This name is a synonym of Oenothera pallida subsp. gypsophila (Eastw.) Munz & W.M. Klein.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50126359) with original publication details: Amer. J. Bot. 18(5): 324 1931.
This name was in version 1 of The Plant List, record tro-50126359.