Sagittaria

About

Sagittaria is a genus of about 30 species of aquatic plants whose members are referred to by the Chinook Jargon word wapato and a variety of other common names, including arrowhead, duck potato, swamp potato, tule potato, and katniss. Most are native to South, Central, and North America, but there are also some from Europe, Africa, and Asia.

Summary from Wikipedia