This name is a synonym of Magnolia campbellii Hook.f. & Thomson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117719) with original publication details: Notes Roy. Bot. Gard. Edinburgh 12: 211 1920.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554777-1.
This name was in version 1 of The Plant List, record kew-117719, and has not been changed.