Equisetum arvense
PNW
AK
BC
ID
MT
OR
WA
1914 specimens from 43 herbaria:
Alaska (111)
British Columbia (675)
Idaho (320)
Montana (182)
Oregon (177)
Washington (420)
1042 images from 39 herbaria:
BBLM (1)
BBLM-OWY (1)
BOIS (6)
CIC (52)
CIC-PYNF (3)
CIC-SHO (1)
COCC (2)
EWU (15)
HJAEF (1)
HJAEFB (1)
HPSU (18)
ID (134)
IDE (19)
IDS (35)
IFBLM (1)
LEA (3)
LINF (6)
MONT (46)
MONTU (112)
MORA (3)
NOCA (10)
OSC (112)
PLU (2)
PSM (91)
REED (9)
SAJH (1)
SBLM (1)
SEF (2)
SOC (10)
SRP (67)
TFBLM (1)
UAAH (24)
UBC (34)
UWB (2)
VALE (4)
WCW (20)
WS (12)
WTU (159)
WWB (21)