Definition that contains flower cluster
- hortensia deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue
- pilea pumilla a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves
- 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
- fall-blooming hydrangea deciduous shrub or small tree with pyramidal flower clusters
- snow-on-the-mountain annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk
- hydrangea macrophylla hortensis deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue
- dead nettle a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves
- osmund any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters
- wild hydrangea deciduous shrub with creamy white flower clusters; eastern United States
- ghost weed annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk