慈姑属（学名：Sagittaria）是泽泻科下的一个属，为水生草本植物。该属共有20种，分布于温带和热带地区。

Sagittaria is a genus of about 30 species of aquatic plants whose members go by a variety of common names, including arrowhead, duck potato, katniss, Omodaka (沢瀉 in Japanese), swan potato, tule potato, and wapato (or wapatoo). Most are native to South, Central, and North America, but there are also some from Europe, Africa, and Asia.