⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201484, with some changes.
This name is a synonym of Penstemon heterodoxus var. shastensis (D.D. Keck) N.H. Holmgren.
The record derives from Tropicos which reports it as a synonym (record 29201484) with original publication details: Amer. Midl. Naturalist 33(1): 165-166, f. 1, 10 165 1945.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:307314-2.