Penstemon angustifolius var. venosus (D.D.Keck) N.H.Holmgren, 1979 20% complete

No common name

Holmgren NH (1979) Nomenclatural Changes in Some Intermountain Penstemons (Scrophulariaceae). Brittonia 31(1): 104-107. doi: 10.2307/2806680.