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

Bayer Code : senja

Scientific name: Senecio jacobaea L.

Synonym(s) of Sc. name:

Classification: Compositae, Dicotyledonous

Common name: common ragwort

Synonym(s) of Common name:

Name per country: DE : Jakobs-Geiskraut ; ES : hierba de santiago ; FR : séneçon jacobée ; IT : senecione di San Giacomo ; PT : tasna ; EN : common ragwort ; NL : jacobskruiskruid ;

Biological type: Perennial

Seed snapshot Seed:

.

Seedling snapshot Seedling:

- Cotyledons lengthened, spoon-like.

- Leaves entire, elliptic or ovate, regularly dentate.

Adult plant snapshot Adult plant snapshot Adult plant:

- Height: 50-100 cm. Plant glabrous and pubescent.

- Stem branched in the upper part.

- Leaves glabrous, oblong in outline, deeply-pinnatifid with subequal oblong-lanceolate or crenulate segments; lower leaves stalked and later sessile with clasping auricles.

- Flowers yellow, head 6-10 mm high, in terminal corymb. Involucel with few and short bracts ; involucral bracts brown-tipped.

- Fruits : when ripe involucral bracts are spreading and not reflexed. Achenes pubescent, the outer glabrous.

- Poisonous plant.

- Plant used against diarrhoea, for cataplams and gargles. Good quality of the nectar.

- Biological type: perennial.

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

Return INRA  Return INRA-Dijon  Return Weed Science & Agronomy Unit  Return HYPP-A

Copyright © 2000-2001 INRA, all rights reserved ; J.-P. Lonchamp, Nov. 2000
http://www.dijon.inra.fr/bga/hyppa/hyppa-a/senja_ah.htm ,