Polygonum Or Common Knotgrass Flowers. Polygonum Aviculare Or Common Knotgrass Is A Plant Related To Buckwheat And Dock. It Is Also Called Prostrate Knotweed, Birdweed, Pigweed And Lowgrass. It Is An Annual Found In Fields And Wasteland, With White Flowers From June To March. It Is Widespread Across Many Countries In Temperate Regions, Apparently Native To Eurasia And North America, Naturalized In Temperate Parts Of The Southern Hemisphere.

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also america annual apparently aviculare birdweed buckwheat called common countries dock eurasia fields flowers found hemisphere june knotgrass knotweed lowgrass many march native naturalized north parts pigweed plant polygonum prostrate regions related southern temperate wasteland white widespread