WoRMS source details
(1994). Canad. Field-Naturalist 108(1)
313250
1994
Publication
Date
action
by
Petasites frigidus subsp. arcticus (A.E.Porsild) Cody accepted as Petasites frigidus var. palmatus (Aiton) Cronquist (original description)
Petasites frigidus subsp. nivalis (Greene) Cody accepted as Petasites frigidus var. frigidus (L.) Fr. (original description)
Petasites frigidus subsp. palmatus (Aiton) Cody (original description)
Petasites frigidus subsp. nivalis (Greene) Cody accepted as Petasites frigidus var. frigidus (L.) Fr. (original description)
Petasites frigidus subsp. palmatus (Aiton) Cody (original description)