Lemna trisulca
PNW
AK
BC
ID
MT
OR
WA
YK
246 specimens from 21 herbaria:
Alaska (32)
British Columbia (38)
Idaho (9)
Montana (69)
Oregon (18)
Washington (70)
Yukon Territory (10)
120 images from 14 herbaria:
ALA (27)
BABY (2)
EWU (12)
HPSU (2)
ID (9)
MONT (14)
MONTU (31)
NOCA (2)
UAAH (5)
UBC (2)
USFS (2)
WCW (2)
WTU (2)
WWB (8)