This name is a synonym of Penstemon rupicola (Piper) Howell.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50113595) with original publication details: Bull. Torrey Bot. Club 27(7): 397–398 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:187610-2.
This name was in version 1 of The Plant List, record tro-50113595, and has not been changed.