This name is a synonym of Alternanthera areschougii R.E.Fr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1101353) with original publication details: Pl. Itin. Eugeniae 123 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:250022-2.
This name was in version 1 of The Plant List, record tro-1101353, and has not been changed.