This name is a synonym of Alternanthera mexicana Moq..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Repert. Spec. Nov. Regni Veg. 35: 301 1934.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:10399-2.
This name was in version 1 of The Plant List, record kew-2631288, and has not been changed.