This name is a synonym of Arctostaphylos canescens subsp. sonomensis (Eastw.) P.V.Wells.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Leafl. W. Bot. 1: 78 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:272516-2.
This name was in version 1 of The Plant List, record kew-2647374, and has not been changed.