⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50107881, with some changes.
This name is a synonym of Penstemon humilis subsp. brevifolius (A. Gray) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50107881) with original publication details: New Man. Bot. Centr. Rocky Mt. 445 445 1909.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187221-2.