Sticky annual or rarely perennial herb, up to 250 mm tall, erect then spreading. Leaves pinnatipartite to bipinnatipartite, lobes entire or few-toothed, glandular-hairy. Flowerheads radiate, pedunculate, at ends of branches; ray florets short, 1-3 mm long, yellow; disc florets yellow. Cypselas of ray florets straight or slightly incurved, ± conspicuously trigonous, inner angle blunt or occasionally winged, outer angles with 3-5 wing-shaped processes, of disc florets flat, winged, obovoid, 3-4 mm long.