Glandular-pubescent to glabrescent annual, 200-700 mm tall. Leaves alternate, oblong to oblanceolate, margin ± sinuous to sinuate-dentate, lower ones petiolate, upper ones sessile, auriculate and half clasping at base. Flowerheads radiate, corymbose, terminal; involucral bracts with white scarious margins; ray florets 2-3 times longer than involucre, orange; disc florets violet or purple. Cypselas 7-8 mm long, triangular, 3-winged, with 1 apical window.