Achaetogeron A.Gray accepted as Erigeron L. (original description)
Achaetogeron wislizeni A.Gray accepted as Erigeron wislizeni (A.Gray) Greene (original description)
Aciphyllaea (DC.) A.Gray accepted as Thymophylla Lag. (original description)
Aciphyllaea acerosa (DC.) A.Gray accepted as Thymophylla acerosa (DC.) Strother (original description)
Actinella depressa Torr. & A.Gray ex A.Gray (original description)
Actinella scaposa var. mutica A.Gray (original description)
Aster fendleri A.Gray accepted as Symphyotrichum fendleri (A.Gray) G.L.Nesom (original description)
Brickellia fendleri A.Gray accepted as Brickelliastrum fendleri (A.Gray) R.M.King & H.Rob. (original description)
Chaenactis filifolia Harv. accepted as Chaenactis glabriuscula var. glabriuscula DC. (original description)
Chrysactinia A.Gray (original description)
Chrysactinia mexicana A.Gray (original description)
Dichaetophora A.Gray (original description)
Dichaetophora campestris A.Gray (original description)
Diplopappus ericoides var. hirtellus A.Gray (original description)
Diplostelma bellioides A.Gray accepted as Chaetopappa bellioides (A.Gray) Shinners (original description)
Franseria tenuifolia Harv. & A.Gray accepted as Ambrosia confertiflora DC. (original description)
Gutierrezia microcephala (DC.) A.Gray (original description)
Haploësthes A.Gray (original description)
Haploësthes greggii A.Gray (original description)
Haplopappus sphaerocephalus Harv. & A.Gray accepted as Acamptopappus sphaerocephalus var. sphaerocephalus (Harv. & A.Gray ex A.Gray) A.Gray (original description)
Helianthus laciniatus A.Gray (original description)
Heliomeris tenuifolius A.Gray (original description)
Hymenatherum gnaphaloides A.Gray (original description)
Hymenatherum gnaphalopsis A.Gray accepted as Thymophylla micropoides (DC.) Strother (original description)
Hymenatherum tagetoides (Torr. & A.Gray) A.Gray accepted as Dysodiopsis tagetoides (Torr. & A.Gray) Rydb. (original description)
Hymenatherum wrightii A.Gray accepted as Thymophylla tenuiloba var. wrightii (A.Gray) Strother (original description)
Hymenoclea Torr. & A.Gray ex Torr. & A.Gray accepted as Ambrosia L. (original description)
Hymenoclea monogyra Torr. & A.Gray accepted as Ambrosia monogyra (Torr. & A.Gray) Strother & B.G.Baldwin (original description)
Hymenoclea salsola Torr. & A.Gray ex Torr. & A.Gray accepted as Ambrosia salsola (Torr. & A.Gray) Strother & B.G.Baldwin (original description)
Hymenopappus flavescens A.Gray (original description)
Hymenothrix A.Gray (original description)
Hymenothrix wislizeni A.Gray (original description)
Layia calliglossa A.Gray accepted as Layia chrysanthemoides (DC.) A.Gray (original description)
Layia fremontii (Torr. & A.Gray ex A.Gray) A.Gray (original description)
Layia platyglossa (Fisch. & C.A.Mey.) A.Gray (original description)
Lowellia A.Gray accepted as Thymophylla Lag. (original description)
Lowellia aurea A.Gray accepted as Thymophylla aurea (A.Gray) Greene ex Greene (original description)
Malacothrix coulteri Harv. & A.Gray (original description)
Malacothrix coulteri Harv. & Gray ex A.Gray (original description)
Microrhynchus purpureus A.Gray accepted as Agoseris aurantiaca (Hook.) Greene (original description)
Pectis fastigiata A.Gray accepted as Pectis angustifolia var. angustifolia Torr. (original description)
Perezia nana A.Gray accepted as Acourtia nana (A.Gray) Reveal & R.M.King (original description)
Perezia platyphylla A.Gray accepted as Acourtia platyphylla (A.Gray) Reveal & R.M.King (original description)
Perezia wislizeni A.Gray accepted as Acourtia wislizeni (A.Gray) Reveal & R.M.King (original description)
Perityle leptoglossa Harv. & Gray ex Harv. & A.Gray (original description)
Perityle plumigera Harv. & Gray ex A.Gray (original description)
Psilactis A.Gray (original description)
Psilactis asteroides A.Gray (original description)
Psilactis coulteri A.Gray accepted as Machaeranthera coulteri (A.Gray) B.L.Turner & D.B.Horne (original description)
Ptilophora (Torr. & A.Gray ex Hook.) A.Gray accepted as Microseris D.Don (original description)
Ptilophora major A.Gray accepted as Microseris nutans (Hook.) Sch.Bip. (original description)
Ptilophora major var. laciniata A.Gray accepted as Microseris nutans (Hook.) Sch.Bip. (original description)
Ptilophora nutans (Hook.) A.Gray accepted as Microseris nutans (Hook.) Sch.Bip. (original description)
Riddellia arachnoidea A.Gray (original description)
Rudbeckia porteri A.Gray accepted as Helianthus porteri (A.Gray) Pruski (original description)
Sanvitalia aberti A.Gray (original description)
Schkuhria neomexicana A.Gray accepted as Picradeniopsis multiflora (Hook. & Arn.) B.G.Baldwin (original description)
Senecio eurycephalus Torr. & A.Gray accepted as Packera eurycephala (Torr. & A.Gray ex Torr. & A.Gray) W.A.Weber & Á.L (original description)
Senecio fendleri A.Gray accepted as Packera fendleri (A.Gray) W.A.Weber & Á.Löve (original description)
Senecio multilobatus Torr. & A.Gray ex A.Gray accepted as Packera multilobata (Torr. & A.Gray ex A.Gray) W.A.Weber & Á.Löve (original description)
Simsia canescens (Torr. & A.Gray) A.Gray accepted as Geraea canescens Torr. & A.Gray (original description)
Simsia subaristata A.Gray (original description)
Stevia trichopoda Harv. & A.Gray ex A.Gray accepted as Stevia elatior Kunth (original description)
Tagetes wislizeni A.Gray accepted as Tagetes subulata Cerv. (original description)
Taraxacum palustre var. latifolium A.Gray (original description)
Tithonia decurrens A.Gray accepted as Viguiera decurrens (A.Gray) A.Gray (original description)
Townsendia eximia A.Gray (original description)
Townsendia fendleri A.Gray (original description)
Townsendia mexicana A.Gray (original description)
Townsendia sericea var. papposa A.Gray (original description)
Trichocoronis A.Gray (original description)
Trichocoronis rivularis A.Gray accepted as Shinnersia rivularis (A.Gray) R.M.King & H.Rob. (original description)
Trichocoronis wrightii (Torr. & A.Gray) A.Gray (original description)
Tridax bicolor A.Gray (original description)
Varilla A.Gray (original description)
Varilla mexicana A.Gray (original description)
Zinnia pumila A.Gray accepted as Zinnia acerosa (DC.) A.Gray (original description)