Antennaria laingii A.E.Porsild accepted as Antennaria rosea subsp. confinis (Greene) R.J.Bayer (original description)
Antennaria philonipha A.E.Porsild accepted as Antennaria monocephala subsp. monocephala DC. (original description)
Arnica amplexifolia var. trina (A.Nelson) Maguire accepted as Pentacalia amplexicaulis (Kunth) Cuatrec. (original description)
Arnica chamissonis subsp. foliosa (Nutt.) Maguire accepted as Arnica chamissonis Less. (original description)
Iva ciliata var. macrocarpa S.F.Blake accepted as Iva annua L. (original description)
Silphium atropurpureum f. hirticaule Fernald (original description)
Solidago gigantea var. leiophylla Fernald accepted as Solidago gigantea Aiton (original description)