This name is a synonym of Chionanthus thorelii (Gagnep.) P.S.Green.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50202639) with original publication details: Fl. Siam. Enum. ii: 415 1939.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:610355-1.
This name was in version 1 of The Plant List, record tro-50202639, and has not been changed.