This name is a synonym of Philadelphus purpurascens (Koehne) Rehder.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50078318) with original publication details: Pl. Wilson. 1(1): 6 1911.
This name was in version 1 of The Plant List, record tro-50078318.