Perennials, 10-20(-30) cm across. Stems mostly prostrate (much branched, often forming mats), ± strigoso-sericeous to villous. Leaves sessile; blades oblong, 1-3(-5) cm, 2-3-pinnately lobed. Involucres 4-6 × 7-10+ mm. Phyllaries: margins and apices greenish or lacking pigment, abaxial faces ± villous. Paleae 3-4+ mm, margins greenish or lacking pigment. Ray florets usually 13-21+, rarely 0; laminae 7-10+ mm. Disc corollas 2-3 mm. Cypselae 1-1.5 mm. 2n = 18. Flowering Jul-Aug. Disturbed sites; 10-300 m; introduced; Calif., Conn., Del., Ill., Ind., Md., N.J., N.Y., N.C., Ohio, Wis.; Europe.