This name is a synonym of Penstemon caespitosus var. desertipicti (A. Nelson) N.H. Holmgren.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29204295) with original publication details: Univ. Wyoming Publ. Sci., Bot. 1(5): 130–131 1926.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:187340-2.
This name was in version 1 of The Plant List, record tro-29204295.