Leaf blades mostly 10-30, 8-25 cm, distal smaller. Heads 10-100+ together. Cypselae obovoid, somewhat cucullate, 1.8-2 mm, often tuberculate, glabrous. 2n = 36. Flowering mostly summer. Desert slopes, washes, southern exposures; 900-1400 m; Ariz.; Mexico (Baja California Sur, Chihuahua, Sinaloa, Sonora).