This name is a synonym of Magnolia tripetala (L.) L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117872) with original publication details: Nomencl. Bot. ed. 2, 2: 90 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554870-1.
This name was in version 1 of The Plant List, record kew-117872, and has not been changed.