⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50110669, with some changes.
This name is a synonym of Penstemon speciosus subsp. kennedyi (A. Nelson) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50110669) with original publication details: Proc. Biol. Soc. Wash. 17(11): 97 97 1904.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187569-2.