This name is a synonym of Magnolia championii Benth..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117755) with original publication details: J. Bot. 68: 206 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554793-1.
This name was in version 1 of The Plant List, record kew-117755.