Pediocactus
nigrispinus
PNW
ID
OR
WA
48 specimens from 10 herbaria:
Idaho (9)
Oregon (16)
Washington (23)
31 images from 9 herbaria:
CIC (5)
COCC (1)
ID (3)
OSC (2)
PLU (1)
SRP (3)
TFBLM (1)
WTU (11)
WWB (4)
