This name is a synonym of Cestrum elegans (Brongn. ex Neumann) Schltdl..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29602125) with original publication details: Bull. Acad. de Brux. 22: 143 1845.
This name was in version 1 of The Plant List, record tro-29602125, and has not been changed.