This name is a synonym of Philadelphus inodorus var. laxus (Schrad. ex DC.) S.Y. Hu.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50307884) with original publication details: Prodr. 3: 206 1828.
This name was in version 1 of The Plant List, record tro-50307884.