This name is a synonym of Philadelphus kansuensis (Rehder) S.Y. Hu.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 29102359) with original publication details: J. Arnold Arbor. 9(2–3): 49–50 1928.
This name was in version 1 of The Plant List, record tro-29102359, and has not been changed.