Arrowhead has arrow shaped leaves 2 inches long that are similar to pickerel weed in the shape and venation except for the very pronounced backward pointing lobes or barbs which give the plant its name. There are white flowers in rings of three on the stem, each containing three white petals. These flowers are nearly ¾ inches wide. This plant produces starchy, edible tubers (eaten by Native Americans) that float on the surface of the water when mud is disturbed. Another name for Arrowhead is Duck Potato because it is a favorite of ducks and muskrats. Arrowhead blooms from July to September and lives in wet sites or shallow water along lake, stream, and pond margins, marshes, and swamps.