Acamptopappus (A.Gray) A.Gray (original description)
Acamptopappus sphaerocephalus (Harv. & A.Gray) A.Gray (original description)
Adenostyles nardosmia (A.Gray) A.Gray accepted as Cacaliopsis nardosmia (A.Gray) A.Gray (original description)
Amphiachyris fremontii (Torr. & A.Gray) A.Gray accepted as Amphipappus fremontii Torr. & A.Gray ex A.Gray (original description)
Aster alpigenus (Torr. & A.Gray) A.Gray accepted as Oreostemma alpigenum (Torr. & A.Gray) Greene (original description)
Aster arenarioides A.Gray accepted as Erigeron arenarioides (D.C.Eaton ex A.Gray) A.Gray ex Rydb. (original description)
Aster engelmannii var. ledophyllus A.Gray accepted as Eucephalus ledophyllus var. ledophyllus (A.Gray) Greene (original description)
Aster hallii A.Gray accepted as Symphyotrichum hallii (A.Gray) G.L.Nesom (original description)
Aster radulinus A.Gray accepted as Eurybia radulina (A.Gray) G.L.Nesom (original description)
Bigelowia arborescens A.Gray accepted as Ericameria arborescens (A.Gray) Greene (original description)
Bigelowia bolanderi (A.Gray) A.Gray accepted as Ericameria bolanderi (A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia ceruminosa (Durand & Hilg.) A.Gray accepted as Ericameria nauseosa var. ceruminosa (Durand & Hilg.) G.L.Nesom & G.I.Baird (original description)
Bigelowia cooperi A.Gray accepted as Ericameria cooperi (A.Gray) H.M.Hall (original description)
Bigelowia coronopifolia (A.Gray) A.Gray accepted as Isocoma coronopifolia (A.Gray) Greene (original description)
Bigelowia depressa (Nutt.) A.Gray accepted as Chrysothamnus depressus Nutt. (original description)
Bigelowia diffusa (Benth.) A.Gray accepted as Xylothamia diffusa (Benth.) G.L.Nesom (original description)
Bigelowia douglasii A.Gray accepted as Chrysothamnus viscidiflorus (Hook.) Nutt. (original description)
Bigelowia douglasii var. latifolia (D.C.Eaton) A.Gray accepted as Chrysothamnus viscidiflorus subsp. viscidiflorus (Hook.) Nutt. (original description)
Bigelowia douglasii var. puberula (D.C.Eaton) A.Gray accepted as Chrysothamnus viscidiflorus subsp. puberulus (D.C.Eaton) H.M.Hall & Clem. (original description)
Bigelowia douglasii var. serrulata (Torr.) A.Gray (original description)
Bigelowia douglasii var. stenophylla A.Gray (original description)
Bigelowia douglasii var. tortifolia A.Gray (original description)
Bigelowia drummondii (Torr. & A.Gray) A.Gray accepted as Isocoma drummondii (Torr. & A.Gray) Greene (original description)
Bigelowia fuliginea A.Gray (original description)
Bigelowia graveolens (Nutt.) A.Gray accepted as Ericameria nauseosa var. graveolens (Nutt.) Reveal & Schuyler (original description)
Bigelowia graveolens var. albicaulis (Nutt.) A.Gray accepted as Ericameria nauseosa var. speciosa (Nutt.) G.L.Nesom & G.I.Baird (original description)
Bigelowia graveolens var. glabrata A.Gray accepted as Ericameria nauseosa var. graveolens (Nutt.) Reveal & Schuyler (original description)
Bigelowia graveolens var. hololeuca A.Gray accepted as Ericameria nauseosa var. hololeuca (A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia graveolens var. latisquamea A.Gray accepted as Ericameria nauseosa var. latisquamea (A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia howardii (Parry ex A.Gray) A.Gray accepted as Ericameria parryi var. howardii (Parry ex A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia howardii var. nevadensis (A.Gray) A.Gray accepted as Ericameria parryi var. nevadensis (A.Gray) G.L.Nesom & G.I.Baird (original description)
Bigelowia hypoleuca A.Gray (original description)
Bigelowia lanceolata (Nutt.) A.Gray accepted as Chrysothamnus viscidiflorus subsp. lanceolatus (Nutt.) H.M.Hall & Clem. (original description)
Bigelowia menziesii (Hook. & Arn.) A.Gray accepted as Isocoma menziesii (Hook. & Arn.) G.L.Nesom (original description)
Bigelowia paniculata A.Gray accepted as Ericameria paniculata (A.Gray) A.Gray ex Rydb. (original description)
Bigelowia parryi (A.Gray) A.Gray accepted as Chrysothamnus parryi (A.Gray) Greene (original description)
Bigelowia pluriflora (Torr. & A.Gray) A.Gray accepted as Isocoma pluriflora (Torr. & A.Gray) Greene (original description)
