Potamogeton friesii
PNW
AK
BC
ID
MT
OR
WA
YK
146 specimens from 13 herbaria:
Alaska (33)
British Columbia (58)
Idaho (2)
Montana (31)
Oregon (1)
Washington (11)
Yukon Territory (10)
55 images from 10 herbaria:
ALA (13)
BABY (2)
HPSU (1)
ID (8)
MONT (4)
MONTU (18)
UAAH (5)
UBC (2)
WCW (1)
WTU (1)