This name is a synonym of Oenothera hookeri var. irrigua (Wooton & Standl.) R.R. Gates.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50109418) with original publication details: Contr. U.S. Natl. Herb. 16(4): 155 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173107-2.
This name was in version 1 of The Plant List, record tro-50109418.