This name is a synonym of Magnolia ventii (N.V.Tiep) V.S.Kumar.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 344366) with original publication details: Kew Bull. 61: 184 2006.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77074658-1.
This name was in version 1 of The Plant List, record kew-344366, and has not been changed.