⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29204339, with some changes.
This name is a synonym of Penstemon laetus subsp. roezlii (Regel) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 29204339) with original publication details: Gartenflora 21: 239 239 1872.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:323252-2.