This name is a synonym of Magnolia sargentiana Rehder & E.H.Wilson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117816) with original publication details: Pl. Wilson. 1: 399 1913.
This name was in version 1 of The Plant List, record kew-117816, and has not been changed.