This name is a synonym of Magnolia sprengeri Pamp..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 252916) with original publication details: Acta Pharm. Sin. 22: 778 1987.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77062235-1.
This name was in version 1 of The Plant List, record kew-252916.