This name is a synonym of Penstemon bicolor .
The record derives from Tropicos
(data supplied on )
which reports it as a synonym (record 50116272
) with original publication details: Amer. Midl. Naturalist 18(5): 806 1937.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:187702-2
.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Penstemon pseudospectabilis in version 1 of The Plant List.