Penstemon davidsonii
PNW
BC
ID
MT
OR
WA
829 specimens from 24 herbaria:
British Columbia (78)
Idaho (2)
Montana (5)
Oregon (356)
Washington (387)
434 images from 20 herbaria:
BLMVL (1)
CIC (10)
COCC (7)
EWU (4)
HPSU (12)
ID (31)
IDS (7)
MORA (17)
NOCA (19)
OSC (139)
PLU (16)
PSM (7)
REED (4)
SOC (28)
SRP (6)
UBC (16)
WCW (7)
WS (2)
WTU (80)
WWB (21)