Annual, up to 60 (-70) cm tall, sparsely hairy or glabrescent herb. Leaves subsessile or shortly petiolate, lamina obovate-oblong or ovate-oblong, 1.5 – 6 cm long, 0.5 – 3 cm wide, 2-3-pinnatisect into narrowly linear, acute-acuminate, entire or 2-3-dented ultimate segments. Peduncles slender, up to 15 cm long, unthickened in fruit. Capitula solitary, radiate, sometimes discoid, 1.2 – 3 cm across. Phyllaries ovate-oblong, 3 – 4 x 1.5 – 2 mm, whitish hairy outside, narrowly scarious on margins, ± obtuse. Receptacle oblong-conical, 5 – 8 mm long, c. 3 mm wide, chaffy in the upper half, paleae linear-subulate, 2.5 – 3 mm long, persistent, bristly. Ray-florets sterile, tube glabrous, ligules white, oblong-elliptic, 5 – 14 x 3 – 6 mm, obtuse, rarely absent. Disc-florets yellow, as long as to ± longer than the paleae; corolla tube terete, glabrous, slightly inflated at the base. Cypselas subylindrical-turbinate, 1 – 1.5 mm long, light brown, obscurely 8 – 10-ribbed, tuberculate, exauriculate.