This name is a synonym of Alternanthera pungens Kunth.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name with original publication details: Cat. Hist. Nat. Corrientes 79 1897.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:59293-1.
This name was in version 1 of The Plant List, record kew-2631380.