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 Sax more..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(noun.plant)
genus of ornamental mostly deciduous shrubs native to Asia and Central America; widespread in cultivation; sometimes placed in family Saxifragaceae (noun.plant)