This name is a synonym of Ammannia latifolia L..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Index Seminum (HBG) 1823: 3 1823.
This name was in version 1 of The Plant List, record kew-2633764, and has not been changed.