Penstemon diffusus Douglas f. albiflorus Hardin

Washington: Whatcom: Bagley Lake, Mt. Baker National Forest. Elev. 4200 ft
48.856° N, 121.687° W,
Datum: WGS84.
Steep green alpine slope. Holotype? Mazama 11: 89. 1929. Now considered a synonym of Penstemon serrulatus. Https://intermountainbiota.org/portal/collections/individual/index.php?occid=30839703. Phenology: flowering and fruiting. Holotype.

Hardin 997, Jul 30, 1928
With Edith
WS, Catalog: 50498, WS001452