Silybum marianum
PNW
BC
OR
WA
75 specimens from 10 herbaria:
British Columbia (7)
Oregon (52)
Washington (16)
31 images from 8 herbaria:
EWU (3)
HPSU (2)
ID (5)
OSC (3)
SOC (2)
SRP (3)
UBC (4)
WTU (9)