This name is a synonym of Oenothera flava subsp. taraxacoides (Wooton & Standl.) W.L. Wagner.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23201362) with original publication details: Contr. U.S. Natl. Herb. 16(4): 155 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:279367-2.
This name was in version 1 of The Plant List, record tro-23201362.