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Polygonum arenastrum (Oval Leaf Knotweed) is a species of annual herb in the family Polygonaceae. They have a self-supporting growth form. They have simple, broad leaves. Individuals can grow to 0.16 m.

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EOL has data for 15 attributes, including:

Known occurrences, collected specimens and observations of oval-leaf knotweed. View this species on GBIF