⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50084323, with some changes.
This name is a synonym of Penstemon grinnellii var. scrophularioides (M.E. Jones) N.H. Holmgren.
The record derives from Tropicos which reports it as a synonym (record 50084323) with original publication details: Contr. W. Bot. 12: 65-66 65 1908.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187764-2.