This name is a synonym of Philadelphus calvescens (Rehder) S.M. Hwang.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50077735) with original publication details: J. Arnold Arbor. 1(3): 196–197 1920.
This name was in version 1 of The Plant List, record tro-50077735.