Not an accepted name (status: unknown). The accepted name is Penstemon clevelandii var. connatus Munz & I.M.Johnst., 1923.

Penstemon clevelandii subsp. connatus (Munz & I.M.Johnst.) D.D.Keck, 1876 4% complete

No common name

Keck DD (1937) Studies in Penstemon V. The Section Peltanthera. American Midland Naturalist 18(5): 790. doi: 10.2307/2420419.

There is no corrections for Penstemon clevelandii subsp. connatus yet.