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 50000614) with original publication details: Repert. Spec. Nov. Regni Veg. 8(173–175): 282 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:791674-1.
This name was in version 1 of The Plant List, record tro-50000614, and has not been changed.