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 117811) with original publication details: Magnolias 213 1927.
This name was in version 1 of The Plant List, record kew-117811, and has not been changed.