See text Sagittaria montevidensis is a species of flowering plant in the water-plantain family Alismataceae.

The leaves are sagitatte and glabrous, up to 28 centimetres (11 inches) long and 23 cm (9 in) wide.

Its terete, spongy petioles may reach a length of more than 0.75 metres (2+1⁄2 feet) and are up to 7.5 cm (3 in) thick.

[1] In North America, the distribution is disjunct, primarily in a wide area from West Virginia to Texas to South Dakota, but with isolated occurrences in New Brunswick, Maine, Connecticut, New York, New Jersey, California, Florida and Alabama[8] It is reportedly naturalized in Spain, Tanzania, and the Island of Java in Indonesia.

[9] It grows preferentially at the edges of ponds, in shallow and often only temporarily existing waters.