Arnica celsa A.Nelson accepted as Arnica chamissonis Less. (original description)
Arnica greenei A.Nelson accepted as Arnica chamissonis Less. (original description)
Arnica platyphylla A.Nelson accepted as Arnica latifolia Bong. (original description)
Arnica rhizomata A.Nelson accepted as Arnica chamissonis Less. (original description)
Arnica stricta A.Nelson accepted as Arnica chamissonis Less. (original description)
Coleosanthus congestus A.Nelson accepted as Brickellia grandiflora (Hook.) Nutt. (original description)
Eupatorium atromontanum A.Nelson accepted as Eutrochium maculatum var. bruneri (A.Gray) E.E.Lamont (original description)
Kuhnia fitzpatrickii A.Nelson (original description)
Kuhnia gooddingii A.Nelson (original description)
Kuhnia hitchcockii A.Nelson accepted as Brickellia eupatorioides var. corymbulosa (Torr. & A.Gray) Shinners (original description)
Kuhnia reticulata A.Nelson (original description)
Lacinaria alata A.Nelson (original description)
Lacinaria ligulistylis A.Nelson accepted as Liatris ligulistylis (A.Nelson) K.Schum. (original description)
Oonopsis monocephala A.Nelson accepted as Oonopsis foliosa var. monocephala (A.Nelson) Kartesz & Gandhi (original description)
Phalacroseris bolanderi var. coronata H.M.Hall accepted as Phalacroseris bolanderi A.Gray (original description)