This name is a synonym of Magnolia stellata (Siebold & Zucc.) Maxim..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117834) with original publication details: Acta Phytotax. Sin. 27: 79 1989.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:936893-1.
This name was in version 1 of The Plant List, record kew-117834.