⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50107912, with some changes.
This name is a synonym of Penstemon barbatus subsp. trichander (A. Gray) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50107912) with original publication details: Bull. Torrey Bot. Club 33(3): 151 151 1906.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187825-2.