This name is a synonym of Philadelphus karwinskyanus Koehne.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50149394) with original publication details: Stand. Cycl. Hort. 5: 2582 1916.
This name was in version 1 of The Plant List, record tro-50149394, and has not been changed.