This name is a synonym of Atriplex patula subsp. austroafricana Aellen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 7200442) with original publication details: Engl. Bot. (ed. 3a) 8: 29, t. 702 .
This name was in version 1 of The Plant List, record tro-7200442.