted
  Bidens awaluana O. Deg., I. Deg. & Sherff -- not accepted
  Bidens beckii Torr. ex Spreng. -- accepted -- Beck's water-marigold, Henderson's water-marigold, Oregon water-marigold
  Bidens bidentoides (Nutt.) Britton -- accepted -- Delmarva beggarticks
  Bidens bidentoides var. mariana (S.F. Blake) Sherff -- not accepted
  Bidens bigelovii A. Gray -- accepted -- Bigelow's beggarticks, Bigelow beggarticks, stickseed
  Bidens bigelovii var. angustiloba (DC.) Ballard ex T.E. Melchert -- not accepted
  Bidens bigelovii var. bigelovii A. Gray -- not accepted
  Bidens bipinnata L. -- accepted -- Spanish needles, spanish-needles
  Bidens bipinnata var. biternatoides Sherff -- not accepted
  Bidens bipinnata var. cynapiifolia (Kunth) G. Maza -- not accepted
  Bidens campylotheca Sch. Bip. -- accepted -- viper beggarticks
  Bidens campylotheca ssp. campylotheca Sch. Bip. -- accepted -- viper beggarticks
  Bidens campylotheca ssp. pentamera (Sherff) Ganders & Nagata -- accepted -- viper beggarticks, ko`oko`olau
  Bidens campylotheca ssp. waihoiensis H. St. John -- accepted -- Waihoi beggarticks, ko`oko`olau
  Bidens campylotheca var. pentamera Sherff -- not accepted
  Bidens cernua L. -- accepted -- nodding beggartick, nodding bur-marigold, nodding burr-marigold, bur marigold, nodding beggarticks, nodding bur marigold, sticktight, nodding burmarigold
  Bidens cernua var. cernua L. -- not accepted
  Bidens cernua var. dentata (Nutt.) B. Boivin -- not accepted
  Bidens cernua var. elata Torr. & A. Gray -- not accepted
  Bidens cernua var. elliptica Wiegand -- not accepted
  Bidens cernua var. integra Wiegand -- not accepted
  Bidens cernua var. minima (Huds.) Pursh -- not accepted
  Bidens cernua var. oligodonta Fernald & H. St. John -- not accepted
  Bidens cernua var. radiata DC. -- not accepted
  Bidens cervicata Sherff -- accepted -- Kauai beggarticks
  Bidens coartata Sherff -- not accepted
  Bidens comosa (A. Gray) Wiegand -- not accepted
  Bidens conjuncta Sherff -- accepted -- bog beggarticks, ko`oko`olau
  Bidens connata Muhl. ex Willd. -- accepted -- purplestem beggarticks, purple-stem beggarticks
  Bidens connata var. ambiversa Fassett -- not accepted
  Bidens connata var. anomala Farw. -- not accepted
  Bidens connata var. fallax (Warnst.) Sherff -- not accepted
  Bidens connata var. gracilipes Fernald -- not accepted
  Bidens connata var. inundata Fernald -- not accepted
  Bidens connata var. petiolata (Nutt.) Farw. -- not accepted
  Bidens connata var. pinnata S. Watson -- not accepted
  Bidens connata var. submutica Fassett -- not accepted
  Bidens coronata (L.) Britton -- not accepted -- crowned beggarticks
  Bidens coronata var. brachyodonta Fernald -- not accepted
  Bidens coronata var. tenuiloba (A. Gray) Sherff -- not accepted
  Bidens coronata var. trichosperma (Michx.) Fernald -- not accepted
  Bidens cosmoides (A. Gray) Sherff -- accepted -- cosmosflower beggarticks
  Bidens cosmoides var. refracta Hochr. -- not accepted
  Bidens ctenophylla Sherff -- not accepted
  Bidens cuneata Sherff -- not accepted -- cuneate bidens, wedge beggarticks
  Bidens cynapiifolia Kunth -- accepted -- West Indian beggarticks
  Bidens cynapiifolia var. portoricensis (Spreng.) O.E. Schulz -- not accepted
  Bidens cynapiifolia var. tenuis O.E. Schulz -- not accepted
  Bidens degeneri Sherff -- not accepted
  Bidens degeneri var. apioides Sherff -- not accepted
  Bidens discoidea (Torr. & A. Gray) Britton -- accepted -- small beggarticks, swamp beggar-ticks, discoid beggarticks
  Bidens distans Sherff -- not accepted
  Bidens eatonii Fernald -- accepted -- Eaton's beggarticks, Eaton's beggar-ticks, bident d'Eaton
  Bidens eatonii var. fallax Fernald -- not accepted
  Bidens eatonii var. illicita S.F. Blake -- not accepted
  Bidens eatonii var. interstes Fassett -- not accepted
  Bidens eatonii var. kennebecensis Fernald -- not accepted
  Bidens eatonii var. major Fassett -- not accepted
  Bidens eatonii var. mutabilis Fassett -- not accepted
  Bidens eatonii var. simulans Fassett -- not accepted
  Bidens elata (Torr. & A. Gray) Sherff -- not accepted
  Bidens elegans Greene -- not accepted
  Bidens fecunda O. Deg. & Sherff -- not accepted
  Bidens ferax O. Deg. & Sherff -- not accepted
  Bidens ferulifolia (Jacq.) DC. -- not accepted -- Apache beggarticks
  Bidens forbesii Sherff -- accepted -- coastal bluff beggarticks, coastalbluff beggarticks
  Bidens forbesii ssp. forbesii Sherff -- accepted -- coastal bluff beggarticks, coastalbluff beggarticks
  Bidens forbesii ssp. kahiliensis Ganders & Nagata -- accepted -- Kahili beggarticks
  Bidens frondosa L. -- accepted -- devil's beggartick, devil's-pitchfork, sticktight, bur marigold, devil's beggarticks, devil's bootjack, pitchfork weed, sticktights, tickseed sunflower
  Bidens frondosa var. anomala Porter ex Fernald -- not accepted
  Bidens frondosa var. caudata Sherff -- not accepted
  Bidens frondosa var. pallida Wiegand -- not accepted
  Bidens frondosa var. puberula Wiegand -- not accepted
  Bidens frondosa var. stenodonta Fernald & H. St. John -- not accepted
  Bidens fulvescens Sherff -- not accepted
  Bidens gardneri Baker -- accepted -- ridge beggartick
  Bidens glaucescens Greene -- not accepted
  Bidens gracilis Nutt. -- not accepted
  Bidens graciloides Sherff -- not accepted
  Bidens halawana O. Deg. & Sherff -- not accepted
  Bidens hawaiensis A. Gray -- accepted -- Hawai'i beggarticks
  Bidens heterodoxa (Fernald) Fernald & H. St. John -- accepted -- Connecticut beggarticks, Connecticut beggar-ticks, bident différent
  Bidens heterodoxa var. agnostica Fernald -- not accepted -- Connecticut beggarticks
  Bidens heterodoxa var. atheistica Fernald -- not accepted -- Connecticut beggarticks
  Bidens heterodoxa var. heterodoxa (Fernald) Fernald & St. John -- not accepted -- Connecticut beggarticks
  Bidens heterodoxa var. monardifolia Fernald -- not accepted -- Connecticut beggarticks
  Bidens heterodoxa var. orthodoxa Fernald & H. St. John -- not accepted -- Connecticut beggarticks
  Bidens heterophylla Ortega -- not accepted
  Bidens heterosperma A. Gray -- accepted -- Rocky Mountain beggarticks
  Bidens hillebrandiana (Drake) O. Deg. -- accepted -- seacliff beggarticks
  Bidens hillebrandiana ssp. hillebrandiana (Drake) O. Deg. -- accepted -- seacliff beggarticks
  Bidens hillebrandiana ssp. polycephala Nagata & Ganders -- accepted -- seacliff beggarticks
  Bidens hyperborea Greene -- accepted -- estuary beggarticks
  Bidens hyperborea var. arcuans Fern. -- not accepted -- estuary beggarticks
  Bidens hyperborea var. cathancensis Fernald -- not accepted
  Bidens hyperborea var. colpophila (Fernald & H. St. John) Fernald -- not accepted
  Bidens hyperborea var. gaspensis Fern. -- not accepted -- estuary beggarticks
  Bidens hyperborea var. hyperborea Greene -- not accepted -- estuary beggarticks
  Bidens hyperborea var. laurentiana Fassett -- not accepted
  Bidens hyperborea var. svensonii Fassett -- not accepted -- Svenson's beggarticks
  Bidens infirma Fernald -- not accepted
  Bidens involucrata (Nutt.) Britton -- not accepted
  Bidens laevis (L.) Britton, Sterns & Poggenb. -- accepted -- smooth beggarticks, bur marigold
  Bidens lemmonii A. Gray -- accepted -- Lemmon's beggarticks
  Bidens leptocephala Sherff -- accepted -- fewflower beggarticks, few-flower beggarticks
  Bidens macrocarpa (A. Gray) Sherff -- accepted -- largefruit beggarticks
