genus Hydrangea - 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

Hydrangea anomala, climbing hydrangea - deciduous climber with aerial roots having white to creamy flowers in fairly flat heads

Hydrangea arborescens, wild hydrangea - deciduous shrub with creamy white flower clusters; eastern United States

hortensia, Hydrangea macrophylla hortensis - deciduous shrub bearing round-headed flower clusters opening green and aging to pink or blue

fall-blooming hydrangea, Hydrangea paniculata - deciduous shrub or small tree with pyramidal flower clusters

Hydrangea petiolaris, climbing hydrangea - deciduous climber with aerial roots having large flat flower heads

carpenteria, Carpenteria californica - California evergreen shrub having glossy opposite leaves and terminal clusters of a few fragrant white flowers

Decumaria barbara, Decumaria barbata, decumary - woody climber of southeastern United States having white flowers in compound terminal clusters

deutzia - any of various shrubs of the genus Deutzia having usually toothed opposite leaves and shredding bark and white or pink flowers in loose terminal clusters

bush, shrub - a low woody perennial plant usually having several major branches