This name is a synonym of Ammannia latifolia L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 19200309) with original publication details: Fl. N. Amer. 1: 480. 1838-1840. .
This name was in version 1 of The Plant List, record tro-19200309, and has not been changed.