This name is a synonym of Atriplex saccaria var. cornuta (M.E.Jones) S.L.Welsh.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Proc. Calif. Acad. Sci. II, 5: 718 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:26286-2.
This name was in version 1 of The Plant List, record kew-2665184, and has not been changed.