This name is a synonym of Oenothera cheiranthifolia var. nitida (Greene) Munz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50082452) with original publication details: Man. Fl. Pl. Calif. 684 1925.
This name was in version 1 of The Plant List, record tro-50082452.