This name is a synonym of Philadelphus purpurascens var. venustus (Koehne) S.Y. Hu.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50077587) with original publication details: Mitt. Deutsch. Dendrol. Ges. 15: 53 1906.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:792343-1.
This name was in version 1 of The Plant List, record tro-50077587, and has not been changed.