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 50327474) with original publication details: Leafl. Philipp. Bot. 8: 2825 1915.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:791569-1.
This name was in version 1 of The Plant List, record tro-50327474, and has not been changed.