Not an accepted name (status: rejected).
The accepted name is
Penstemon xylus A.Nelson, 1902.
Penstemon tusharensis
N.H.Holmgren, 1979
4% complete
No common name
Holmgren NH (1979) Nomenclatural Changes in Some Intermountain Penstemons (Scrophulariaceae). Brittonia 31(1): 104-107. doi: 10.2307/2806680.
Synonyms
No known synonyms