Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : sikor
Synonym(s) of Sc. name:
Classification: Compositae, Dicotyledonous
Common name: St. Paulswort (U.S.A.)
Synonym(s) of Common name:
Name per country: DE : Siegesbeckie ; FR : herbe de Saint-paul ; IT : sigesbechia ; PT : ; EN : St. Paulswort (U.S.A.) ;
Biological type: Annual
- Cotyledons : cordiform-ovate, slightly grooved above by the central vein ; petiole conspicuous and enlarged at base.
- Leaves : opposite, ovate-lanceolate, margin with 1-2 teeth at side; blade hispid for conspicuous, white, shining, erect hairs, thicker mainly at base.
- Height : 50-200 cm.
- Stem : erect, branched, hispid for crispe hairs.
- Leaves : opposite, lanceolate-ovate, dentate along the edge, acute at apex.
- Inflorescence : groups of 3 capitula at the apex of the branches ; scales sticky with thick glandular hairs, the outer foliaceous, patent, the inner carinate; ray -florets yellow; ligules short.
- Fruit : achene black, prismatic, without pappus.
- Biological type : annual.
Ecological profile (click on flags):
Present
