This name is a synonym of Alternanthera flavicoma (Andersson) J.T.Howell.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1101673) with original publication details: Kongl. Svenska Vetensk. Acad. Handl. 1853: 166 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:61476-1.
This name was in version 1 of The Plant List, record tro-1101673, and has not been changed.