This name is a synonym of Eschscholzia caespitosa Benth..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pacif. Railr. Rep. Parke, Bot. 4(5; 4): 64 1857.
This name was in version 1 of The Plant List, record kew-2802009.