This name is a synonym of Atriplex confertifolia (Torr. & Frém.) S.Watson.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Fl. Rocky Mts. 248 1917.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:26478-2.
This name was in version 1 of The Plant List, record kew-2665832, and has not been changed.