Equisetum sylvaticum
PNW
AK
BC
ID
MT
WA
YK
507 specimens from 21 herbaria:
Alaska (166)
British Columbia (172)
Idaho (65)
Montana (49)
Washington (33)
Yukon Territory (22)
291 images from 15 herbaria:
ALA (139)
BOIS (1)
ID (35)
IDS (2)
MONT (6)
MONTU (31)
NOCA (1)
PLU (3)
PSM (4)
SRP (9)
UAAH (8)
UBC (5)
WCW (3)
WTU (42)
WWB (2)