This name is a synonym of Magnolia gigantifolia (Miq.) Noot..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 201424) with original publication details: Atti Reale Accad. Fisiocrit. Siena X, 1: 192 1926.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:895819-1.
This name was in version 1 of The Plant List, record kew-201424, and has not been changed.