This name is a synonym of Oenothera torulosa f. cruciata (S. Watson) H. Lév..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50082545) with original publication details: Fl. Francisc. 2: 216 1891.
This name was in version 1 of The Plant List, record tro-50082545.