This name is a synonym of Magnolia dodecapetala (Lam.) Govaerts.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117571) with original publication details: Prodr. 1: 82 1824.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554699-1.
This name was in version 1 of The Plant List, record kew-117571, and has not been changed.