Anaphalis margaritacea var. subalpina (A.Gray) A.Gray accepted as Anaphalis margaritacea (L.) Benth. & Hook.f. (original description)
Apogon wrightii A.Gray accepted as Krigia wrightii (A.Gray) K.L.Chambers ex K.J.Kim (original description)
Aster canbyi Vasey ex A.Gray accepted as Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom (original description)
Aster canescens var. latifolius (A.Gray) A.Gray accepted as Dieteria asteroides Torr. (original description)
Aster canescens var. viscosus (Nutt.) A.Gray accepted as Dieteria canescens var. canescens (Pursh) Nutt. (original description)
Aster commutatus (Torr. & A.Gray) A.Gray accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (original description)
Aster diffusus var. thyrsoideus A.Gray accepted as Symphyotrichum ontarionis (Wiegand) G.L.Nesom (original description)
Aster elegans hort.par. ex A.Gray (original description)
Aster engelmannii var. glaucescens A.Gray accepted as Eucephalus glaucescens (A.Gray) Greene (original description)
Aster ericoides var. pringlei A.Gray accepted as Symphyotrichum pilosum (Willd.) G.L.Nesom (original description)
Aster ericoides var. pusillus A.Gray accepted as Symphyotrichum depauperatum (Fernald) G.L.Nesom (original description)
Aster exilis var. australis A.Gray accepted as Aster squamatus (Spreng.) Hieron. (original description)
Aster foliaceus var. apricus A.Gray accepted as Symphyotrichum foliaceum var. apricum (A.Gray) G.L.Nesom (original description)
Aster foliaceus var. burkei A.Gray accepted as Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom (original description)
Aster foliaceus var. canbyi A.Gray accepted as Symphyotrichum foliaceum var. canbyi (A.Gray) G.L.Nesom (original description)
Aster fremontii (Torr. & A.Gray) A.Gray accepted as Symphyotrichum spathulatum var. spathulatum (Lindl.) G.L.Nesom (original description)
Aster fremontii var. parishii A.Gray accepted as Symphyotrichum spathulatum var. spathulatum (Lindl.) G.L.Nesom (original description)
Aster hesperius A.Gray accepted as Symphyotrichum lanceolatum (Willd.) G.L.Nesom (original description)
Aster kumleini Fr. ex A.Gray (original description)
Aster laevis var. geyeri A.Gray accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (original description)
Aster lemmonii A.Gray accepted as Symphyotrichum potosinum (A.Gray) G.L.Nesom (original description)
Aster longifolius var. villicaulis A.Gray accepted as Symphyotrichum novi-belgii var. villicaule (A.Gray) Labrecque & Brouillet (original description)
Aster ptarmicoides var. lutescens (Lindl. ex DC.) A.Gray accepted as Solidago lutescens (Lindl. ex DC.) B.Boivin (original description)
Aster radula var. strictus (Pursh) A.Gray accepted as Eurybia radula (Sol. ex Aiton) G.L.Nesom (original description)
Aster sect. Glandulosi A.Gray (original description)
Aster sect. Sericeo-Concolores A.Gray (original description)
Aster sericeus var. montanus (Nutt.) A.Gray accepted as Symphyotrichum sericeum (Vent.) G.L.Nesom (original description)
Aster shastensis var. eradiatus A.Gray accepted as Dieteria canescens var. shastensis (A.Gray) D.R.Morgan & R.L.Hartm. (original description)
Aster subsect. Heterophylli (Nees) A.Gray (original description)
Aster subsect. Laeves A.Gray (original description)
Aster subsect. Sagittiferi A.Gray (original description)
Aster subsect. Spectabiles A.Gray (original description)
Aster subsect. Vulgares A.Gray (original description)
Aster umbellatus var. pubens A.Gray accepted as Doellingeria umbellata (Mill.) Nees (original description)
Atrichoseris A.Gray (original description)
Atrichoseris platyphylla (A.Gray) A.Gray (original description)
Baccharis havardii A.Gray accepted as Baccharis sulcata DC. (original description)
Baeria debilis Greene ex A.Gray accepted as Lasthenia debilis (Greene ex A.Gray) Ornduff (original description)
Baeria leptalea (A.Gray) A.Gray accepted as Lasthenia leptalea (A.Gray) Ornduff (original description)
Bidens lemmonii A.Gray (original description)
Bigelowia hartwegii A.Gray accepted as Isocoma hartwegii (A.Gray) Greene (original description)
Bigelowia leiosperma A.Gray accepted as Ericameria nauseosa var. leiosperma (A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia mohavensis Greene ex A.Gray accepted as Ericameria nauseosa var. mohavensis (Greene) G.L.Nesom & G.I.Baird (original description)
Bigelowia nevadensis (A.Gray) A.Gray accepted as Ericameria parryi var. nevadensis (A.Gray) G.L.Nesom & G.I.Baird (original description)
Brickellia mohavensis A.Gray accepted as Brickellia oblongifolia Nutt. (original description)
Brickellia rusbyi A.Gray (original description)
Chaenactis douglasii var. alpina A.Gray (original description)
Chrysopsis graminifolia var. aspera (Shuttlew. ex Small) A.Gray accepted as Pityopsis aspera var. aspera (Shuttlew. ex Small) Small (original description)
Chrysopsis oregona var. scaberrima (ex Gray) A.Gray accepted as Heterotheca oregona var. scaberrima (A.Gray) Semple (original description)
