This name is a synonym of Prestonia quinquangularis (Jacq.) Spreng..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 202261) with original publication details: Apocyn. S. Amer. 211 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:82409-1.
This name was in version 1 of The Plant List, record kew-202261, and has not been changed.