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 50000617) with original publication details: Acta Phytotax. Sin. 25(5): 410–411, pl. 1 1987.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:933229-1.
This name was in version 1 of The Plant List, record tro-50000617, and has not been changed.