Synonyms
Arnica macounii Greene
Arnica mollis var. piperi (H.St.John) B.Boivin
Arnica macounii var. aspera (Greene) G.N.Jones
Arnica amplexicaulis subsp. genuina Maguire
Arnica amplexifolia var. borealis (Rydb.) Maguire
Arnica amplexifolia var. trina (A.Nelson) Maguire
Arnica borealis Rydb.
Arnica mollis var. aspera (Greene) B.Boivin
Arnica amplexicaulis var. piperi H.St.John
Arnica amplexicaulis subsp. prima Maguire
Arnica amplexicaulis var. prima (Maguire) B.Boivin
Arnica filipes Greene ex Rydb.
Arnica aspera Greene
Arnica amplexifolia subsp. prima Maguire
Arnica amplexifolia Rydb.
Arnica amplexifolia subsp. genuina Maguire
Arnica hirticaulis Rydb.
Arnica lanceolata subsp. amplexicaulis (Nutt.) Gruezo
Arnica trina A.Nelson
Arnica elongata Rydb.