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 50095298) with original publication details: Acta Bot. Austro Sin. 7: 11 1991.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:965596-1.
This name was in version 1 of The Plant List, record tro-50095298.