Equisetum arvense
PNW
AK
BC
ID
MT
OR
WA
YK
2449 specimens from 41 herbaria:
Alaska (430)
British Columbia (652)
Idaho (339)
Montana (355)
Oregon (203)
Washington (415)
Yukon Territory (55)
1246 images from 36 herbaria:
ALA (348)
BBLM (1)
BBLM-OWY (1)
BOIS (6)
CIC (52)
CIC-PYNF (3)
CIC-SHO (1)
EWU (15)
HJAEF (1)
HJAEFB (1)
HPSU (13)
ID (112)
IDE (19)
IDS (35)
LEA (3)
LINF (6)
MONT (43)
MONTU (110)
NOCA (10)
PLU (2)
PNNL (1)
PSM (77)
REED (9)
RM (20)
SBLM (1)
SOC (10)
SRP (58)
UAAH (20)
UBC (25)
USFS (39)
UWB (2)
VALE (4)
WCW (20)
WSTC (7)
WTU (150)
WWB (21)