  Bidens macrocarpa var. ovatifolia (A. Gray) Sherff -- not accepted
  Bidens mariana S.F. Blake -- not accepted
  Bidens mauiensis (A. Gray) Sherff -- accepted -- Maui beggarticks
  Bidens mauiensis var. ciliata H. St. John -- not accepted
  Bidens mauiensis var. cuneatoides Sherff -- not accepted
  Bidens mauiensis var. forbesiana Sherff -- not accepted
  Bidens mauiensis var. lanaiensis Sherff -- not accepted
  Bidens mauiensis var. media Sherff -- not accepted
  Bidens menziesii (A. Gray) Sherff -- accepted -- Mauna Loa beggarticks
  Bidens menziesii ssp. filiformis (Sherff) Ganders & Nagata -- accepted -- Mauna Loa beggarticks
  Bidens menziesii ssp. menziesii (A. Gray) Sherff -- accepted -- Mauna Loa beggarticks
  Bidens menziesii var. filiformis Sherff -- not accepted
  Bidens menziesii var. lepida O. Deg. & Sherff -- not accepted
  Bidens menziesii var. leptondontia Sherff -- not accepted
  Bidens micrantha Gaudich. -- accepted -- grassland beggarticks
  Bidens micrantha ssp. ctenophylla (Sherff) Nagata & Ganders -- accepted -- grassland beggarticks, ko`oko`olau
  Bidens micrantha ssp. kalealaha Nagata & Ganders -- accepted -- Kalealaha beggarticks, ko`oko`olau
  Bidens micrantha ssp. micrantha Gaudich. -- accepted -- grassland beggarticks
  Bidens micrantha var. caduca (Sherff) Sherff -- not accepted
  Bidens micrantha var. kaalana Sherff -- not accepted
  Bidens micrantha var. laciniata (Hillebr.) Sherff -- not accepted
  Bidens micrantha var. rudimentifera Sherff -- not accepted
  Bidens mitis (Michx.) Sherff -- accepted -- smallfruit beggarticks
  Bidens mitis var. leptophylla (Nutt.) Small -- not accepted
  Bidens molokaiensis (Hillebr.) Sherff -- accepted -- Molokai beggarticks, wedge beggarticks
  Bidens napaliensis Sherff -- not accepted
  Bidens nashii Small -- not accepted
  Bidens nematocera (Sherff) Sherff -- not accepted
  Bidens obtusiloba Sherff -- not accepted
  Bidens odorata Cav. -- not accepted
  Bidens pentamera (Sherff) O. Deg. & Sherff -- not accepted
  Bidens perversa O. Deg. & Sherff -- not accepted
  Bidens perversa var. aquilonalis O. Deg. & Sherff -- not accepted
  Bidens pilosa L. -- accepted -- hairy beggarticks, common beggarticks, romerillo, spanish-needles, beggar's ticks, cobbler's pegs, fisi`uli, kofe tonga, matakaro, Spanish needles
  Bidens pilosa var. bimucronata (Turcz.) Sch. Bip. -- not accepted
  Bidens pilosa var. minor (Blume) Sherff -- not accepted
  Bidens pilosa var. pilosa L. -- not accepted
  Bidens pilosa var. radiata Sch. Bip. -- not accepted
  Bidens polylepis S.F. Blake -- accepted
  Bidens polylepis var. retrorsa Sherff -- not accepted
  Bidens populifolia Sherff -- accepted -- Oahu beggarticks
  Bidens puberula (Wiegand) Rydb. -- not accepted
  Bidens pulchella (Less.) Sch. Bip. -- not accepted
  Bidens reptans (L.) G. Don -- accepted -- manzanilla trepador
  Bidens reptans var. reptans (L.) G. Don -- accepted -- manzanilla trepador
  Bidens reptans var. urbanii (Greenm.) O.E. Schulz -- not accepted -- Urban's beggartick
  Bidens salicoides Sherff -- not accepted
  Bidens sandvicensis Less. -- accepted -- shrubland beggarticks
  Bidens sandvicensis ssp. confusa Nagata & Ganders -- accepted -- shrubland beggarticks
  Bidens sandvicensis ssp. sandvicensis Less. -- accepted -- shrubland beggarticks
  Bidens sandvicensis var. antrorsa O. Deg. & Sherff -- not accepted
  Bidens sandvicensis var. caduca Sherff -- not accepted
  Bidens sandvicensis var. imminuta O. Deg. & Sherff -- not accepted
  Bidens sandvicensis var. leiocarpa O. Deg. & Sherff -- not accepted
  Bidens sandvicensis var. setosa (Sherff) Sherff -- not accepted
  Bidens skottsbergii Sherff -- not accepted
  Bidens skottsbergii var. conglutinata (O. Deg. & Sherff) Sherff -- not accepted
  Bidens skottsbergii var. pololuensis O. Deg. & Sherff -- not accepted
  Bidens squarrosa Kunth -- accepted
  Bidens stokesii Sherff -- not accepted
  Bidens tenuisecta A. Gray -- accepted -- slimlobe beggarticks, slim-lobe beggarticks
  Bidens torta Sherff -- accepted -- corkscrew beggarticks
  Bidens trichosperma (Michx.) Britton -- accepted -- crowned beggarticks
  Bidens tripartita L. -- accepted -- threelobe beggarticks, three-lobe beggarticks
  Bidens tripartita var. heterodoxa Fernald -- not accepted
  Bidens urbanii Greenm. -- accepted -- Urban's beggartick
  Bidens valida Sherff -- accepted -- Mt. Kahili beggarticks
  Bidens vulgata Greene -- accepted -- big devil's beggartick, tall beggarticks, western sticktight
  Bidens vulgata var. puberula (Wiegand) Greene -- not accepted
  Bidens vulgata var. schizantha Lunell -- not accepted
  Bidens waianensis Sherff -- not accepted
  Bidens waimeana Sherff -- not accepted
  Bidens wiebkei Sherff -- accepted -- Wiebke's beggarticks, ko`oko`olau
  Bidens X dimidiata O. Deg. & Sherff -- not accepted
  Bidens X magnidisca O. Deg. & Sherff -- not accepted
  Bidens X micranthoides Sherff -- not accepted
  Bidens X multiceps Fassett -- accepted -- beggartick
  Castalis Cass. -- accepted -- castalis
  Chlorocrepis albiflora (Hook.) W.A. Weber -- not accepted
  Chlorocrepis fendleri (Sch. Bip.) W.A. Weber -- not accepted
  Chlorocrepis tristis (Willd. ex Spreng.) A. Löve & D. Löve -- not accepted
  Chlorocrepis tristis ssp. gracilis (Hook.) W.A. Weber -- not accepted
  Conyza Less. -- accepted -- horseweed
  Conyza apurensis Kunth -- not accepted -- manzanilla horseweed
  Conyza bilboana Remy -- not accepted
  Conyza bonariensis (L.) Cronquist -- accepted -- asthmaweed, wavy-leaf fleabane, flax-leaf fleabane, flaxleaved fleabane, hairy fleabane
  Conyza bonariensis var. bonariensis (L.) Cronquist -- not accepted -- asthmaweed
  Conyza bonariensis var. leiotheca (S.F. Blake) Cuatrec. -- not accepted -- asthmaweed
  Conyza canadensis (L.) Cronquist -- accepted -- Canadian horseweed, horseweed, horseweed fleabane, mares tail, Canada horseweed, marestail
  Conyza canadensis var. canadensis (L.) Cronquist -- not accepted -- Canadian horseweed
  Conyza canadensis var. glabrata (A. Gray) Cronquist -- not accepted -- Canadian horseweed
  Conyza canadensis var. pusilla (Nutt.) Cronquist -- not accepted -- Canadian horseweed
  Conyza chilensis Spreng. -- not accepted
  Conyza floribunda Kunth -- accepted -- asthmaweed
  Conyza laevigata (L.C. Rich) Pruski -- accepted -- manzanilla horseweed
  Conyza parva Cronquist -- not accepted
  Conyza primulifolia (Lam.) Cuatrec. & Lourteig -- accepted -- primroseleaf horseweed
  Conyza ramosissima Cronquist -- accepted -- dwarf horseweed, branching conyza
  Conyza subspathulata Cronquist -- not accepted
  Coreopsis alba L. -- not accepted
  Coreopsis aurea Aiton -- not accepted
  Coreopsis ferulifolia Jacq. -- not accepted
  Coreopsis reptans L. -- not accepted
  Dimorphotheca ecklonis DC. -- not accepted
  Dyssodia cooperi A. Gray -- not accepted
  Dyssodia neomexicana (A. Gray) B.L. Rob. -- not accepted
  Dyssodia porophylla (Cav.) Cav. -- not accepted
  Dyssodia porophylloides A. Gray -- not accepted
  Erigeron apurensis (Kunth) Griseb. -- not accepted
  Erigeron bilboanus (Remy) Cabrera -- not accepted
  Erigeron bonariensis L. -- not accepted
  Erigeron canadensis L. -- not accepted
  Erigeron canadensis var. glabratus A. Gray -- not accepted
  Erigeron canadensis var. pusillus (Nutt.) B. Boivin, non H.E. Ahles -- not accepted
  Erigeron chinensis Jacq. -- not accepted
  Erigeron crispus Pourr. -- not accepted
