This name is a synonym of Atriplex canescens var. linearis (S.Watson) Munz.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Proc. Amer. Acad. Arts 24: 72 1889.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:309651-2.
This name was in version 1 of The Plant List, record kew-2665456, and has not been changed.