Sonchus arvensis ssp. uliginosus
PNW
AK
BC
ID
MT
OR
WA
YK
189 specimens from 19 herbaria:
Alaska (8)
British Columbia (23)
Idaho (13)
Montana (93)
Oregon (17)
Washington (31)
Yukon Territory (4)
104 images from 14 herbaria:
ALA (5)
HPSU (1)
ID (12)
IDS (2)
MONT (37)
MONTU (11)
NOCA (4)
PNNL (1)
RM (4)
SBLM (1)
UAAH (1)
USFS (6)
WTU (17)
WWB (2)