Perennials, 15-80(-100+) cm; herbage silvery, hairs fine, ± appressed. Leaves: petioles winged, wings merging with blades; blades rhombic or widely elliptic, 4-10 × 2-8 cm. Peduncles 30-100 cm. Involucres 18-30 mm. Phyllaries in 4-6 series, lanceolate to ovate, apices acuminate. Ray florets 20-35; corollas light yellow, laminae 30-50 mm (1.5-2 times disc diams.). Cypselae ± 10 × 6.5 mm, glabrous or puberulent; pappi of 2 awns ± 1 mm (plus minute scales). 2n = 36.

Flowering Apr-Jun. Stony hillsides, canyons; 400-1300 m; Calif.