Pediocactus simpsonii
PNW
ID
MT
OR
WA
51 specimens from 11 herbaria:
Idaho (38)
Montana (9)
Oregon (1)
Washington (3)
38 images from 9 herbaria:
ID (10)
IDS (11)
MONT (3)
MONTU (5)
NEZ (1)
SRP (5)
UBC (1)
WTU (1)
WWB (1)