This name is a synonym of Oenothera grisea (Bartlett) Rostanski.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23201420) with original publication details: Rhodora 16(182): 36–37, pl. 107–108 1914.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:281555-2.
This name was in version 1 of The Plant List, record tro-23201420.