This name is a synonym of Philadelphus subcanus Koehne.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50049977) with original publication details: J. Arnold Arbor. 11(3): 159–160 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:792289-1.
This name was in version 1 of The Plant List, record tro-50049977.