⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29203929, with some changes.
This name is a synonym of Penstemon deustus var. variabilis (Suksd.) Cronquist.
The record derives from Tropicos which reports it as a synonym (record 29203929) with original publication details: Deutsche Bot. Monatsschr. 18(10): 153-154 153 1900.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187840-2.