Sonchus oleraceus
PNW
AK
BC
ID
MT
OR
WA
285 specimens from 30 herbaria:
Alaska (2)
British Columbia (38)
Idaho (33)
Montana (19)
Oregon (55)
Washington (138)
174 images from 21 herbaria:
BBLM (1)
BOIS (2)
CIC (4)
HPSU (2)
ID (15)
IDE (7)
IDS (7)
LINF (1)
MONT (7)
MONTU (5)
NOCA (3)
PLU (6)
PNNL (1)
PSM (7)
REED (1)
SOC (5)
SRP (4)
UAAH (2)
WCW (3)
WTU (85)
WWB (6)