HYPP-A Unité de Malherbologie & Agronomie
Weed Science & Agronomy
INRA-Dijon

Bayer Code : polam

Scientific name: Polygonum amphibium L.


Synonym(s) of Sc. name:

Classification: Polygonaceae, Dicotyledonous

Common name: amphibious bistort

Synonym(s) of Common name:

Name per country: DE : Land-Wasser-Knöterich ; ES : ; FR : renouée amphibie ; IT : poligono anfibio ; PT : persicária-de-água ; EN : amphibious bistort ; NL : veenwortel, NL : watersmerte ; DK : vand-pileurt

Biological type: Perennial with rhizomes


Seed snapshot Seed:

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Seedling:

- Plant propagates overall vegetatively (rhizomes...); establishment from seedling is rare.


Adult plant snapshotAdult plant snapshotAdult plant snapshot Adult plant:

- Height: 30-100 cm.

- Stem: erect or ascending, simple or branched, glabrous or hairy with appressed hairs, rooting at nodes.

- Leaves sessile or stalked, light-green, nearly whitish beneath. Blade firm, oblong, narrowed into a petiole, prominent midvein. Petiole above the half part of the ciliate leaf sheath (ochrea ). Red rhizome.

- Flowers pink, in dense terminal spike on stem or branches, eglandular sepals. Stamens long exceeding the calyx -teeth.

- Fruit black-brown, shining, ovate and flattened.

- Plant used as diuretic. No flowering except in water.

- Biological type: perennial with rhizomes.

Mistake with: Polygonum persicaria (at seedling stage).


Ecological profile (click on flags): BeneLux   Present     Germany  Present     Denmark  Present     Spain  Rare     France  Present     Great Britain  Rare     Italy  Rare     Portugal  Present    

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