  Erigeron divaricatus Michx. -- not accepted
  Erigeron floribundus (Kunth) Sch. Bip. -- not accepted
  Erigeron laevigatus L. C. Rich. -- not accepted
  Erigeron linifolius Willd. -- not accepted
  Erigeron pusillus Nutt. -- not accepted
  Erigeron spathulatus Vahl -- not accepted
  Eriophyllum staechadifolium Lag. -- accepted -- seaside woolly sunflower
  Eriophyllum staechadifolium var. artemisiifolium (Less.) J.F. Macbr. -- not accepted
  Eriophyllum staechadifolium var. depressum Greene -- not accepted
  Franseria acanthicarpa (Hook.) Coville -- not accepted
  Franseria ambrosioides Cav. -- not accepted
  Franseria chamissonis Less. -- not accepted
  Franseria chamissonis ssp. bipinnatisecta (Less.) Wiggins & Stockw. -- not accepted
  Franseria chamissonis var. bipinnatisecta Less. -- not accepted
  Franseria chenopodiifolia Benth. -- not accepted
  Franseria confertiflora (DC.) Rydb. -- not accepted
  Franseria cordifolia A. Gray -- not accepted
  Franseria deltoidea Torr. -- not accepted
  Franseria discolor Nutt. -- not accepted -- skeletonleaf bursage
  Franseria dumosa A. Gray -- not accepted
  Franseria eriocentra A. Gray -- not accepted
  Franseria ilicifolia A. Gray -- not accepted
  Franseria linearis Rydb. -- not accepted
  Franseria pumila Nutt. -- not accepted
  Franseria strigulosa Rydb. -- not accepted
  Franseria tomentosa (Nutt.) A. Nelson, non A. Gray -- not accepted -- bur ragweed
  Franseria tomentosa A. Gray -- not accepted
  Gaertnera tomentosa (A. Gray) Kuntze -- not accepted
  Gaertneria acanthicarpa (Hook.) Britton -- not accepted
  Gaertneria discolor (Nutt.) Kuntze -- not accepted
  Gaertneria grayi A. Nelson -- not accepted
  Gaertneria tenuifolia Harv. & A. Gray -- not accepted
  Gaertneria tomentosa (Nutt.) A. Heller -- not accepted
  Gaillardia Foug. -- accepted -- blanketflower, gaillardia
  Gaillardia aestivalis (Walter) H. Rock -- accepted -- lanceleaf blanketflower, Winkler's blanketflower, lanceleaf gaillardia
  Gaillardia aestivalis var. aestivalis (Walter) H. Rock -- not accepted -- lanceleaf blanketflower, prairie gaillardia
  Gaillardia aestivalis var. flavovirens (C. Mohr) Cronquist -- not accepted -- lanceleaf blanketflower
  Gaillardia aestivalis var. winkleri (Cory) B.L. Turner -- not accepted -- Winkler's blanketflower
  Gaillardia amblyodon J. Gay -- accepted -- maroon blanketflower
  Gaillardia aristata Pursh -- accepted -- common gaillardia, gaillardia, great blanket-flower
  Gaillardia arizonica A. Gray -- accepted -- Arizona blanketflower, Pringle's blanketflower
  Gaillardia arizonica var. arizonica A. Gray -- not accepted -- Arizona blanketflower
  Gaillardia arizonica var. pringlei (Rydb.) S.F. Blake -- not accepted -- Pringle's blanketflower
  Gaillardia chrysantha Small -- not accepted
  Gaillardia coahuilensis B.L. Turner -- accepted -- bandanna daisy
  Gaillardia drummondii (Hook.) DC. -- not accepted
  Gaillardia fastigiata Greene -- not accepted
  Gaillardia flava Rydb. -- accepted -- yellow blanketflower
  Gaillardia gracilis A. Nelson -- not accepted
  Gaillardia lanceolata Michx. -- not accepted
  Gaillardia lanceolata var. fastigiata (Greene) Waterf. -- not accepted
  Gaillardia lanceolata var. flavovirens C. Mohr -- not accepted
  Gaillardia lutea Greene -- not accepted
  Gaillardia lutea var. winkleri Cory -- not accepted
  Gaillardia mearnsii Rydb. -- not accepted
  Gaillardia mexicana auct. non A. Gray -- not accepted
  Gaillardia multiceps Greene -- accepted -- onion blanketflower
  Gaillardia multiceps var. microcephala B.L. Turner -- not accepted -- onion blanketflower
  Gaillardia multiceps var. multiceps Greene -- not accepted -- onion blanketflower
  Gaillardia neomexicana A. Nelson -- not accepted
  Gaillardia parryi Greene -- accepted -- Parry's blanketflower
  Gaillardia picta D. Don -- not accepted
  Gaillardia pinnatifida Torr. -- accepted -- red dome blanketflower, yellow blanketflower, red-dome blanketflower, blanketflower, slender gaillardia
  Gaillardia pinnatifida var. linearis (Rydb.) Biddulph -- not accepted -- red dome blanketflower, reddome blanketflower
  Gaillardia pinnatifida var. pinnatifida Torr. -- not accepted -- red dome blanketflower
  Gaillardia pringlei Rydb. -- not accepted
  Gaillardia pulchella Foug. -- accepted -- firewheel, Indianblanket, rosering gaillardia, Indian blanket
  Gaillardia pulchella var. australis Turner & M.A. Whalen -- not accepted -- firewheel
  Gaillardia pulchella var. picta (D. Don) A. Gray -- not accepted -- firewheel
  Gaillardia pulchella var. pulchella Foug. -- not accepted -- firewheel
  Gaillardia rigida Small ex Rydb. -- not accepted
  Gaillardia serotina (Walter) H. Rock -- not accepted
  Gaillardia spathulata A. Gray -- accepted -- western blanketflower
  Gaillardia suavis (A. Gray & Engelm.) Britton & Rusby -- accepted -- perfumeballs, sweet gaillardia
  Gaillardia trinervata Small -- not accepted
  Gaillardia villosa Rydb. -- not accepted
  Gaillardia X grandiflora Van Houtte -- accepted
  Grindelia Willd. -- accepted -- gumweed
  Grindelia acutifolia Steyerm. -- not accepted -- sharpleaf gumweed
  Grindelia adenodonta (Steyerm.) G.L. Nesom -- accepted -- Lonestar gumweed
  Grindelia aphanactis Rydb. -- not accepted
  Grindelia arenicola Steyerm. -- not accepted
  Grindelia arizonica A. Gray -- accepted -- Arizona gumweed, New Mexican gumweed, cutleaf gumweed
  Grindelia arizonica var. arizonica A. Gray -- not accepted -- Arizona gumweed
  Grindelia arizonica var. dentata Steyerm. -- not accepted
  Grindelia arizonica var. microphylla Steyerm. -- not accepted
  Grindelia arizonica var. neomexicana (Woot. & Standl.) G.L. Nesom -- not accepted -- New Mexican gumweed
  Grindelia arizonica var. stenophylla Steyerm. -- not accepted -- Arizona gumweed
  Grindelia camporum Greene -- not accepted -- Great Valley gumweed
  Grindelia camporum var. bracteosa (J.T. Howell) M.A. Lane -- not accepted -- bract gumweed
  Grindelia camporum var. camporum Greene -- not accepted -- Great Valley gumweed
  Grindelia camporum var. parviflora Steyerm. -- not accepted
  Grindelia ciliata (Nutt.) Spreng. -- accepted -- Spanish gold
  Grindelia columbiana (Piper) Rydb. -- not accepted -- Columbia River gumweed
  Grindelia decumbens Greene -- accepted -- reclined gumweed
  Grindelia decumbens var. decumbens Greene -- not accepted -- reclined gumweed
  Grindelia decumbens var. subincisa (Greene) Steyerm. -- not accepted -- reclined gumweed
  Grindelia fastigiata Greene -- not accepted -- pointed gumweed
  Grindelia fraxinipratensis Reveal & Beatley -- accepted -- Ash Meadows gumplant
  Grindelia fraxino-pratensis Reveal & Beatley -- not accepted -- Ash Meadows gumplant
  Grindelia fraxinopratensis Reveal & Beatley -- not accepted -- Ash Meadows gumweed, Ash Meadows gumplant
  Grindelia grandiflora Hook. -- accepted -- manyray gumweed
  Grindelia hallii Steyerm. ex Rothr. -- not accepted
  Grindelia havardii Steyerm. -- accepted -- Havard's gumweed
  Grindelia hirsutula Hook. & Arn. -- accepted -- hairy gumweed, sharpleaf gumweed, bract gumweed
  Grindelia hirsutula ssp. hirsutula Hook. & Arn. -- not accepted -- hairy gumweed
  Grindelia hirsutula ssp. rubricaulis (DC.) D.D. Keck -- not accepted
  Grindelia hirsutula var. davyi (Jeps.) M.A. Lane -- not accepted -- hairy gumweed
  Grindelia hirsutula var. hallii (Steyerm. ex Rothr.) M.A. Lane -- not accepted -- Hall's gumweed
