This name is a synonym of Clarkia amoena (Lehm.) A.Nelson & J.F.Macbr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50132625) with original publication details: Monogr. Onothera 266 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173297-2.
This name was in version 1 of The Plant List, record tro-50132625.