This name is a synonym of Oenothera hartwegii subsp. fendleri (A. Gray) W.L. Wagner & Hoch.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50258687) with original publication details: Smithsonian Contr. Knowl. 5(6): 58 1853.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173040-2.
This name was in version 1 of The Plant List, record tro-50258687.