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 and as an illegitimate name (record 165385) with original publication details: Ann. Missouri Bot. Gard. 23: 292 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:291738-2.
This name was in version 1 of The Plant List, record kew-165385, and has not been changed.