Lactuca biennis
PNW
AK
BC
ID
MT
OR
WA
216 specimens from 20 herbaria:
Alaska (4)
British Columbia (34)
Idaho (47)
Montana (24)
Oregon (36)
Washington (68)
111 images from 16 herbaria:
CIC (4)
HJAEFB (1)
ID (20)
IDE (2)
IDS (6)
MONT (9)
MONTU (18)
NOCA (2)
OSC (3)
PSM (6)
SRP (2)
UAAH (3)
UBC (27)
WCW (1)
WTU (4)
WWB (3)