This name is a synonym of Clarkia purpurea (Curtis) A.Nelson & J.F.Macbr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50290034) with original publication details: Proc. Calif. Acad. Sci. 5(1): 45–46 1873.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317283-2.
This name was in version 1 of The Plant List, record tro-50290034.