This name is a synonym of Hydrangea macrophylla (Thunb.) Ser..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50000608) with original publication details: J. Arnold Arbor. 7(4): 240 1926.
This name was in version 1 of The Plant List, record tro-50000608.