This name is a synonym of Oenothera affinis Cambess..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23200369) with original publication details: Nouv. Ann. Mus. Hist. Nat. 4: 343 1835.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1084091-2.
This name was in version 1 of The Plant List, record tro-23200369.