⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201314, with some changes.
This name is a synonym of Penstemon laevigatus var. deamii (Pennell) R.W. Benn..
The record derives from Tropicos which reports it as a synonym (record 29201314) with original publication details: Acad. Nat. Sci. Philadelphia Monogr. 1: 212-213, map 43 212 1935.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187334-2.