This name is a synonym of Deutzia floribunda Nakai.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Acta Phytotax. Geobot. 26: 7 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:883389-1.
This name was in version 1 of The Plant List, record kew-2763213, and has not been changed.