This name is a synonym of Clarkia biloba (Durand) A.Nelson & J.F.Macbr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50114943) with original publication details: Pl. Pratten. Calif. 87 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:281519-2.
This name was in version 1 of The Plant List, record tro-50114943.