This name is a synonym of Hydrangea paniculata Siebold.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50078472) with original publication details: Bull. Acad. Int. Géogr. Bot. 12: 115 1903.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:791618-1.
This name was in version 1 of The Plant List, record tro-50078472, and has not been changed.