⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201520, with some changes.
This name is a synonym of Penstemon glaber var. wardii (A. Gray) M.E. Jones.
The record derives from Tropicos which reports it as a synonym (record 29201520) with original publication details: Proc. Amer. Acad. Arts 12: 82 82 1876.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:808346-1.