1. type genus of Hydrangeaceae; large genus of shrubs and some trees and vines with white or pink or blue flower clusters; sometimes placed in family Saxifragaceae;
WordNet (r) 3.0 (2006):
genus Hydrangea
n 1: type genus of Hydrangeaceae; large genus of shrubs and some
trees and vines with white or pink or blue flower clusters;
sometimes placed in family Saxifragaceae