This name is a synonym of Amaranthus graecizans subsp. silvestris (Vill.) Brenan.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Beitr. Fl. Aethiop. 176 1867.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:108455-3.
This name was in version 1 of The Plant List, record kew-2632858.