The leaves of this plant give its name away. The long slender arrow-shaped leaves extend on tall (1-5 foot) stalks and point towards the sun. Their white delicate flowers have only three petals which surround a fuzzy yellow (male plant) or mound-like green (female plant) center. Three ¾" flowers circle the stem in each whorl. You'll find them in stream and pond edges, marshes, and swamps all over North America.
Their small, potato-like tuber (near the root) provides a tasty treat for ducks and muskrats. The "Wapato," as it is called by the Native Americans, was a regular part of Native American meals and was also eaten by early voyagers like Lewis and Clark. The tuber can easily be harvested by breaking it loose from the root with bare feet. The tuber then floats right to the surface.