  Grindelia hirsutula var. hirsutula Hook. & Arn. -- not accepted -- hairy gumweed
  Grindelia hirsutula var. maritima (Greene) M.A. Lane -- not accepted -- coastal gumweed
  Grindelia howellii Steyerm. -- accepted -- Howell's gumweed
  Grindelia humilis Hook. & Arn. -- not accepted
  Grindelia inornata Greene -- not accepted -- Colorado gumweed
  Grindelia inornata var. angusta Steyerm. -- not accepted -- Colorado gumweed
  Grindelia inornata var. inornata Greene -- not accepted -- Colorado gumweed
  Grindelia integrifolia DC. -- accepted -- Puget Sound gumweed
  Grindelia integrifolia var. integrifolia DC. -- not accepted -- Puget Sound gumweed
  Grindelia integrifolia var. macrophylla (Greene) Cronquist -- not accepted
  Grindelia laciniata Rydb. -- not accepted -- cutleaf gumweed, cut-leaf gumweed
  Grindelia lanceolata Nutt. -- accepted -- narrowleaf gumweed, Texan gumweed, spiny toothed gumweed, Gulf gumweed
  Grindelia lanceolata var. lanceolata Nutt. -- not accepted -- narrowleaf gumweed
  Grindelia lanceolata var. texana (Scheele) Shinners -- not accepted -- Texan gumweed
  Grindelia latifolia Kellogg -- not accepted -- coastal gumweed
  Grindelia latifolia ssp. platyphylla (Greene) D.D. Keck -- not accepted
  Grindelia latifolia var. latifolia Kellogg -- not accepted -- coastal gumweed
  Grindelia latifolia var. platyphylla Greene -- not accepted
  Grindelia littoralis Steyerm. -- not accepted
  Grindelia maritima (Greene) Steyerm. -- not accepted
  Grindelia microcephala DC. -- accepted -- littlehead gumweed
  Grindelia microcephala var. adenodonta Steyerm. -- not accepted
  Grindelia microcephala var. microcephala DC. -- not accepted -- littlehead gumweed
  Grindelia microcephala var. pusilla Steyerm. -- not accepted
  Grindelia nana Nutt. -- not accepted -- Idaho gumweed
  Grindelia nana ssp. columbiana Piper -- not accepted
  Grindelia nana var. discoidea (Nutt.) A. Gray -- not accepted
  Grindelia nana var. integerrima (Rydb.) Steyerm. -- not accepted -- Idaho gumweed
  Grindelia nana var. integrifolia Nutt. -- not accepted
  Grindelia nana var. nana Nutt. -- not accepted -- Idaho gumweed
  Grindelia neomexicana Woot. & Standl. -- not accepted
  Grindelia nuda Alph. Wood -- not accepted -- curlytop gumweed, curly-top gumweed
  Grindelia nuda var. aphanactis (Rydb.) G.L. Nesom -- not accepted -- curlytop gumweed, rayless gumweed
  Grindelia nuda var. nuda Alph. Wood -- not accepted -- curlytop gumweed
  Grindelia oolepis S.F. Blake -- accepted -- plains gumweed
  Grindelia oxylepis Greene -- accepted -- Mexican gumweed
  Grindelia paludosa Greene -- not accepted
  Grindelia papposa G.L. Nesom & Suh -- not accepted -- wax goldenweed, Spanish gold, spanishgold
  Grindelia perennis A. Nelson -- not accepted
  Grindelia procera Greene -- not accepted
  Grindelia pusilla (Steyerm.) G.L. Nesom -- accepted -- little gumweed
  Grindelia revoluta Steyerm. -- not accepted -- rolled gumweed
  Grindelia robusta Nutt. -- not accepted
  Grindelia robusta var. angustifolia A. Gray -- not accepted
  Grindelia robusta var. bracteosa (J.T. Howell) D.D. Keck -- not accepted
  Grindelia robusta var. robusta Nutt. -- not accepted -- shore gumweed
  Grindelia scabra Greene -- accepted -- rough gumweed
  Grindelia scabra var. neomexicana (Woot. & Standl.) Steyerm. -- not accepted
  Grindelia serrulata Rydb. -- not accepted
  Grindelia squarrosa (Pursh) Dunal -- accepted -- curlycup gumweed, curlytop gumweed, gumweed, rosinweed, tarweed
  Grindelia squarrosa var. integrifolia (Nutt.) B. Boivin -- not accepted
  Grindelia squarrosa var. nuda (Alph. Wood) A. Gray -- not accepted
  Grindelia squarrosa var. quasiperennis Lunell -- not accepted -- curlytop gumweed, rosinweed, tarweed, gumweed, curlycup gumweed, curly-cup gumweed
  Grindelia squarrosa var. serrulata (Rydb.) Steyerm. -- not accepted -- gumweed, curlytop gumweed, rosinweed, tarweed, curlycup gumweed, curly-cup gumweed
  Grindelia squarrosa var. squarrosa (Pursh) Dunal -- not accepted -- curlycup gumweed, curly-cup gumweed, curlytop gumweed, rosinweed, tarweed, gumweed
  Grindelia stricta DC. -- not accepted -- Oregon gumweed
  Grindelia stricta ssp. blakei (Steyerm.) D.D. Keck -- not accepted
  Grindelia stricta ssp. venulosa (Jeps.) D.D. Keck -- not accepted
  Grindelia stricta var. angustifolia (A. Gray) M.A. Lane -- not accepted -- Oregon gumweed
  Grindelia stricta var. platyphylla (Greene) M.A. Lane -- not accepted -- Oregon gumweed
  Grindelia stricta var. stricta DC. -- not accepted -- Oregon gumweed
  Grindelia subalpina Greene -- accepted -- subalpine gumweed
  Grindelia subalpina var. erecta (A. Nelson) Steyerm. -- not accepted -- subalpine gumweed
  Grindelia subalpina var. subalpina Greene -- not accepted -- subalpine gumweed
  Grindelia texana Scheele -- not accepted
  Grindelia texana var. lanceolata (Nutt.) Shinners -- not accepted
  Haplopappus ciliatus (Nutt.) DC. -- not accepted -- Spanish gold, waxed goldenweed
  Helianthus laevis L. -- not accepted
  Hieracium L. -- accepted -- hawkweed
  Hieracium abscissum Less. -- accepted -- Rusby's hawkweed
  Hieracium acranthophorum Om. -- not accepted -- Tunugdliarfik hawkweed
  Hieracium acranthophorum var. acranthophorum Om. -- not accepted -- Tunugdliarfik hawkweed
  Hieracium acranthophorum var. isortoquense Böcher -- not accepted -- Tunugdliarfik hawkweed
  Hieracium acuminatum Jord. -- not accepted
  Hieracium albertinum Farr -- not accepted
  Hieracium albiflorum Hook. -- accepted -- white hawkweed, whiteflower hawkweed
  Hieracium alpinum L. -- accepted -- alpine hawkweed
  Hieracium amitsokense Dahlst. -- not accepted -- royal hawkweed
  Hieracium angmagssalikense Om. -- not accepted -- blackstyle hawkweed
  Hieracium argutum Nutt. -- accepted -- southern hawkweed
  Hieracium argutum var. argutum Nutt. -- not accepted -- southern hawkweed
  Hieracium argutum var. parishii (A. Gray) Jeps. -- not accepted
  Hieracium argyraeum Small -- not accepted
  Hieracium atratum Fr. -- accepted -- polar hawkweed
  Hieracium aurantiacum L. -- accepted -- orange hawkweed
  Hieracium auricula auct. non L. -- not accepted
  Hieracium bolanderi A. Gray -- accepted -- Bolander's hawkweed
  Hieracium brevipilum Greene -- accepted -- Mogollon hawkweed
  Hieracium caespitosum Dumort. -- accepted -- meadow hawkweed, yellow hawkweed
  Hieracium canadense Michx. -- accepted -- Canadian hawkweed, yellow hawkweed
  Hieracium canadense var. canadense Michx. -- not accepted -- Canadian hawkweed
  Hieracium canadense var. divaricatum Lepage -- not accepted -- Canadian hawkweed
  Hieracium canadense var. fasciculatum (Pursh) Fernald -- not accepted -- Canadian hawkweed
  Hieracium canadense var. hirtirameum Fernald -- not accepted
  Hieracium canadense var. kalmii (L.) Scoggan -- not accepted
  Hieracium canadense var. subintegrum Lepage -- not accepted -- Canadian hawkweed
  Hieracium carneum Greene -- accepted -- Huachuca hawkweed
  Hieracium chapacanum Zahn -- not accepted
  Hieracium columbianum Rydb. -- not accepted
  Hieracium columbianum auct. non Rydb. -- not accepted
  Hieracium crepidispermum Fr. -- accepted -- Lemmon's hawkweed
  Hieracium cusickii Gandog. -- not accepted
  Hieracium cynoglossoides Arv.-Touv. -- not accepted -- houndstongue hawkweed
  Hieracium cynoglossoides var. nudicaule A. Gray -- not accepted
  Hieracium devoldii Om. -- not accepted -- Devold's hawkweed
