Arnica arcana A.Nelson accepted as Arnica gracilis Rydb. (original description)
Aspiliopsis Greenm. accepted as Podachaenium Benth. (original description)
Aspiliopsis pachyphylla Greenm. accepted as Podachaenium pachyphyllum (Sch.Bip. ex Klatt) R.K.Jansen, N.A.Harriman & Urb (original description)
Aster incertus A.Nelson (original description)
Aster meritus A.Nelson accepted as Eurybia merita (A.Nelson) G.L.Nesom (original description)
Bebbia aspera (Greene) A.Nelson accepted as Bebbia juncea var. aspera (Benth.) Greene (original description)
Centaurea rothrockii Greenm. accepted as Plectocephalus rothrockii (Greenm.) D.J.N.Hind (original description)
Chrysopsis imbricata A.Nelson accepted as Heterotheca villosa var. foliosa (Nutt.) V.L.Harms (original description)
Chrysopsis scabrifolia A.Nelson accepted as Heterotheca stenophylla var. stenophylla (A.Gray) Shinners (original description)
Coleosanthus venulosus A.Nelson (original description)
Encelia virginensis A.Nelson (original description)
Erigeron glacialis (Nutt.) A.Nelson (original description)
Erigeron nauseosus (M.E.Jones) A.Nelson (original description)
Gaillardia gracilis A.Nelson accepted as Gaillardia pinnatifida Torr. (original description)
Gutierrezia myriocephala A.Nelson accepted as Gutierrezia sarothrae (Pursh) Britton & Rusby (original description)
Gymnolomia nevadensis A.Nelson accepted as Heliomeris multiflora var. nevadensis (A.Nelson) Yates (original description)
Helianthella covillei A.Nelson accepted as Enceliopsis covillei (A.Nelson) S.F.Blake (original description)
Hofmeisteria viscosa A.Nelson (original description)
Hymenoclea fasciculata A.Nelson (original description)
Hymenopappus eriopodus A.Nelson accepted as Hymenopappus filifolius var. eriopodus (A.Nelson) B.L.Turner (original description)
Machaeranthera coronopifolia (Nutt.) A.Nelson accepted as Machaeranthera tanacetifolia (Kunth) Nees (original description)
Machaeranthera verna A.Nelson accepted as Dieteria asteroides Torr. (original description)
Neurolaena cobanensis Greenm. (original description)
Pectis miser A.Nelson (original description)
Pyrrocoma brachycephala A.Nelson (original description)
Pyrrocoma kennedyi A.Nelson (original description)
Senecio calyculatus Greenm. (original description)
Senecio petasioides Greenm. accepted as Roldana petasitis (Sims) H.Rob. & Brettell (original description)
Sideranthus gooddingii A.Nelson accepted as Xanthisma spinulosum var. gooddingii (A.Nelson) D.R.Morgan & R.L.Hartm. (original description)
Sideranthus gracilis (Nutt.) A.Nelson accepted as Xanthisma gracile (Nutt.) D.R.Morgan & R.L.Hartm. (original description)
Solidago scopulorum (A.Gray) A.Nelson accepted as Solidago multiradiata Aiton (original description)
Stenotopsis macleanii (Brandegee) A.Nelson accepted as Nestotus macleanii (Brandegee) R.P.Roberts, Urbatsch & Neubig (original description)
Stenotopsis mcleanii A.Nelson (original description)
Stenotus latifolius A.Nelson (original description)
Tetradymia axillaris A.Nelson (original description)
Tetraneuris epunctata A.Nelson accepted as Tetraneuris acaulis var. epunctata (A.Nelson) Kartesz & Gandhi (original description)
Tetraneuris eradiata A.Nelson accepted as Tetraneuris acaulis var. acaulis (Pursh) Greene (original description)
Tonestus A.Nelson (original description)
Tonestus laceratus A.Nelson (original description)
Tonestus lyallii (A.Gray) A.Nelson (original description)
Tonestus pygmaeus (Torr. & A.Gray) A.Nelson (original description)
Townsendia dejecta A.Nelson (original description)
Xylorhiza scopulorum A.Nelson accepted as Xylorhiza tortifolia var. tortifolia (Torr. & A.Gray) Greene (original description)