⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29200179, with some changes.
This name is a synonym of Penstemon australis subsp. laxiflorus (Pennell) R.W. Benn..
The record derives from Tropicos which reports it as a synonym (record 29200179) with original publication details: Acad. Nat. Sci. Philadelphia Monogr. 1: 229-232, map 52 229 1935.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187596-2.