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 29101535) with original publication details: Leafl. Philipp. Bot. 2: 473 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:791593-1.
This name was in version 1 of The Plant List, record tro-29101535, and has not been changed.