This name is a synonym of Oenothera fruticosa subsp. glauca (Michx.) Straley.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50127224) with original publication details: Monogr. Onothera 107 1902.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:172983-2.
This name was in version 1 of The Plant List, record tro-50127224.