⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50289856, with some changes.
This name is a synonym of Penstemon clevelandii subsp. angelicus (I.M. Johnst.) Keck.
The record derives from Tropicos which reports it as a synonym (record 50289856) with original publication details: Proc. Calif. Acad. Sci., ser. 4, 12: 1165 1165 1924.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187269-2.