  Hieracium dovrense Lindeb. ex Nyman -- accepted
  Hieracium eugenii Om. -- not accepted -- neria hawkweed
  Hieracium fendleri Sch. Bip. -- accepted -- yellow hawkweed, yellow hawksbeard
  Hieracium fendleri var. discolor A. Gray -- not accepted -- yellow hawkweed
  Hieracium fendleri var. fendleri Sch. Bip. -- accepted -- yellow hawkweed, Fendler's hawkweed
  Hieracium fendleri var. mogollense A. Gray -- not accepted -- Mogollon hawkweed
  Hieracium flagellare Willd. -- accepted -- hawkweed
  Hieracium flagellare ssp. amauracron Missbach & Zahn -- not accepted
  Hieracium flagellare ssp. cernuiforme Naegeli & Peter -- not accepted
  Hieracium flagellare ssp. glatzense Naegeli & Peter -- not accepted
  Hieracium flettii H. St. John & Warren -- not accepted
  Hieracium florentinum All. -- not accepted
  Hieracium floribundum Wimm. & Grab. -- not accepted -- yellow devil hawkweed
  Hieracium glomeratum Froel. -- accepted -- queen-devil hawkweed
  Hieracium gracile Hook. -- not accepted -- slender hawkweed
  Hieracium gracile var. alaskanum Zahn -- not accepted -- Alaska hawkweed
  Hieracium gracile var. densifloccosum (Zahn) Cronquist -- not accepted
  Hieracium gracile var. detonsum (A. Gray) A. Gray -- not accepted -- low alpine hawkweed
  Hieracium gracile var. gracile Hook. -- not accepted -- slender hawkweed
  Hieracium gracile var. yukonense A.E. Porsild -- not accepted -- Yukon hawkweed
  Hieracium greenei A. Gray -- accepted -- Greene's hawkweed
  Hieracium greenii Porter & Britton -- not accepted -- Maryland hawkweed
  Hieracium groenlandicum Arv.-Touv. -- not accepted -- Greenland hawkweed
  Hieracium gronovii L. -- accepted -- queendevil, Gronovis hawkweed
  Hieracium gronovii var. foliosum Michx. -- not accepted
  Hieracium helleri Gandog. -- not accepted
  Hieracium horridum Fr. -- accepted -- prickly hawkweed, shaggy hawkweed
  Hieracium hyparcticum (Almquist) Elfstr. -- not accepted -- arctic hawkweed
  Hieracium inuloides Tausch -- accepted -- butterfly hawkweed
  Hieracium ivigtutense Om. -- not accepted -- Holsteinsborg hawkweed
  Hieracium kalmii L. -- not accepted -- Kalm's hawkweed
  Hieracium kalmii var. canadense (Michx.) Reveal -- not accepted
  Hieracium kalmii var. fasciculatum (Pursh) Lepage -- not accepted
  Hieracium kalmii var. kalmii L. -- not accepted -- Kalm's hawkweed
  Hieracium kalmii var. subintegrum (Lepage) Lepage -- not accepted
  Hieracium lachenalii C.C. Gmel. -- not accepted -- common hawkweed
  Hieracium lactucella Wallr. -- accepted -- European hawkweed, hawkweed
  Hieracium laevigatum Willd. -- not accepted -- smooth hawkweed
  Hieracium lemmonii A. Gray -- not accepted -- Lemmon's hawkweed
  Hieracium lividorubens (Almquist) Elfstr. -- not accepted -- cow hawkweed
  Hieracium lividorubens var. lividorubens (Almquist) Elfstr. -- not accepted -- cow hawkweed
  Hieracium lividorubens var. subnudulum Dahlst. -- not accepted -- cow hawkweed
  Hieracium longiberbe Howell -- accepted -- longbeard hawkweed
  Hieracium longipilum Torr. -- accepted -- hairy hawkweed, longbeard hawkweed
  Hieracium maculatum Sm. -- accepted -- spotted hawkweed
  Hieracium marianum Willd. -- accepted -- Maryland hawkweed
  Hieracium megacephalon Nash -- not accepted -- coastalplain hawkweed
  Hieracium megacephalum Nash -- accepted -- coastal plain hawkweed
  Hieracium murorum L. -- accepted -- wall hawkweed
  Hieracium musartutense Om. -- not accepted -- Musartut hawkweed
  Hieracium nepiocratum Om. -- not accepted -- Lindenows Fjord hawkweed
  Hieracium nudicaule (A. Gray) A. Heller -- accepted -- Scouler's woollyweed
  Hieracium paniculatum L. -- accepted -- Allegheny hawkweed
  Hieracium parryi Zahn -- accepted
  Hieracium pennsylvanicum Fr. -- not accepted
  Hieracium pilosella L. -- accepted -- mouseear hawkweed
  Hieracium pilosella var. niveum Müll. Arg. -- not accepted -- mouseear hawkweed
  Hieracium pilosella var. pilosella L. -- not accepted -- mouseear hawkweed
  Hieracium piloselloides Vill. -- accepted -- tall hawkweed, kingdevil
  Hieracium plicatum Lindb. -- accepted -- boreal hawkweed
  Hieracium praealtum Vill. ex Gochnat -- not accepted -- kingdevil
  Hieracium praealtum var. decipiens W.D.J. Koch -- not accepted -- kingdevil
  Hieracium praealtum var. praealtum Vill. ex Gochnat -- not accepted -- kingdevil
  Hieracium pratense Tausch -- not accepted -- yellow kingdevil, field hawkweed, meadow hawkweed, yellow hawkweed
  Hieracium prenanthoides Vill. -- accepted
  Hieracium pringlei A. Gray -- accepted -- Pringle's hawkweed
  Hieracium rigorosum (Laest.) Almquist -- not accepted -- rockyscree hawkweed
  Hieracium rigorosum var. nanusekense Om. -- not accepted -- rockyscree hawkweed
  Hieracium rigorosum var. rigorosum (Laest.) Almquist -- not accepted -- rockyscree hawkweed
  Hieracium rigorosum var. sermilikense Om. -- not accepted -- rockyscree hawkweed
  Hieracium rigorosum var. unanakense Om. -- not accepted -- rockyscree hawkweed
  Hieracium robinsonii (Zahn) Fernald -- accepted -- Robinson's hawkweed, épervičre de Robinson
  Hieracium rusbyi Greene -- not accepted -- Rusby's hawkweed
  Hieracium sabaudum L. -- accepted -- New England hawkweed
  Hieracium scabriusculum Schwein. -- not accepted
  Hieracium scabriusculum var. columbianum (Rydb.) Lepage -- not accepted
  Hieracium scabriusculum var. columbianum auct. non (Rydb.) Lepage -- not accepted
  Hieracium scabriusculum var. perhirsutum Lepage -- not accepted
  Hieracium scabriusculum var. saximontanum Lepage -- not accepted
  Hieracium scabriusculum var. scabrum (Schwein.) Lepage -- not accepted
  Hieracium scabrum Michx. -- accepted -- rough hawkweed
  Hieracium scabrum var. intonsum Fernald & H. St. John -- not accepted -- rough hawkweed
  Hieracium scabrum var. leucocaule Fernald & H. St. John -- not accepted -- rough hawkweed
  Hieracium scabrum var. scabrum Michx. -- not accepted -- rough hawkweed
  Hieracium scabrum var. tonsum Fernald & H. St. John -- not accepted -- rough hawkweed
  Hieracium scholanderi Om. -- not accepted -- Kap Farvel hawkweed
  Hieracium schultzii Fr. -- accepted -- roughstem hawkweed
  Hieracium scouleri Hook. -- accepted -- Scouler's woollyweed, houndstongue hawkweed, woolyweed
  Hieracium scouleri var. albertinum (Farr) G.W. Douglas & G.A. Allen -- not accepted
  Hieracium scouleri var. griseum (Rydb.) A. Nelson -- not accepted
  Hieracium scouleri var. nudicaule (A. Gray) Cronquist -- not accepted -- Scouler's woollyweed, woollyweed
  Hieracium scouleri var. scouleri Hook. -- not accepted -- Scouler's woollyweed
  Hieracium scribneri Small -- accepted -- Scribner's hawkweed
  Hieracium siskiyouense M. Peck -- not accepted
  Hieracium stelechodes Om. -- not accepted -- Dronning Maries Dal hawkweed
  Hieracium stiptocaule Om. -- not accepted -- Igaliko Fjord hawkweed
  Hieracium stoloniferum Viv. -- accepted
  Hieracium stoloniflorum Waldst. & Kit. -- accepted
  Hieracium strictum FRIES -- accepted
  Hieracium sylowii Om. -- not accepted -- brownstyle hawkweed
  Hieracium sylowii var. norwagorum Om. -- not accepted -- brownstyle hawkweed
  Hieracium sylowii var. sylowii Om. -- not accepted -- Sylow's hawkweed
  Hieracium traillii Greene -- accepted -- Maryland hawkweed
  Hieracium tridentatum Fr. -- accepted -- threetooth hawkweed
  Hieracium trigonophorum Ósk. -- accepted -- singlehead hawkweed
  Hieracium triste Willd. ex Spreng. -- accepted -- woolly hawkweed, slender hawkweed, low alpine hawkweed
