This name is a synonym of Oenothera cespitosa subsp. marginata (Nutt. ex Hook. & Arn.) Munz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23201416) with original publication details: Bot. Beechey Voy. 342–343 1841.
This name was in version 1 of The Plant List, record tro-23201416.