Not an accepted name (status: unknown). The accepted name is Penstemon linarioides var. sileri A.Gray, 1878.

Penstemon linarioides subsp. sileri (A.Gray) D.D.Keck, 1878 4% complete

No common name

Bull. Torrey Bot. Club 64:374. 1937

There is no corrections for Penstemon linarioides subsp. sileri yet.