This name is a synonym of Oenothera hartwegii subsp. filifolia (Eastw.) W.L. Wagner & Hoch.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50118153) with original publication details: Proc. Calif. Acad. Sci., ser. 3, 1(2): 72–73, pl. 6, f. 1 1897.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173509-2.
This name was in version 1 of The Plant List, record tro-50118153.