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 95937) with original publication details: Trans. Hort. Soc. London 6: 71 1825.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:79227-1.
This name was in version 1 of The Plant List, record kew-95937, and has not been changed.