Petasites frigidus var. frigidus
PNW
AK
BC
OR
WA
YK
379 specimens from 16 herbaria:
Alaska (88)
British Columbia (187)
Oregon (7)
Washington (73)
Yukon Territory (24)
99 images from 10 herbaria:
ALA (32)
CIC (1)
HPSU (1)
ID (2)
NOCA (10)
UAAH (18)
UBC (21)
WCW (4)
WTU (5)
WWB (5)