(Polygonum oxyspermum raii)
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.