Penstemon diphyllus
PNW
ID
MT
OR
WA
190 specimens from 18 herbaria:
Idaho (93)
Montana (90)
Oregon (3)
Washington (4)
100 images from 14 herbaria:
BBLM (1)
BOIS (2)
CIC (6)
CIC-PYNF (4)
ID (21)
IDS (7)
MONT (18)
MONTU (26)
PLU (1)
RM (1)
SRP (8)
WCW (3)
WTU (1)
WWB (1)