⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29204321, with some changes.
This name is a synonym of Penstemon leiophyllus var. francisci-pennellii (Crosswh.) N.H. Holmgren.
The record derives from Tropicos which reports it as a synonym (record 29204321) with original publication details: Leafl. W. Bot. 10(10): 170-171 170 1965.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:282301-2.