This name is a synonym of Penstemon eriantherus subsp. saliens (Rydb.) Pennell.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50107905) with original publication details: Mem. New York Bot. Gard. 1: 344–345 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:187755-2.
This name was in version 1 of The Plant List, record tro-50107905.