This name is a synonym of Arbutus arizonica (A.Gray) Sarg..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Syn. Fl. N. Amer. ed. 2, 2(1 Suppl.): 396 1886.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17569-2.
This name was in version 1 of The Plant List, record kew-2646757, and has not been changed.