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

Bayer Code : sonar

Scientific name: Sonchus arvensis L.

Synonym(s) of Sc. name:

Classification: Compositae, Dicotyledonous

Common name: perennial sow-thistle

Synonym(s) of Common name:

Name per country: DE : Acker-Gänsedistel ; ES : cerraja ; FR : laiteron des champs ; IT : grespino dei campi ; PT : ; EN : perennial sow-thistle ; NL : zeemelkdistel ; DK : ager-svinemælk

Biological type: Perennial with rhizomes

Seed snapshot Seed:

.

Seedling snapshotSeedling snapshot Seedling:

- Cotyledons lengthened, spoon-shaped.

- Leaves entire, ovate or deltoid, irregularly dentate.

- Plant propagates vegetatively (rhizomes....); establishment from seedling is rare.

Adult plant snapshotAdult plant snapshot Adult plant:

- Height: 30-80 cm. Plant glandular -hairy above.

- Stem erect.

- Basal leaves in rosette, notched, lobed, with downward teeth, spiny but not prickly, glabrous, pinnatisect or pinnatifid, with few and distant segments. Cauline leaves amplexicaul with short and rounded auricles.

- Flowers yellow in few heads, long-peduncled in corymb, peduncles and involucre are glandular-hispid. Plant dioecious.

- Fruits : achenes brown when ripe, longitudinal and elliptic in outline, transversely wrinkled.

- The flow of the latex from the broken stem distinguishes Sonchus spp. from other thistles; the roasted root is used as a substitute for chicory; melliferous plant.

- Biological type: perennial with rhizomes.

Ecological profile (click on flags): BeneLux   Present     Germany  Present     Denmark  Present     Spain  Present     France  Present     Great Britain  Present     Italy  Present    

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