  Hieracium triste ssp. gracile (Hook.) Calder & Roy L. Taylor -- not accepted
  Hieracium triste var. fulvum Hultén -- not accepted -- woolly hawkweed
  Hieracium triste var. gracile (Hook.) A. Gray -- not accepted
  Hieracium triste var. triste Willd. ex Spreng. -- not accepted -- woolly hawkweed
  Hieracium triste var. tritiforme Zahn -- not accepted
  Hieracium umbellatum L. -- accepted -- narrowleaf hawkweed, Canadian hawkweed, smooth hawkweed, Kalm's hawkweed, narrow-leaf hawkweed
  Hieracium umbellatum var. canadense (Michx.) Breitung -- not accepted
  Hieracium umbellatum var. scabriusculum Farw. -- not accepted
  Hieracium ungavense Lepage -- not accepted
  Hieracium vagum Jord. -- not accepted
  Hieracium venosum L. -- accepted -- rattlesnakeweed
  Hieracium venosum var. nudicaule (Michx.) Farw. -- not accepted -- rattlesnakeweed
  Hieracium venosum var. venosum L. -- not accepted -- rattlesnakeweed
  Hieracium vulgatum Fr. -- accepted -- common hawkweed
  Hieracium wrightii (A. Gray) B.L. Rob. & Greenm. -- not accepted -- roughstem hawkweed
  Hieracium X alleghaniense Britton (pro sp.) -- accepted -- Allegheny hawkweed
  Hieracium X atramentarium (Naegeli & Peter) Zahn ex Engl. (pro sp.) -- accepted -- hawkweed
  Hieracium X brachiatum Bethel. ex DC. -- accepted
  Hieracium X dorei Lepage -- not accepted
  Hieracium X duplex Peter -- not accepted
  Hieracium X dutillyanum Lepage -- not accepted -- hawkweed
  Hieracium X fassettii Lepage -- accepted -- Fassett's hawkweed
  Hieracium X fernaldii Lepage -- not accepted -- Fernald's hawkweed
  Hieracium X flagellare Willd. (pro sp.) -- not accepted -- hawkweed
  Hieracium X floribundum Wimm. & Grab. (pro sp.) -- accepted -- hawkweed
  Hieracium X fuscatrum Naegeli & Peter (pro sp.) -- accepted -- hawkweed
  Hieracium X grohii Lepage -- accepted -- Groh's hawkweed
  Hieracium X macrostolonum G. Schneid. -- not accepted
  Hieracium X marianum Willd. (pro sp.) -- not accepted -- hawkweed
  Hieracium X scribneri Small (pro sp.) -- not accepted -- Scribner's hawkweed
  Hieracium X stoloniflorum Waldst. & Kit. (pro sp.) -- not accepted -- hawkweed
  Hymenatherum neomexicanum A. Gray -- not accepted
  Hymenoclea fasciculata A. Nelson -- not accepted
  Hymenoclea monogyra Torr. & A. Gray -- not accepted -- singlewhorl burrobrush, cheeseweed burrobrush, singlewhorl burrobush
  Hymenoclea pentalepis Rydb. -- not accepted
  Hymenoclea salsola Torr. & A. Gray -- not accepted -- white burrobrush, burrobrush
  Hymenoclea salsola var. fasciculata (A. Nelson) K.M. Peterson & Payne -- not accepted -- burrobrush, white burrobush
  Hymenoclea salsola var. patula (A. Nelson) K.M. Peterson & Payne -- not accepted
  Hymenoclea salsola var. pentalepis (Rydb.) L.D. Benson -- not accepted -- burrobrush, white burrobrush
  Hymenoclea salsola var. salsola Torr. & A. Gray -- not accepted -- burrobrush, white burrobrush
  Iva L. -- accepted -- marsh elder, iva, marshelder, sumpweed
  Iva angustifolia Nutt. ex DC. -- accepted -- narrowleaf marsh elder, Texas marsh elder, narrowleaf marshelder, narrowleaf sumpweed
  Iva angustifolia var. latior Shinners -- not accepted
  Iva annua L. -- accepted -- annual marsh elder, annual marsh-elder, annual marshelder, seacoast sumpweed
  Iva annua var. annua L. -- not accepted -- annual marsh-elder, annual marshelder
  Iva annua var. caudata (Small) R.C. Jacks. -- not accepted -- annual marshelder
  Iva annua var. macrocarpa (S.F. Blake) R.C. Jacks. -- not accepted -- annual marshelder
  Iva asperifolia Less. -- accepted -- Pensacola marsh elder, Pensacola marshelder
  Iva axillaris Pursh -- accepted -- povertyweed, deer-root, poverty sumpweed, lesser marshelder, mouseear povertyweed, poverty weed, smallflowered marshelder
  Iva axillaris ssp. robustior (Hook.) Bassett -- not accepted
  Iva axillaris var. axillaris Pursh -- not accepted
  Iva axillaris var. robustior Hook. -- not accepted
  Iva caudata Small -- not accepted
  Iva cheiranthifolia Kunth -- accepted -- fly marsh elder, fly marshelder
  Iva ciliata Willd. -- not accepted
  Iva ciliata var. macrocarpa S.F. Blake -- not accepted
  Iva frutescens L. -- accepted -- Jesuit's bark, bigleaf sumpweed
  Iva frutescens ssp. frutescens L. -- not accepted -- Jesuit's bark
  Iva frutescens ssp. oraria (Bartlett) R.C. Jacks. -- not accepted -- Jesuit's bark
  Iva frutescens var. oraria (Bartlett) Fernald & Grisc. -- not accepted
  Iva hayesiana A. Gray -- accepted -- San Diego povertyweed
  Iva imbricata Walter -- accepted -- seacoast marsh elder, seacoast marshelder
  Iva microcephala Nutt. -- accepted -- piedmont marsh elder, piedmont marshelder
  Iva texensis R.C. Jacks. -- not accepted -- narrowleaf sumpweed, Texas marshelder
  Lactuca L. -- accepted -- lettuce
  Lactuca biennis (Moench) Fernald -- accepted -- tall blue lettuce, wild blue lettuce
  Lactuca campestris Greene -- not accepted
  Lactuca campestris var. typica Wiegand -- not accepted
  Lactuca canadensis L. -- accepted -- Canada lettuce, Florida blue lettuce, wild lettuce
  Lactuca canadensis var. canadensis L. -- not accepted -- Canada lettuce
  Lactuca canadensis var. integrifolia (Bigelow) Torr. & A. Gray -- not accepted
  Lactuca canadensis var. latifolia Kuntze -- not accepted -- Canada lettuce
  Lactuca canadensis var. longifolia (Michx.) Farw. -- not accepted -- Canada lettuce
  Lactuca canadensis var. obovata Wiegand -- not accepted -- Canada lettuce
  Lactuca canadensis var. typica Wiegand -- not accepted
  Lactuca floridana (L.) Gaertn. -- accepted -- woodland lettuce, Florida lettuce
  Lactuca floridana var. floridana (L.) Gaertn. -- not accepted -- woodland lettuce
  Lactuca floridana var. villosa (Jacq.) Cronquist -- not accepted -- woodland lettuce
  Lactuca graminifolia Michx. -- accepted -- grassleaf lettuce, grass-leaf lettuce
  Lactuca graminifolia var. arizonica McVaugh -- not accepted -- grassleaf lettuce
  Lactuca graminifolia var. graminifolia Michx. -- accepted -- grassleaf lettuce
  Lactuca hirsuta Muhl. ex Nutt. -- accepted -- hairy lettuce
  Lactuca hirsuta var. albiflora (Torr. & A. Gray) Shinners -- not accepted -- hairy lettuce
  Lactuca hirsuta var. hirsuta Muhl. ex Nutt. -- not accepted -- hairy lettuce
  Lactuca hirsuta var. sanguinea (Bigelow) Fernald -- not accepted -- hairy wild lettuce, hairy lettuce
  Lactuca indica L. -- accepted -- Indian lettuce
  Lactuca ludoviciana (Nutt.) Riddell -- accepted -- biannual lettuce, Louisiana lettuce, wild lettuce
  Lactuca oblongifolia Nutt. -- not accepted
  Lactuca pulchella (Pursh) DC. -- not accepted -- blue lettuce
  Lactuca sagittifolia Elliot -- not accepted
  Lactuca saligna L. -- accepted -- willowleaf lettuce, willow-leaf lettuce
  Lactuca saligna var. runcinata Gren. & Godr. -- not accepted
  Lactuca sativa L. -- accepted -- garden lettuce, lettuce
  Lactuca scariola L. -- not accepted
  Lactuca scariola var. integrata Gren. & Godr. -- not accepted
  Lactuca scariola var. integrifolia (Bogenh.) G. Beck -- not accepted
  Lactuca serriola L. -- accepted -- prickly lettuce, China lettuce, wild lettuce
  Lactuca spicata auct. non (Lam.) Hitchc. -- not accepted
  Lactuca spicata var. integrifolia (Torr. & A. Gray) Britton -- not accepted
  Lactuca steelei Britton -- not accepted
  Lactuca tatarica (L.) C.A. Mey. -- not accepted -- Russian blue lettuce, blue lettuce, chicory lettuce
