泽苔草属（学名：Caldesia）是泽泻科下的一个属，为多年生、沼生草本植物。该属共有4种，分布于东半球热带地区。

Caldesia is a genus of aquatic plants. It includes three living species widespread across Europe, Asia, Africa and Australia. The genus "has an extensive Oligocene through Pleistocene fossil record in Eurasia," and has been found in fossil strata of the United States (Idaho and Vermont) as well. Ten fossil species have been described for the genus.