This name is a synonym of Sericocarpus oregonensis subsp. californicus (Durand) Ferris.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A6517F8A-2324-43CE-B48F-3797FE62C11F) with original publication details: Aliso 4 105 1958.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23872-2.
This name was in version 1 of The Plant List, record gcc-30042, and has not been changed.