This name is a synonym of Magnolia boliviana (M.Nee) Govaerts.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 201372) with original publication details: Brittonia 46: 265 1994.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:300228-2.
This name was in version 1 of The Plant List, record kew-201372, and has not been changed.