Native to North America, and found from the Midwest to the Pacific Coast and south into Mexico.
An aquatic perennial plant found commonly in wet locations, such as roadside drainage ditches, irrigation ditches and streams, as well as swampy marshes and ponds. Reproduction is from seeds as well as propagation by rhizomes that terminate in globe-shaped bulbs.
Mature plants may be as tall as 2 feet or more in shaded locations, usually with the roots in water or very wet soils. Long, fleshy stalks arise from the base to develop the large, arrowhead shaped leaves, and the leaves are up to 12 inches long and very narrow, distinguishing them from California Arrowhead.
The leaf stalks are usually shorter than the flower stalks, which also arise from the base but are without leaves. Several branches arise from the main stalk, and several whorls of flowers occur along these branches, each flower composed of 3 large white petals above 3 large green bracts. The flower stalks begin to curve downward as the fruit matures, and the fruit or seed pods are very large, green, smooth balls.
Characteristicts Important to Control:
If physical removal is attempted all below-ground parts must be removed, as the plant grows from rhizomes.