  Lactuca tatarica ssp. pulchella (Pursh) Stebbins -- not accepted
  Lactuca tatarica var. heterophylla (Nutt.) B. Boivin -- not accepted
  Lactuca tatarica var. pulchella (Pursh) Breitung -- not accepted -- Russian blue lettuce, blue wild lettuce, chicory lettuce, blue lettuce
  Lactuca terrae-novae Fernald -- accepted -- Newfoundland lettuce
  Lactuca villosa Jacq. -- not accepted
  Lactuca virosa L. -- accepted -- bitter lettuce
  Lactuca X morssii B.L. Rob. (pro sp.) -- accepted -- Morss' lettuce
  Leptilon bonariense (L.) Small -- not accepted
  Leptilon canadense (L.) Britton -- not accepted
  Leptilon chinense (Jacq.) Britton -- not accepted
  Leptilon divaricatum (Michx.) Raf. -- not accepted
  Leptilon linifolium (Willd.) Small -- not accepted
  Leptilon pusillum (Nutt.) Britton -- not accepted
  Megalodonta Greene -- not accepted -- water-marigold, watermarigold
  Megalodonta beckii (Torr. ex Spreng.) Greene -- not accepted -- Beck's watermarigold
  Megalodonta beckii var. beckii (Torr. ex Spreng.) Greene -- not accepted -- Beck's watermarigold
  Megalodonta beckii var. hendersonii Sherff -- not accepted -- Henderson's watermarigold
  Megalodonta beckii var. oregonensis Sherff -- not accepted -- Oregon watermarigold
  Mulgedium Cass. -- accepted
  Mulgedium floridanum (L) DC -- not accepted
  Mulgedium oblongifolium (Nutt.) Reveal -- accepted -- blue lettuce
  Mulgedium pulchellum (Pursh) G. Don -- not accepted
  Mulgedium spicatum auct. non (Lam.) Small -- not accepted
  Mulgedium spicatum var. integrifolium (Torr. & A. Gray) Small -- not accepted
  Mulgedium villosum (Jacq.) Small -- not accepted
  Osteospermum L. -- accepted -- daisybush
  Osteospermum calendulaceum L. f. -- accepted -- stinking roger
  Osteospermum ecklonis (DC.) Norl. -- accepted -- blue and white daisybush
  Osteospermum fruticosum (L.) Norl. -- accepted -- shrubby daisybush
  Osteospermum muricatum E. Mey. ex DC. -- accepted
  Osteospermum sinuatum (DC.) Norl. -- accepted -- glandular cape marigold
  Osteospermum spinescens Thunb. -- accepted
  Prionopsis Nutt. -- not accepted -- prionopsis
  Prionopsis ciliata (Nutt.) Nutt. -- not accepted
  Pteronia porophylla Cav. -- not accepted
  Raillardella (A. Gray) Benth. -- accepted -- raillardella, silvermat
  Raillardella argentea (A. Gray) A. Gray -- accepted -- silky raillardella, silvermat
  Raillardella minima Rydb. -- not accepted
  Raillardella pringlei Greene -- accepted -- showy raillardella
  Raillardella scaposa (A. Gray) A. Gray -- accepted -- stem raillardella, greenleaf silvermat
  Raillardia argentea A. Gray -- not accepted
  Sonchus tataricus L. -- not accepted
  Spilanthes americana auct. non Hieron. -- not accepted
  Spilanthes americana var. repens (Walter) A.H. Moore -- not accepted
  Spilanthes americana var. stolonifera (DC.) A.H. Moore -- not accepted
  Spilanthes iodiscaea A.H. Moore -- not accepted
  Spilanthes pusilla Hook. & Arn. -- not accepted
  Spilanthes stolonifera DC. -- not accepted
  Spilanthes uliginosa Sw. -- not accepted
  Stemmodontia calycina (Rich.) O.E. Schulz -- not accepted
  Townsendia Hook. -- accepted -- Townsend daisy, townsendia
  Townsendia alpigena Piper -- not accepted -- Wyoming Townsend daisy
  Townsendia alpigena var. alpigena Piper -- not accepted -- Wyoming Townsend daisy
  Townsendia alpigena var. caelilinensis (S.L. Welsh) Kartesz & Gandhi -- not accepted -- Wyoming Townsend daisy
  Townsendia alpigena var. minima (Eastw.) Dorn -- not accepted -- Wyoming Townsend daisy
  Townsendia annua Beaman -- accepted -- annual Townsend daisy, annual Townsend-daisy
  Townsendia anomala Heiser -- not accepted
  Townsendia aprica S.L. Welsh & Reveal -- accepted -- last chance Townsend daisy, Last Chance townsendia
  Townsendia arizonica A. Gray -- not accepted
  Townsendia condensata Parry ex A. Gray -- accepted -- cushion Townsend daisy
  Townsendia condensata var. anomala (Heiser) Dorn -- not accepted -- cushion Townsend daisy
  Townsendia condensata var. condensata Parry ex A. Gray -- not accepted -- cushion Townsend daisy
  Townsendia excapa (Richardson) T. Porter -- not accepted
  Townsendia eximia A. Gray -- accepted -- tall Townsend daisy, tall townsendia
  Townsendia exscapa (Richardson) Porter -- accepted -- stemless Townsend daisy, stemless townsend-daisy, stemless townsendia
  Townsendia fendleri A. Gray -- accepted -- Fendler's Townsend daisy
  Townsendia florifer (Hook.) A. Gray -- accepted -- showy Townsend daisy
  Townsendia florifer var. watsonii (A. Gray) Cronquist -- not accepted
  Townsendia florifera (Hook.) A. Gray -- not accepted -- showy Townsend daisy, showy townsendia
  Townsendia florifera var. watsonii (A. Gray) Cronquist -- not accepted
  Townsendia formosa Greene -- accepted -- smooth Townsend daisy, smooth townsend-daisy
  Townsendia glabella A. Gray -- accepted -- Gray's Townsend daisy
  Townsendia grandiflora Nutt. -- accepted -- largeflower Townsend daisy
  Townsendia gypsophila T.K. Lowrey & P.J. Knight -- accepted -- gypsum-loving Townsend daisy
  Townsendia hookeri Beaman -- accepted -- Hooker's Townsend daisy, Hooker's townsendia, Hooker's townsend-daisy
  Townsendia incana Nutt. -- accepted -- hoary Townsend daisy, hoary townsend-daisy, hoary townsendia
  Townsendia intermedia Rydb. -- not accepted
  Townsendia jonesii (Beaman) Reveal -- accepted -- Jones' Townsend daisy, Jones' townsendia
  Townsendia jonesii var. jonesii (Beaman) Reveal -- accepted -- Jones' Townsend daisy, Jones' townsendia
  Townsendia jonesii var. lutea S.L. Welsh -- not accepted
  Townsendia jonesii var. tumulosa Reveal -- not accepted -- Jones' Townsend daisy, Charleston townsendia
  Townsendia leptotes (A. Gray) Osterh. -- accepted -- common Townsend daisy, common townsendia
  Townsendia mensana M.E. Jones -- accepted -- table Townsend daisy
  Townsendia mensana var. jonesii Beaman -- not accepted
  Townsendia microcephala Dorn -- accepted -- smallheaded Townsend daisy
  Townsendia minima Eastw. -- accepted -- Wyoming Townsend daisy
  Townsendia montana M.E. Jones -- accepted -- Wyoming Townsend daisy
  Townsendia montana var. caelilinensis S.L. Welsh -- not accepted
  Townsendia montana var. minima (Eastw.) Beaman -- not accepted
  Townsendia nuttallii Dorn -- not accepted -- Nuttall's Townsend daisy
  Townsendia parryi D.C. Eaton -- accepted -- Parry's Townsend daisy, Parry's townsendia
  Townsendia pinetorum Greene ex A. Nelson -- not accepted
  Townsendia rothrockii A. Gray ex Rothr. -- accepted -- Rothrock's Townsend daisy, Rothrock's townsendia
  Townsendia scapigera D.C. Eaton -- accepted -- tufted Townsend daisy, ground townsendia
  Townsendia sericea Hook. -- not accepted
  Townsendia sericea var. leptotes A. Gray -- not accepted
  Townsendia smithii L.M. Shultz & A.H. Holmgren -- accepted -- Black Rock Townsend daisy, Black Rock townsend-daisy
  Townsendia spathulata Nutt. -- accepted -- sword Townsend daisy
  Townsendia strigosa Nutt. -- accepted -- hairy Townsend daisy, hairy Townsend-daisy, hairy townsendia
  Townsendia texensis Larsen -- accepted -- Texas Townsend daisy, Texas townsendia
  Townsendia vreelandii Rydb. -- not accepted
  Vernonia Schreb. -- accepted -- ironweed
  Vernonia aborigina Gleason -- not accepted
  Vernonia acaulis (Walter) Gleason -- accepted -- stemless ironweed
  Vernonia altissima Nutt. -- not accepted
  Vernonia altissima var. lilacina Clute -- not accepted
  Vernonia altissima var. taeniotricha S.F. Blake -- not accepted
