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 ...
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(沢瀉 in Japanese), swamp potato, tule potato, and wapato (or wapatoo).[citation needed] Most are native to South, Central, and North America, but there are also some from Europe, Africa, and Asia.