Annuals, 5-40 cm. Leaves mostly basal, mostly restricted to proximal ¹/5(-¹/3+); petiolar bases 0-2+ cm; blades oblanceolate, obovate, or spatulate, 3-6(-9) cm × 5-25 mm, mostly raggedly pinnately lobed, sometimes entire, sparsely to densely villous with jointed hairs. Peduncles 5-35 cm. Phyllaries 14-20, lanceolate to lance-attenuate, 6-12+ mm, ciliate with jointed hairs. Receptacular setae 0 or 0.3-0.8 mm. Ray florets 10-13; corollas yellow to orange, 17-22 mm. Disc florets 40-100+; corollas yellow, tubes 0.6-0.8 mm, throats campanulate, 2.8-3 mm, lobes deltate, 0.5-0.7 mm, jointed hairs to 0.3 mm. Cypselae obpyramidal, 2 mm, hairs 2 mm, inserted at bases and on angles and faces; pappi of 8-10 obovate or ovate to lanceolate, aristate or muticous scales 2-5 mm (if aristate, scarious bases 2-3.5 × 1.3-1.6 mm). 2n = 34. Flowering Mar-May. Sandy desert washes and fans; 300-1200 m; Ariz., Nev., Utah; Mexico (Sonora).