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 50315159) with original publication details: Proc. Amer. Acad. Arts 8: 597 1873.
This name was in version 1 of The Plant List, record tro-50315159.