This name is a synonym of Chionanthus boutonii A.J.Scott.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 355151) with original publication details: Fl. Mauritius 219 1877.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:610735-1.
This name was in version 1 of The Plant List, record kew-355151, and has not been changed.