Agoseris montana Osterh. (original description)
Antennaria dimorpha var. integra L.F.Hend. accepted as Antennaria dimorpha (Nutt.) Torr. & A.Gray (original description)
Artemisia aromatica A.Nelson accepted as Artemisia dracunculus var. dracunculus L. (original description)
Artemisia coloradensis Osterh. accepted as Artemisia carruthii Alph.Wood ex Carruth. (original description)
Artemisia gracilenta A.Nelson accepted as Artemisia ludoviciana subsp. candicans (Rydb.) D.D.Keck (original description)
Artemisia nova A.Nelson (original description)
Artemisia paucicephala A.Nelson accepted as Artemisia ludoviciana subsp. ludoviciana Nutt. (original description)
Artemisia rhizomata A.Nelson accepted as Artemisia ludoviciana subsp. ludoviciana Nutt. (original description)
Artemisia rhizomata var. pabularis A.Nelson accepted as Artemisia ludoviciana Nutt. (original description)
Artemisia spiciformis Osterh. (original description)
Artemisia subglabra A.Nelson (original description)
Aster cordalenus L.F.Hend. accepted as Symphyotrichum eatonii (A.Gray) G.L.Nesom (original description)
Balsamorhiza ×tomentosa Rydb. (original description)
Balsamorhiza floccosa Rydb. (original description)
Erigeron curvifolius Piper accepted as Erigeron chrysopsidis A.Gray (original description)
Erigeron luteus A.Nelson accepted as Erigeron linearis (Hook.) Piper (original description)
Pyrrocoma integrifolia var. pumila Rydb. (original description)
Pyrrocoma villosa Rydb. accepted as Pyrrocoma clementis var. villosa (Rydb.) Mayes ex G.K.Br. & D.J.Keil (original description)
Senecio heterodoxus Greene ex Rydb. accepted as Packera dimorphophylla var. dimorphophylla (Greene) W.A.Weber & Á.Löve (original description)
Senecio millelobatus Rydb. (original description)
Sideranthus rubiginosus Britton (original description)