Equisetum ×ferrissii
PNW
BC
ID
MT
OR
WA
147 specimens from 15 herbaria:
British Columbia (15)
Idaho (11)
Montana (9)
Oregon (59)
Washington (53)
113 images from 13 herbaria:
CIC (5)
CIC-PYNF (1)
HPSU (2)
ID (6)
MONTU (6)
OSC (15)
SOC (1)
SRP (3)
UBC (5)
WCW (1)
WS (1)
WTU (65)
WWB (2)