Annuals, to 70 cm. Leaves linear or pinnately lobed, 25-35 mm, lobes 5-9, linear (each with oil-gland at base). Peduncles 3-6 cm. Calyculi of 3-5 subulate bractlets 3-5 mm (eglandular). Involucres broadly campanulate to obconic, 7-8 mm. Phyllaries 8-13, narrowly to broadly oblanceolate, remaining connate in fruit. Ray florets usually 8; corollas yellow-orange; tubes 3 mm, laminae 2 × 1 mm. Disc florets 30-50; corollas pale yellow, often tipped with crimson, 4-5 mm. Cypselae 3.5-4.5 mm; pappi of 10 outer, erose scales 0.7-1 mm plus 10 inner, unequally 3-aristate scales 5-6.5 mm. 2n = 14.

Flowering fall. Wettish sites in otherwise arid areas, coarse, sandy alluvium; 1500-2600 m; Ariz., N.Mex.; Mexico (Chihuahua).