This name is a synonym of Magnolia koordersiana (Noot.) Figlar.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 126737) with original publication details: Blumea 31: 111 1985.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:906674-1.
This name was in version 1 of The Plant List, record kew-126737, and has not been changed.