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Photo: Polygonum amphibium 1.

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Gallery: 
Polygonum
Botanical name: 
Polygonum amphibium

Leaves. Perheniemi, Finland. Wild. 1999-07-05.


Polygonum amphibium L.
Engl.: amphibious bistort, longroot smartweed, water knotweed, water persicaria, water smartweed, willow-grass.
Deu.: Wasser-Knöterich.
Suom.: vesitatar.
Sven.: vattenpilört, grodpilört.
Bot. syn.: Persicaria amphibia (L.) Gray

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