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 95906) with original publication details: Apocyn. S. Amer. 260 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:79196-1.
This name was in version 1 of The Plant List, record kew-95906, and has not been changed.