⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50108796, with some changes.
This name is a synonym of Penstemon gracilis var. wisconsinensis (Pennell) R.W. Benn..
The record derives from Tropicos which reports it as a synonym (record 50108796) with original publication details: Scroph. E. N. Amer. 234, map 55 234 1935.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187865-2.