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Perennial herb growing from a slender rhizome with thickened, tuberlike tips. The plant grows upright 10 to 50 centimeters tall. Its stem is lined with pairs of toothed leaves with heads of flowers in their axils. The flower is white & a few millimeters in length. The root of the plant was used as a food by several Native American groups.
On a log partly submersed in shallow muddy shoreline of a beaver pond.