This name is a synonym of Atriplex subcordata Kitag..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Enum. Pl. Jap. 1: 387 1875.
This name was in version 1 of The Plant List, record kew-2665461, and has not been changed.