Chrysopsis villosa var. bolanderi (A.Gray) A.Gray accepted as Heterotheca sessiliflora subsp. bolanderi (A.Gray) Semple (original description)
Chrysopsis villosa var. hispida (Hook.) A.Gray accepted as Heterotheca villosa var. minor (Hook.) Semple (original description)
Chrysopsis villosa var. viscida A.Gray accepted as Heterotheca viscida (A.Gray) V.L.Harms (original description)
Chrysopsis wrightii A.Gray accepted as Aster breweri (A.Gray) Semple (original description)
Cnicus breweri var. vaseyi A.Gray accepted as Cirsium hydrophilum var. vaseyi (A.Gray) J.T.Howell (original description)
Cnicus scariosus A.Gray accepted as Cirsium scariosum (Poir.) Nutt. (original description)
Coreopsis harveyana A.Gray accepted as Coreopsis grandiflora Hogg ex Sweet (original description)
Corethrogyne filaginifolia var. rigida (Benth.) A.Gray accepted as Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (original description)
Crepis intermedia A.Gray (original description)
Crockeria Greene ex A.Gray accepted as Lasthenia Cass. (original description)
Crockeria chrysantha Greene ex A.Gray accepted as Lasthenia chrysantha (Greene ex A.Gray) Greene (original description)
Erechtites elongatus A.Gray accepted as Erechtites hieraciifolius (L.) Raf. ex DC. (original description)
Erigeron brandegeei A.Gray accepted as Erigeron concinnus var. concinnus (Hook. & Arn.) Torr. & A.Gray (original description)
Erigeron chrysopsidis A.Gray (original description)
Erigeron howellii (A.Gray) A.Gray (original description)
Erigeron incomptus A.Gray accepted as Erigeron divergens Torr. & A.Gray (original description)
Erigeron inornatus var. angustatus A.Gray accepted as Erigeron greenei G.L.Nesom (original description)
Erigeron inornatus var. viscidulus A.Gray accepted as Erigeron petrophilus var. viscidulus (A.Gray) G.L.Nesom (original description)
Erigeron leiomerus A.Gray (original description)
Erigeron parishii A.Gray (original description)
Erigeron poliospermus A.Gray (original description)
Erigeron repens A.Gray accepted as Erigeron procumbens (Houst. ex Mill.) G.L.Nesom (original description)
Erigeron rusbyi A.Gray accepted as Erigeron arizonicus A.Gray (original description)
Erigeron subdecurrens Sch.Bip. ex A.Gray accepted as Laennecia schiedeana (Less.) G.L.Nesom (original description)
Eupatorium ageratoides var. angustatum A.Gray accepted as Ageratina altissima (L.) R.M.King & H.Rob. (original description)
Eupatorium aromaticum var. incisum A.Gray accepted as Ageratina jucunda (Greene) Clewell & Wooten (original description)
Eupatorium bruneri A.Gray accepted as Eupatorium maculatum L. (original description)
Eupatorium crassifolium Shuttlew. ex A.Gray accepted as Eupatorium mikanioides Chapm. (original description)
Eupatorium greggii A.Gray accepted as Conoclinium greggii (A.Gray) Small (original description)
Eupatorium rothrockii A.Gray accepted as Ageratina rothrockii (A.Gray) R.M.King & H.Rob. (original description)
Evax candida (Torr. & A.Gray) A.Gray accepted as Diaperia candida (Torr. & A.Gray) Benth. & Hook.f. (original description)
Evax caulescens var. brevifolia A.Gray accepted as Hesperevax sparsiflora var. brevifolia (A.Gray) Morefield (original description)
Evax caulescens var. sparsiflora A.Gray accepted as Hesperevax sparsiflora (A.Gray) Greene (original description)
Evax sect. Calymmandra (Torr. & A.Gray) A.Gray (original description)
Evax sect. Diaperia (Nutt.) A.Gray accepted as Diaperia Nutt. (original description)
Franseria cordifolia A.Gray accepted as Ambrosia cordifolia (A.Gray) W.W.Payne (original description)
Gaillardia arizonica A.Gray (original description)
Gaillardia pulchella var. picta (D.Don) A.Gray accepted as Gaillardia pulchella Foug. (original description)
Grindelia oregana A.Gray accepted as Grindelia hirsutula Hook. & Arn. (original description)
Haplopappus berberidis A.Gray accepted as Hazardia berberidis (A.Gray) Greene (original description)
Haplopappus brandegeei A.Gray accepted as Erigeron aureus Greene (original description)
Haplopappus greenei var. mollis (A.Gray) A.Gray accepted as Ericameria greenei (A.Gray) G.L.Nesom (original description)
Haplopappus hirtus A.Gray accepted as Pyrrocoma hirta var. hirta (A.Gray) Greene (original description)
Haplopappus subg. Ericameria (Nutt.) A.Gray accepted as Ericameria Nutt. (original description)
Haplopappus subg. Macronema (Nutt.) A.Gray accepted as Ericameria Nutt. (original description)
Helenium microcephalum M.A.Curtis ex A.Gray (original description)
Helianthus dealbatus A.Gray accepted as Helianthus niveus (Benth.) Brandegee (original description)
Helianthus neglectus Otto ex A.Gray (original description)
Helianthus parviflorus var. attenuatus A.Gray accepted as Helianthus smithii Heiser (original description)
Helianthus sparsiflorus A.Gray (original description)
Helianthus subtuberosus Bourg. ex A.Gray (original description)