This name is a synonym of Magnolia doltsopa (Buch.-Ham. ex DC.) Figlar.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 184196) with original publication details: Revis. Gen. Pl. 6 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:555055-1.
This name was in version 1 of The Plant List, record kew-184196, and has not been changed.