This name is a synonym of Magnolia ernestii subsp. szechuanica (Dandy) Sima & Figlar.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 126818) with original publication details: Acta Bot. Yunnan. 19: 137 1998.
This name was in version 1 of The Plant List, record kew-126818, and has not been changed.