Actinella acaulis caespitosa A.Nelson (original description)
Actinella epunctata (A.Nelson) A.Nelson accepted as Tetraneuris acaulis var. epunctata (A.Nelson) Kartesz & Gandhi (new combination reference)
Actinella incana A.Nelson (original description)
Actinella linearis (Nutt.) A.Nelson accepted as Tetraneuris scaposa var. scaposa (DC.) Greene (original description)
Antennaria parvifolia var. bracteosa (Rydb.) A.Nelson (original description)
Arnica subplumosa var. macilenta (Greene) A.Nelson accepted as Arnica chamissonis Less. (original description)
Arnica subplumosa var. sylvatica A.Nelson (original description)
Artemisia gnaphalodes var. diversifolia (Rydb.) A.Nelson accepted as Artemisia ludoviciana Nutt. (original description)
Artemisia mexicana var. bakeri A.Nelson (original description)
Artemisia mexicana var. silvicola A.Nelson (original description)
Artemisia saxicola var. parryi (A.Gray) A.Nelson accepted as Artemisia laciniata subsp. parryi (A.Gray) W.A.Weber (original description)
Artemisia wrightii var. coloradensis (Osterh.) A.Nelson accepted as Artemisia carruthii Alph.Wood ex Carruth. (original description)
Aster glaucus var. formosus (Greene) A.Nelson accepted as Herrickia glauca var. glauca (Nutt.) Brouillet (original description)
Balsamorhiza hookeri var. hirsuta (Nutt.) A.Nelson accepted as Balsamorhiza hookeri (Hook.) Nutt. (original description)
Balsamorhiza macrophylla var. terebinthacea (Hook.) A.Nelson accepted as Balsamorhiza terebinthacea (Hook.) Nutt. (original description)
Brickellia albicaulis (Rydb.) A.Nelson accepted as Brickellia californica (Torr. & A.Gray) A.Gray (original description)
Brickellia humilis (Greene) A.Nelson (original description)
Brickellia scaber A.Nelson (original description)
Brickellia umbellata (Greene) A.Nelson accepted as Brickellia grandiflora (Hook.) Nutt. (original description)
Carduus americanus var. perplexans (Rydb.) A.Nelson accepted as Cirsium perplexans (Rydb.) Petr. (original description)
Carduus hookerianus var. eriocephalus (A.Gray) A.Nelson accepted as Cirsium eatonii var. eriocephalum (A.Gray) D.J.Keil (original description)
Carduus hookerianus var. hesperius (Eastw.) A.Nelson accepted as Cirsium eatonii var. hesperium (Eastw.) D.J.Keil (original description)
Carduus megacephalus A.Nelson accepted as Cirsium undulatum (Nutt.) Spreng. (original description)
Carduus nelsonii Pammel accepted as Cirsium canescens Nutt. (original description)
Carduus viridiflorus Greene (original description)
Chaenactis douglasii var. achilleifolia (Hook. & Arn.) A.Nelson accepted as Chaenactis douglasii var. douglasii (Hook.) Hook. & Arn. (original description)
Chrysopsis foliosa var. amplifolia (Rydb.) A.Nelson accepted as Heterotheca fulcrata var. amplifolia (Rydb.) Semple (original description)
Chrysopsis foliosa var. imbricata (A.Nelson) A.Nelson accepted as Heterotheca villosa var. foliosa (Nutt.) V.L.Harms (original description)
Chrysothamnus graveolens var. glabratus (A.Gray) A.Nelson (original description)
Erigeron divergens var. arenarius (Greene) A.Nelson accepted as Erigeron bellidiastrum var. arenarius (Greene) G.L.Nesom (original description)
Erigeron divergens var. nudiflorus (Buckley) A.Nelson accepted as Erigeron flagellaris Boiss. & Hausskn. ex Boiss. accepted as Lachnophyllum noeanum Boiss. (original description)
Erigeron ursinus var. gracilis (Rydb.) A.Nelson accepted as Erigeron gracilis Rydb. (original description)
Liatris ligulistylis A.Nelson (original description)
Senecio uintahensis A.Nelson (original description)
Troximon purpureum A.Nelson (original description)