  Vernonia angustifolia Michx. -- accepted -- tall ironweed
  Vernonia angustifolia ssp. angustifolia Michx. -- not accepted -- tall ironweed
  Vernonia angustifolia ssp. mohrii (S.B. Jones) S.B. Jones & Faust -- not accepted -- Mohr's ironweed
  Vernonia angustifolia ssp. scaberrima (Nutt.) S.B. Jones & Faust -- not accepted -- tall ironweed
  Vernonia angustifolia var. mohrii S.B. Jones -- not accepted
  Vernonia angustifolia var. scaberrima (Nutt.) A. Gray -- not accepted
  Vernonia anthelmintica (L.) Willd. -- accepted -- ironweed
  Vernonia arkansana DC. -- accepted -- Arkansas ironweed
  Vernonia baldwinii Torr. -- accepted -- Baldwin's ironweed, interior ironweed, western ironweed, ironweed
  Vernonia baldwinii ssp. baldwinii Torr. -- not accepted -- Baldwin's ironweed
  Vernonia baldwinii ssp. interior (Small) Faust -- not accepted -- interior ironweed
  Vernonia blodgettii Small -- accepted -- Florida ironweed
  Vernonia crinita Raf. -- not accepted
  Vernonia fasciculata Michx. -- accepted -- prairie ironweed, western ironweed
  Vernonia fasciculata ssp. corymbosa (Schwein. ex Keating) S.B. Jones -- not accepted -- prairie ironweed, western ironweed
  Vernonia fasciculata ssp. fasciculata Michx. -- not accepted -- prairie ironweed
  Vernonia fasciculata var. corymbosa (Schwein. ex Keating) Daniels -- not accepted
  Vernonia flaccidifolia Small -- accepted -- Tennessee ironweed
  Vernonia galamensis (Cass.) Less. -- accepted -- ironweed
  Vernonia gigantea (Walter) Trel. -- accepted -- giant ironweed, tall ironweed
  Vernonia gigantea ssp. gigantea (Walter) Trel. -- not accepted -- giant ironweed
  Vernonia gigantea ssp. ovalifolia (Torr. & A. Gray) Urbatsch -- not accepted -- giant ironweed
  Vernonia glauca (L.) Willd. -- accepted -- broadleaf ironweed
  Vernonia harperi Gleason -- not accepted
  Vernonia interior Small -- not accepted
  Vernonia larseniae B.L. King & S.B. Jones -- accepted -- Larsen's ironweed
  Vernonia larsenii B.L. King & S.B. Jones -- not accepted -- Larsen's ironweed
  Vernonia lettermannii Engelm. ex A. Gray -- accepted -- narrowleaf ironweed, slimleaf ironweed
  Vernonia lindheimeri A. Gray & Engelm. -- accepted -- woolly ironweed
  Vernonia lindheimeri var. leucophylla Larsen -- not accepted
  Vernonia marginata (Torr.) Raf. -- accepted -- plains ironweed, ironplant
  Vernonia marginata var. tenuifolia (Small) Shinners -- not accepted
  Vernonia missurica Raf. -- accepted -- Missouri ironweed
  Vernonia noveboracensis (L.) Michx. -- accepted -- New York ironweed
  Vernonia noveboracensis var. tomentosa (Elliot) Britton -- not accepted
  Vernonia ovalifolia Torr. & A. Gray -- not accepted
  Vernonia pauciflora (Willd.) Less. -- not accepted
  Vernonia pulchella Small -- accepted -- Georgia ironweed
  Vernonia recurva Gleason -- not accepted
  Vernonia scaberrima Nutt. -- not accepted
  Vernonia texana (A. Gray) Small -- accepted -- Texas ironweed
  Vernonia X concinna Gleason (pro sp.) -- accepted -- ironweed
  Vernonia X dissimilis Gleason (pro sp.) -- accepted -- ironweed
  Vernonia X georgiana Bartlett (pro sp.) -- accepted -- ironweed
  Vernonia X guadalupensis A. Heller (pro sp.) -- accepted -- Guadalupe ironweed
  Vernonia X illinoensis Gleason -- accepted -- Illinois ironweed
  Vernonia X peralta Daniels -- accepted -- ironweed
  Vernonia X recurva Gleason (pro sp.) -- accepted
  Vernonia X vulturina Shinners (pro sp.) -- accepted -- ironweed
  Wedelia Jacq. -- accepted -- creepingoxeye, wedelia
  Wedelia acapulcensis Kunth -- accepted -- Acapulco wedelia
  Wedelia acapulcensis var. acapulcensis Kunth -- accepted
  Wedelia acapulcensis var. hispida auct. non (Kunth) Strother -- not accepted -- hairy wedelia
  Wedelia acapulcensis var. hispida (Kunth) Strother -- accepted -- hairy wedelia
  Wedelia biflora (L) DC -- accepted
  Wedelia buphthalmoides var. dominicensis Griseb. -- not accepted
  Wedelia calycina Rich. -- accepted -- coastalplain creepingoxeye
  Wedelia calycina var. dominicensis (Griseb.) Domin -- not accepted
  Wedelia calycina var. parviflora (Rich.) Alain -- not accepted
  Wedelia fruticosa Jacq. -- accepted -- coastal plain creepingoxeye, smallflower creepingoxeye, coastalplain creepingoxeye
  Wedelia hispida auct. non Kunth -- not accepted
  Wedelia jacquinii var. calycina (Rich.) O.E. Schulz -- not accepted
  Wedelia lanceolata DC. -- accepted -- riverbank creepingoxeye
  Wedelia parviflora Rich. -- not accepted -- smallflower creepingoxeye
  Wedelia reticulata DC. -- accepted -- manazanilla del monte
  Wedelia texana (A. Gray) B.L. Turner -- not accepted -- hairy wedelia
  Wollastonia biflora (L) DC -- not accepted
  Xanthium L. -- accepted -- cocklebur
  Xanthium acerosum Greene -- not accepted
  Xanthium ambrosioides Hook. & Arn. -- not accepted -- cocklebur
  Xanthium americanum Walter -- not accepted
  Xanthium californicum Greene -- not accepted
  Xanthium californicum var. rotundifolium Widder -- not accepted
  Xanthium calvum Millsp. & Sherff -- not accepted
  Xanthium campestre Greene -- not accepted
  Xanthium canadense Mill. -- not accepted
  Xanthium cavanillesii Schouw -- not accepted
  Xanthium cenchroides Millsp. & Sherff -- not accepted
  Xanthium chasei Fernald -- not accepted
  Xanthium chinense Mill. -- not accepted
  Xanthium commune Britton -- not accepted
  Xanthium curvescens Millsp. & Sherff -- not accepted
  Xanthium cylindraceum Millsp. & Sherff -- not accepted
  Xanthium echinatum Murray -- not accepted
  Xanthium echinellum Greene -- not accepted
  Xanthium glanduliferum Greene -- not accepted
  Xanthium globosum Shull -- not accepted
  Xanthium inflexum Mack. & Bush -- not accepted
  Xanthium italicum Moretti -- not accepted
  Xanthium macounii Britton -- not accepted
  Xanthium macrocarpum var. glabratum DC. -- not accepted
  Xanthium occidentale Bertol. -- not accepted
  Xanthium oligacanthum Piper -- not accepted
  Xanthium orientale L. -- not accepted
  Xanthium oviforme Wallr. -- not accepted
  Xanthium pensylvanicum Wallr. -- not accepted -- common cocklebur
  Xanthium saccharatum Wallr. -- not accepted
  Xanthium speciosum Kearney -- not accepted
  Xanthium spinosum L. -- accepted -- spiny cocklebur, Bathurst burr, cocklebur, spiny cockleburr
  Xanthium spinosum var. inerme Bel -- not accepted
  Xanthium strumarium L. -- accepted -- rough cocklebur, Canada cocklebur, cocklebur, common cocklebur, rough cockleburr, cockleburr
  Xanthium strumarium ssp. italicum (Moretti) D. Löve -- not accepted
  Xanthium strumarium var. canadense (Mill.) Torr. & A. Gray -- not accepted -- rough cocklebur, cocklebur, common cocklebur, Canada cockleburr, rough cockleburr, Canada cocklebur
  Xanthium strumarium var. glabratum (DC.) Cronquist -- not accepted -- cocklebur, common cocklebur, rough cocklebur, rough cockleburr
  Xanthium strumarium var. oviforme (Wallr.) M. Peck -- not accepted
  Xanthium strumarium var. pensylvanicum (Wallr.) M. Peck -- not accepted
  Xanthium strumarium var. strumarium L. -- not accepted -- common cocklebur, rough cocklebur, cocklebur, rough cockleburr
  Xanthium strumarium var. wootonii (Cockerell) W.C. Martin & C.R. Hutchins -- not accepted
  Xanthium varians Greene -- not accepted
  Xanthium wootonii Cockerell -- not accepted
  Zexmenia hispida auct. non (Kunth) A. Gray ex Small -- not accepted
   

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