This name is a synonym of Styrax guyanensis A.DC..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 30800097) with original publication details: Publ. Field Mus. Nat. Hist., Bot. Ser. 22(3): 166 1940.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:247667-2.
This name was in version 1 of The Plant List, record tro-30800097, and has not been changed.