This name is a synonym of Penstemon speciosus subsp. kennedyi .
The record derives from Tropicos
(data supplied on )
which reports it as a synonym (record 50110669
) with original publication details: Proc. Biol. Soc. Wash. 17(11): 97 1904.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:187569-2
.
This name was in version 1 of The Plant List, record tro-50110669.