Penstemon davidsonii
PNW
BC
ID
MT
OR
WA
743 specimens from 22 herbaria:
British Columbia (75)
Idaho (2)
Montana (5)
Oregon (343)
Washington (318)
247 images from 16 herbaria:
BLMVL (1)
CIC (10)
EWU (4)
HPSU (9)
ID (31)
IDS (7)
NOCA (19)
PLU (16)
PSM (8)
REED (4)
SOC (25)
SRP (6)
UBC (16)
WCW (7)
WTU (63)
WWB (21)