This name is a synonym of Philadelphus brachybotrys (Koehne) Koehne.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50078314) with original publication details: Mitt. Deutsch. Dendrol. Ges. 13: 84 1904.
This name was in version 1 of The Plant List, record tro-50078314, and has not been changed.