Arnica alpina var. attenuata (Greene) Ediger & T.M.Barkley accepted as Arnica angustifolia subsp. angustifolia Vahl (original description)
Arnica alpina var. plantaginea (Pursh) Ediger & T.M.Barkley accepted as Arnica angustifolia subsp. angustifolia Vahl (original description)
Arnica chamissonis var. andina (Nutt.) Ediger & T.M.Barkley accepted as Arnica chamissonis Less. (original description)
Arnica spathulata var. eastwoodiae (Rydb.) Ediger & T.M.Barkley accepted as Arnica spathulata Greene (original description)
Elephantopus spiralis (Less.) Clonts accepted as Pseudelephantopus spiralis (Less.) Cronquist (original description)
Senecio ertterae T.M.Barkley (original description)
Senecio neomexicanus var. metcalfei (Greene ex Wooton & Standl.) T.M.Barkley accepted as Packera neomexicana var. mutabilis (Greene) W.A.Weber & Á.Löve (original description)
Senecio neomexicanus var. mutabilis (Greene) T.M.Barkley accepted as Packera neomexicana var. mutabilis (Greene) W.A.Weber & Á.Löve (original description)
Senecio neomexicanus var. toumeyi (Greene) T.M.Barkley accepted as Packera neomexicana var. toumeyi (Greene) Trock & T.M.Barkley (original description)
Vernonia angustifolia subsp. mohrii (S.B.Jones) S.B.Jones & W.Z.Faust (original description)
Vernonia angustifolia subsp. scaberrima (Nutt.) S.B.Jones & W.Z.Faust (original description)
Vernonia angustifolia subsp. scaberrima (Nuttall) S.B.Jones & W.Z.Faust (original description)