This name is a synonym of Magnolia salicifolia (Siebold & Zucc.) Maxim..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 343070) with original publication details: J. Soc. Forest. 15: 1100 1933.
This name was in version 1 of The Plant List, record kew-343070, and has not been changed.