⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50107887, with some changes.
This name is a synonym of Penstemon gracilis Nutt..
The record derives from Tropicos which reports it as a synonym (record 50107887) with original publication details: Proc. Amer. Acad. Arts 6: 69 69 1862.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187710-2.