⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50320416, with some changes.
This name is a synonym of Penstemon labrosus (A. Gray) Hook. f..
The record derives from Tropicos which reports it as a synonym (record 50320416) with original publication details: Bot. California 1: 622 622 1876.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:318345-2.