Photo: Polygonum aviculare 1.

Flowering branches. MTT Karila research station, Mikkeli, Finland. Planted. 2001-08-13.
Polygonum aviculare L. Engl.: prostrate knotweed, knotgrass, knotweed. Deu.: Vogelknöterich, Knotenwegerich, Wegtritt. Suom.: pihatatar. Sven.: trampört, trampgräs. TCM: bian xu
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Photo: Polygonum aviculare 1.