⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29200167, with some changes.
This name is a synonym of Penstemon laevigatus subsp. digitalis (Nutt. ex Sims) R.W. Benn..
The record derives from Tropicos which reports it as a synonym (record 29200167) with original publication details: Bot. Mag. 52: pl. 2587 pl. 2587 1825.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187353-2.