水柳属（学名：Homonoia）是大戟科下的一个属，为灌木或小乔木植物。该属共有约5种，分布于印度、马来西亚。

Homonoia (Greek:Ὁμόνοια) is the concept of order and unity, being of one mind together or union of hearts. It was used by the Greeks to create unity in the politics of classical Greece. It saw widespread use when Alexander the Great adopted its principles to govern his vast Empire.