Perennial plant of the Daisy family -Compositae-, up to 1 m. Erect stems, reddish, growing up from spreading suckers. Alternate compound leaves, dark green. Down ones, petiolated; upper ones, sesile. Ending flat flowers, till 2 cm, without ligules, gathered in corymbs. Cultivated fields, side of the roads and uncultivated fields. It is a plant with stong unpleasant odour.