⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29204337, and has not been changed.
This name is a synonym of Penstemon barbatus subsp. torreyi (Benth.) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 29204337) with original publication details: Prodr. 10: 324 324 1846.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:808325-1.