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.