This name is a synonym of Atriplex parishii var. subtilis (Stutz & G.L.Chu) 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: Madroño 44: 184 1997 publ. 1998.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1000559-1.
This name was in version 1 of The Plant List, record kew-2665839, and has not been changed.