Rupturewort (Polygonum plebejum)
Description
Polygonum�is a�genus�of about 220 species of�flowering plant�in the buckwheat and knotweed family�Polygonaceae. Common names include�knotweed,�knotgrass,�bistort,�tearthumb,�mile-a-minute,�smartweed�and several others. In the�Middle English�glossary�of�herbsAlphita�(c.�1400�1425), it was known as�ars-smerte.�There have been various opinions about how broadly the genus should be defined. For example,�buckwheat�(Fagopyrum esculentum) has sometimes been included in the genus as�Polygonum fagopyrum.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Caryophyllales
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Family: Polygonaceae
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Genus: Polygonum
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