This name is a synonym of Magnolia insignis Wall..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117653) with original publication details: Indian J. Forest. 4: 64 1981.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:920039-1.
This name was in version 1 of The Plant List, record kew-117653, and has not been changed.