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 with original publication details: Proc. Linn. Soc. London 1: 109 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60264-1.
This name was in version 1 of The Plant List, record kew-2762059.