⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50084212, with some changes.
This name is a synonym of Penstemon laricifolius subsp. exilifolius (A. Nelson) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50084212) with original publication details: Bull. Torrey Bot. Club 28(4): 230-231 230 1901.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187382-2.