Rheum rhabarbarum
PNW
BC
ID
MT
WA
14 specimens from 7 herbaria:
British Columbia (2)
Idaho (2)
Montana (3)
Washington (6)
12 images from 7 herbaria:
BABY (1)
ID (2)
MONTU (2)
PLU (1)
UBC (1)
WS (1)
WTU (4)