Herbs, perennial, 80-150 cm tall, yellowish or gray arachnoid tomentose, later sparsely tomentose or glabrescent. Lower and middle stem leaves: petiole 0.5-1.5 cm; leaf blade elliptic, oblong, or ovate-elliptic, 6-8(-10) × 4-6 cm, abaxially densely arachnoid tomentose, adaxially sparsely arachnoid tomentose and gland-dotted, 2-pinnatisect; segments 4-6 pairs, 2.5-3.5 × 1.5-2.5 cm; lobules 3-5 pairs, rachis narrowly winged, deeply serrate, apex obtuse or rounded. Uppermost leaves ovate, 1-or 2-pinnatipartite, 3-5-partite, or entire; bracts minute, linear or linear-lanceolate. Synflorescence a lax, much-branched, broad panicle. Involucre oblong or subovoid, 3-3.5 mm in diam.; phyllaries arachnoid tomentose. Marginal female florets 10-15. Disk florets 15-25, bisexual. Achenes obovoid or ellipsoid-obovoid. Fl. and fr. Jul-Oct.
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