This name is a synonym of Alternanthera ficoidea (L.) Sm..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Mem. Reale Accad. Sci. Torino 33: 131 1829.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:59347-1.
This name was in version 1 of The Plant List, record kew-2631452.