⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29201527, with some changes.
This name is a synonym of Penstemon acaulis var. yampaensis (Penland) Neese.
The record derives from Tropicos which reports it as a synonym (record 29201527) with original publication details: Madroño 14(5): 156-159, f. 2 156 1958.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:282333-2.