This name is a synonym of Mandevilla laxa (Ruiz & Pav.) Woodson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 65938) with original publication details: Encycl. Suppl. 2: 537 1812.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:78534-1.
This name was in version 1 of The Plant List, record kew-65938, and has not been changed.