⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50116273, with some changes.
This name is a synonym of Penstemon bicolor (Brandegee) Clokey & D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50116273) with original publication details: Univ. Calif. Publ. Bot. 6(12): 360 360 1916.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187635-2.