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The Nepalese smartweed (Persicaria nepalensis) belongs to Polygonaceae (the Knotweed family). It is an annual herb that is distributed in various parts of Japan, the Korean Peninsula, China, Asia, and North Africa. It is also naturalized in the eastern part of the United States. It grows in slightly damp areas of the mountains and can reach 10-40 cm in height. The stems are hairless and often dark red, branching to form communities. The leaves are ovate to rhombic, with wide wings on the petioles and a wide base that embraces the stem. From August to October, racemes are borne on the tips of branches and axils, and small white to pink flowers bloom.
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