Petasites frigidus
PNW
AK
BC
ID
MT
OR
WA
YK
1415 specimens from 35 herbaria:
Alaska (442)
British Columbia (292)
Idaho (13)
Montana (69)
Oregon (211)
Washington (315)
Yukon Territory (73)
664 images from 26 herbaria:
ALA (308)
BABY (1)
BOIS (1)
CIC (2)
EWU (5)
HJAEFB (1)
HPSU (24)
ID (40)
IDS (3)
LEA (1)
LINF (15)
MONT (19)
MONTU (36)
NOCA (13)
PLU (19)
PSM (13)
REED (7)
RM (2)
SOC (10)
SRP (7)
UAAH (39)
UBC (26)
WCW (24)
WSTC (1)
WTU (19)
WWB (28)