Equisetum hyemale ssp. affine
PNW
AK
BC
ID
MT
OR
WA
YK
399 specimens from 27 herbaria:
Alaska (7)
British Columbia (55)
Idaho (63)
Montana (54)
Oregon (78)
Washington (137)
Yukon Territory (5)
195 images from 22 herbaria:
BABY (1)
BBLM (2)
CIC (3)
CIC-PYNF (1)
CRMO (2)
EWU (2)
HJAEF (1)
ID (17)
IDS (9)
MONT (1)
MONTU (2)
NOCA (2)
REED (1)
RM (6)
SOC (5)
SRP (6)
UBC (5)
USFS (10)
VALE (3)
WCW (2)
WTU (113)
WWB (1)