Stems 30-100 cm. Leaves: basal axils ± densely tomentose, terminal lobes 15-50 mm; cauline (0-)2-5. Heads (2-)6-40. Peduncles 1-15 cm. Phyllaries 6-10 mm. Florets 15-45; corollas yellowish, 2.5-4.5 mm, throats 1.5-2.5 mm, lengths 3-5 times lobes; anthers 2.5-3 mm. Cypselae 4.5-6 mm, hairs 0.4-1 mm; pappi 0.2-1 mm. 2n = 34. Flowering May-Sep. Sands, clays, gravels; 100-300+ m; Idaho, Oreg., Wash.