Flowers, with 3 or 4 or sometimes no yellow rays. Of the involucre, the outer row of scales equals the rays in length. Achenes, nearly smooth themselves, are tipped with 3 or 4 awns with hooks bent downward, by means of which they catch into everything which touches them. Leaves, 1 to 3-pinnately cut, the divisions cut or lobed, toothed.
Sometimes a weed, in damp soil, Rhode Island westward and southward.