This name is a synonym of Atriplex tridentata Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50227928) with original publication details: Stud. Syst. Bot. Brigham Young Univ. 1: 4 1962.
This name was in version 1 of The Plant List, record tro-50227928, and has not been changed.