This name is a synonym of Oenothera elata Kunth.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50126019) with original publication details: Naturaliste Canad. 94(5): 654 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:172767-2.
This name was in version 1 of The Plant List, record tro-50126019.