This name is a synonym of Mandevilla emarginata (Vell.) C.Ezcurra.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 108392) with original publication details: Prodr. 8: 481 1844.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1193103-2.
This name was in version 1 of The Plant List, record kew-108392.