Annuals (rarely persisting), green, to 30 cm, glabrous or sparsely hirtellous. Stems decumbent to erect. Leaves mostly alternate (sometimes opposite at 1-3 proximal nodes); blades usually lobed, 12-28 mm overall, lobes 7-15, linear to filiform, pliable (blades mostly not lobed in var. wrightii. Peduncles 30-80 mm, glabrous or hirtellous. Calyculi of 3-8 deltate to subulate bractlets, lengths less than 1/2 phyllaries. Involucres obconic, 5-7 mm. Phyllaries 12-22, margins of outer distinct less than 1/5 their lengths, abaxial faces glabrous or sparsely hirtellous. Ray florets 10-21; corollas yellow-orange, laminae 4-10 × 1.5-3 mm. Disc florets 50-100+; corollas yellow, 2.5-4.5 mm (peripheral ± zygomorphic in some plants). Cypselae 2-3.5 mm; pappi of erose and/or aristate scales 0.7-3.5 mm.