Penstemon
subserratus
PNW
ID
OR
WA
103 specimens from 11 herbaria:
Idaho (4)
Oregon (22)
Washington (77)
35 images from 9 herbaria:
CIC (2)
HPSU (6)
ID (5)
NOCA (1)
OSC (10)
SRP (2)
WS (2)
WTU (6)
WWB (1)