This name is a synonym of Magnolia sellowiana (A.St.-Hil.) Govaerts.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117819) with original publication details: Syst. Veg. 4(2): 216 1827.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554835-1.
This name was in version 1 of The Plant List, record kew-117819, and has not been changed.