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

Bayer Code : polhy

Scientific name: Polygonum hydropiper L.


Synonym(s) of Sc. name:

Classification: Polygonaceae, Dicotyledonous

Common name: water-pepper

Synonym(s) of Common name:

Name per country: DE : Wasserpfeffer ; ES : persicaria picante ; FR : renouée poivre d' eau ; IT : poligono pepe d'acqua ; PT : pimenta-de-água ; EN : water-pepper ; NL : ; DK : bidende pileur

Biological type: Annual


Seed snapshot Seed:

.


Seedling snapshot Seedling:

- Cotyledons elliptic or ovate, rounded tip, more or less stalked.

- Leaves entire, lanceolate, more or less dentate.


Adult plant snapshot Adult plant:

- Height: 30-90 cm.

- Stem erect or ascending, branched, sometimes reddish.

- Leaves elongate-lanceolate, regularly attenuate at the base and at the tip, regularly black-dotted, with a peppery taste. Prominent veins, transparent and dotted, glandular. Ochreas nearly glabrous, long-haired.

- Flowers greenish-white, sometimes pink, in long slender spikes, interrupted, somewhat arcuate-hanging. Bracteoles naked. Perianth segments covered with glandular dots.

- Fruit : 2-3 mm, sometimes 3-angled and sometimes biconvex flattened, dull, minutely rugose.

- Plant poisonous. Seeds can be used as a substitute of pepper, the juice of flowers was used against gout.

- Risk of confusion with Polygonum lapathifolium L., Polygonum persicaria L.

- Biological type: annual.

Mistake with: Polygonum lapathifolium , Polygonum persicaria


Ecological profile (click on flags): Germany   Present     Denmark  Present     France  Present     Italy  Present    

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