Almost glabrous annual 10-100 cm. Leaves petiolate, pinnate, with up to 4 pairs of pinnae, the lower of which are lobed almost to the midrib; lobes rhombic to broadly lanceolate, entire or coarsely toothed, sparsely hairy on the veins beneath. Capitula 5-10 mm in diameter, longer than wide; outer involucral bracts shorter than inner, herbaceous, all lanceolate to oblong. Receptacular scales shorter than the achenes, linear, scarious, with dark lines. Outer achenes 8-10 mm, the inner 10-18 mm, linear, papillose, with few, short, erect setae; bristles 2-3, 2-4 mm, erecto-patent at maturity. Fields and roadsides.
Naturalized in S. & S.C. Europe .