⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201330, with some changes.
This name is a synonym of Penstemon davidsonii var. ellipticus (J.M. Coult. & Fisher) B. Boivin.
The record derives from Tropicos which reports it as a synonym (record 29201330) with original publication details: Bot. Gaz. 18: 302 302 1893.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187374-2.