Bigelowia pulchella (A.Gray) A.Gray accepted as Lorandersonia pulchella (A.Gray) Urbatsch, R.P.Roberts & Neubig (original description)
Bigelowia sect. Chrysothamnus A.Gray (original description)
Bigelowia teretifolia (Durand & Hilg.) A.Gray accepted as Ericameria teretifolia (Durand & Hilg.) Jeps. (original description)
Bigelowia veneta (Kunth) A.Gray accepted as Isocoma veneta (Kunth) Greene (original description)
Bigelowia wrightii (A.Gray) A.Gray accepted as Isocoma pluriflora (Torr. & A.Gray) Greene (original description)
Brachyactis frondosa (Nutt.) A.Gray accepted as Symphyotrichum frondosum (Nutt.) G.L.Nesom (original description)
Brickellia atractyloides A.Gray (original description)
Carphephorus sect. Kuhnioides A.Gray (original description)
Chaenactis brachypappa A.Gray accepted as Chaenactis stevioides Hook. & Arn. (original description)
Encelia albescens A.Gray accepted as Verbesina encelioides (Cav.) Benth. & Hook.f. ex A.Gray (original description)
Encelia argophylla (D.C.Eaton) A.Gray accepted as Enceliopsis argophylla (D.C.Eaton) A.Nelson (original description)
Encelia calva (A.Gray) A.Gray accepted as Simsia calva A.Gray (original description)
Encelia eriocephala A.Gray accepted as Geraea canescens Torr. & A.Gray (original description)
Encelia frutescens (A.Gray) A.Gray (original description)
Encelia ghiesbreghtii A.Gray accepted as Simsia ghiesbreghtii (A.Gray) S.F.Blake (original description)
Encelia microcephala A.Gray accepted as Helianthella microcephala (A.Gray) A.Gray (original description)
Encelia nudicaulis A.Gray accepted as Enceliopsis nudicaulis (A.Gray) A.Nelson (original description)
Encelia scaposa (A.Gray) A.Gray (original description)
Erigeron argentatus A.Gray (original description)
Erigeron ervendbergii A.Gray (original description)
Erigeron nevadensis A.Gray accepted as Erigeron eatonii var. nevadincola (S.F.Blake) G.L.Nesom (original description)
Erigeron nevadensis var. pygmaeus A.Gray accepted as Erigeron pygmaeus (A.Gray) Greene (original description)
Erigeron nevadensis var. pygmaeus A.Gray (original description)
Erigeron stenophyllus var. tetrapleurus A.Gray accepted as Erigeron utahensis A.Gray (original description)
Filago arizonica A.Gray accepted as Logfia arizonica (A.Gray) Holub (original description)
Haplopappus cuneatus A.Gray accepted as Ericameria cuneata (A.Gray) McClatchie (original description)
Haplopappus hallii A.Gray accepted as Columbiadoria hallii (A.Gray) G.L.Nesom (original description)
Haplopappus pinifolius A.Gray accepted as Ericameria pinifolia (A.Gray) H.M.Hall (original description)
Linosyris sonoriensis A.Gray accepted as Xylothamia diffusa (Benth.) G.L.Nesom (original description)
Linosyris squamata A.Gray accepted as Lepidospartum squamatum (A.Gray) A.Gray (original description)
Linosyris squamata var. breweri A.Gray (original description)
Linosyris squamata var. palmeri A.Gray (original description)
Madia bolanderi (A.Gray) A.Gray accepted as Kyhosia bolanderi (A.Gray) B.G.Baldwin (original description)
Madia filipes A.Gray accepted as Madia exigua (Sm.) A.Gray (original description)
Madia nuttallii A.Gray accepted as Anisocarpus madioides Nutt. (original description)
Melampodium cupulatum A.Gray (original description)
Mesoneuris A.Gray (original description)
Mesoneuris bipinnatifida A.Gray (original description)
Nardophyllum genistoides (Phil.) A.Gray (original description)
Pentachaeta exilis (A.Gray) A.Gray (original description)
Psilocarphus globiferus (Bertero ex DC.) A.Gray accepted as Psilocarphus tenellus Nutt. (original description)
Psilocarphus oreganus A.Gray (original description)
Pugiopappus calliopsideus (DC.) A.Gray (original description)
Silphium gracile A.Gray accepted as Silphium radula var. gracile (A.Gray) J.A. Clevinger (original description)
Stylocline filaginea (A.Gray) A.Gray (original description)
Stylocline griffithii A.Gray accepted as Filago griffithii (A.Gray) Andrés-Sánchez & Galbany (original description)
Stylocline sect. Ancistrocarphus (A.Gray) A.Gray accepted as Ancistrocarphus A.Gray (original description)
Tithonia thurberi A.Gray (original description)
Wyethia arizonica A.Gray (original description)
Xanthocephalum wrightii (A.Gray) A.Gray accepted as Gutierrezia wrightii A.Gray (original description)