This name is a synonym of Hydrangea integrifolia Hayata.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50005810) with original publication details: J. Coll. Agric. Imp. Univ. Tokyo 25(19): 90, pl. 7 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:791612-1.
This name was in version 1 of The Plant List, record tro-50005810, and has not been changed.