Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : epihi
Synonym(s) of Sc. name:
Classification: Onagraceae, Dicotyledonous
Common name: great willowherb
Synonym(s) of Common name:
Name per country: DE : Zottiges Weidenröschen ; ES : hierba de san antonio ; FR : épilobe hirsute ; IT : garofanino d'acqua ; PT : erva-dos-estolhos ; EN : great willowherb ;
Biological type: Perennial with rhizomes
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- Plant mostly propagates vegetatively (rhizomes...); establishment from seedling is rare.
- Height: 50-130 cm. Plant stiffly hairy.
- Stem erect, stiff, mostly branched, slightly angular at the base, terete above with spreading hairs. Rhizome more or less superficial.
- Leaves opposite in the lower part, with simple and glandular hairs or nearly glabrous, sessile. Leaves oblong lanceolate, toothed, semi-amplexicaule.
- Flowers pink-crimson, large (2 cm), with a long inferior ovary, stigma with 4-crossed lobes.
- Fruit : capsule pubescent. Seeds long-haired.
- Plant very noxious because its abundence in canals, drainage channels and water ditches. Plant melliferous. Plant used as a substitute of cotton for the long hairs of the pappus but unsuccessfully. Rare in crops.
- Biological type: Perennial with rhizomes.
Ecological profile (click on flags):
Rare
Rare
Present
