This name is a synonym of Magnolia sabahensis (Dandy ex Noot.) Figlar & Noot..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 119678) with original publication details: Blumea 31: 95 1985.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:906583-1.
This name was in version 1 of The Plant List, record kew-119678, and has not been changed.