⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201340, with some changes.
This name is a synonym of Penstemon glaber var. fremontii (Torr. & A. Gray) M.E. Jones.
The record derives from Tropicos which reports it as a synonym (record 29201340) with original publication details: Proc. Amer. Acad. Arts 6: 60 60 1862.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:808099-1.