This name is a synonym of Philadelphus zhejiangensis S.M. Hwang.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50078351) with original publication details: J. Arnold Arbor. 36: 96 1955.
This name was in version 1 of The Plant List, record tro-50078351, and has not been changed.