Petasites frigidus var. frigidus
PNW
AK
BC
OR
WA
369 specimens from 16 herbaria:
Alaska (74)
British Columbia (196)
Oregon (8)
Washington (86)
99 images from 12 herbaria:
CIC (1)
HPSU (3)
ID (2)
MORA (4)
NOCA (10)
OSC (1)
UAAH (18)
UBC (4)
WCW (4)
WS (41)
WTU (6)
WWB (5)