This name is a synonym of Magnolia × soulangeana Soul.-Bod..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 345263) with original publication details: Arbor. Frutic. Brit. 1: 278 1838.
This name was in version 1 of The Plant List, record kew-345263.