Ray'S Knotweed (Polygonum oxyspermum raii)
Description
Polygonum oxyspermum�is green or blue-green. Annual, stems prostrate, generally run along the surface of the ground but sometimes do rise above ground level. They can be as much as 100�cm (39�in) long. Leaves are up to 35�mm (1.4�in) long. Flowers are green, white or pink, in axillary clusters.
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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