Home › Contents › Amphibious Knotweed

Amphibious Knotweed

Polygonum amphibium. Buckwheat Family.

Growing in water or in mud. Leaves.--Usually floating; thick; smooth and shining above; mostly long-stemmed; somewhat oblong or lance-shaped. Flowers.--Small; bright pink, thickly clustered in a close spike. Calyx.--Five-parted; petal-like; pink. Corolla.--None. Stamens.--Five. Pistil.--One, with a two-cleft style.

This plant, as its name indicates, is found both on land and in the water, but usually it may be considered an aquatic. Its rose-colored flower-clusters tremble in the current of the stream and flush the borders of many a pond.