Polygonum coccineum
Encyclopedia
Polygonum coccineum, commonly called water smartweed, is a perennial herb in the genus Polygonum
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Polygonum
Polygonum is a genus in the Polygonaceae family. Common names include knotweed, knotgrass, bistort, tear-thumb, mile-a-minute, and several others. In the Middle English glossary of herbs "Alphita" , it was known as ars-smerte. There have been various opinions about how broadly the genus should be...
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