⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50080354, with some changes.
This name is a synonym of Penstemon newberryi var. berryi (Eastw.) N.H. Holmgren.
The record derives from Tropicos which reports it as a synonym (record 50080354) with original publication details: Bull. Torrey Bot. Club 32(4): 209-210 209 1905.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187207-2.