WoRMS source details
in Canad. Field-Nat., 108(1): 94 (1994):.
319386
Publication
Date
action
by
Petasites frigidus subsp. nivalis (Greene) Cody accepted as Petasites frigidus var. frigidus (L.) Fr. (original description)
Petasites frigidus subsp. palmatus (Aiton) Cody accepted as Petasites frigidus var. palmatus (Aiton) Cronquist (original description)
Petasites frigidus subsp. palmatus (Aiton) Cody accepted as Petasites frigidus var. palmatus (Aiton) Cronquist (original description)