This name is a synonym of Atriplex paludosa subsp. baudinii (Moq.) Aellen.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pl. Preiss. 1: 633 1845.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:164032-1.
This name was in version 1 of The Plant List, record kew-2665600, and has not been changed.