Leaves: petioles 5-12(-45) mm; blades 3-5(-9) × 4-5(-8) cm overall, lobes 1-3 mm wide. Peduncles 3-12+ mm. Involucres 2-3+ mm. Phyllaries: outer 5 sparsely strigose or glabrous. Paleae 1-1.5 mm. Functionally staminate florets: corollas 1.5-2 mm. Cypselae 1.4-1.7 mm. 2n = 36. Flowering Jul-Sep. Disturbed sites (roadsides, washes, etc.), in sandy, gypseous, or calcareous soils; 1000-2000 m; Ariz., N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Sonora, Zacatecas).