This name is a synonym of Alternanthera vestita (Andersson) J.T.Howell.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1101693) with original publication details: Kongl. Svenska Vetensk. Acad. Handl., n.s. 1853: 169 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:61541-1.
This name was in version 1 of The Plant List, record tro-1101693, and has not been changed.