⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50113591, with some changes.
This name is a synonym of Penstemon gairdneri subsp. hians (Piper) D.D. Keck.
The record derives from Tropicos which reports it as a synonym (record 50113591) with original publication details: Bull. Torrey Bot. Club 27(7): 396-397 396 1900.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187414-2.