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 126816) with original publication details: Bull. Misc. Inform. Kew 1929: 222 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:555039-1.
This name was in version 1 of The Plant List, record kew-126816, and has not been changed.