This name is a synonym of Styrax oblongus (Ruiz & Pav.) A. DC..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 30800091) with original publication details: Syn. Pl. 1: 467 1805.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:827366-1.
This name was in version 1 of The Plant List, record tro-30800091, and has not been changed.