Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : polam
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
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- Plant propagates overall vegetatively (rhizomes...); establishment from seedling is rare.
- 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):
Present
Present
Present
Rare
Present
Rare
Rare
Present
