This name is a synonym of Plagiobothrys tenuifolius I.M.Johnst..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Proc. Amer. Acad. Arts 20: 267 1885.
This name was in version 1 of The Plant List, record kew-2797948.