This name is a synonym of Magnolia kwangtungensis Merr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 344363) 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:77074654-1.
This name was in version 1 of The Plant List, record kew-344363, and has not been changed.