Potamogeton berchtoldii
PNW
AK
BC
ID
MT
OR
WA
266 specimens from 19 herbaria:
Alaska (12)
British Columbia (76)
Idaho (28)
Montana (24)
Oregon (35)
Washington (87)
110 images from 15 herbaria:
BABY (3)
CIC (6)
EWU (1)
HPSU (6)
ID (38)
IDE (2)
IDS (1)
MONT (1)
NOCA (6)
OSC (4)
SRP (2)
UAAH (4)
UBC (1)
WTU (25)
WWB (10)