This name is a synonym of Oenothera brachycarpa var. wrightii (A. Gray) H. Lév..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50109252) with original publication details: Smithsonian Contr. Knowl. 5(6): 57 1853.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:614195-1.
This name was in version 1 of The Plant List, record tro-50109252, and has not been changed.