This name is a synonym of Alternanthera halimifolia (Lam.) Standl. ex Pittier.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 1100547) with original publication details: Cours. Bot. Cult. 1: 646 1802.
This name was in version 1 of The Plant List, record tro-1100547.