Annuals, 10-70 cm (± succulent; taprooted). Stems 1, erect, branched dichotomously, divaricate (drying brittle). Leaves mostly cauline; opposite; obscurely petiolate; blades 1(-2)-pedately or -pinnately lobed (lobes filiform), ultimate margins entire, faces glabrous. Heads radiate, borne singly or (2-4) in cymiform arrays. Calyculi of (0-)1-3+ erect, linear to subulate, herbaceous bractlets. Involucres cylindric to obconic, 1.5-3 mm diam. (larger in fruit). Phyllaries persistent, 3-6 in 1(-2) series, lance-ovate to lanceolate, scarious, brown-nerved. Receptacles slightly convex, paleate; paleae linear to subulate, scarious. Ray florets 3-6, pistillate, fertile; corollas yellow. Disc florets 3-4+, functionally staminate; corollas yellow, tubes shorter than throats, lobes 5, triangular. Cypselae obcompressed, oblong to linear, ± ribbed, smooth or tuberculate, glabrous or densely papillate; pappi persistent, of 2 spreading to recurved, smooth or proximally papillate awns. x = 10.