Penstemon
cinereus
PNW
OR
WA
58 specimens from 10 herbaria:
Oregon (5)
Washington (53)
26 images from 8 herbaria:
CIC (1)
EWU (1)
HPSU (2)
ID (1)
OSC (1)
PLU (1)
WS (16)
WTU (3)
