Potamogeton friesii
PNW
AK
BC
ID
MT
OR
WA
122 specimens from 11 herbaria:
Alaska (12)
British Columbia (59)
Idaho (2)
Montana (32)
Oregon (1)
Washington (10)
51 images from 8 herbaria:
BABY (2)
HPSU (1)
ID (8)
MONT (4)
MONTU (21)
UAAH (11)
WCW (1)
WTU (3)