Herbs, perennial, 100-150 cm tall; rhizome short, thick; stem often solitary, branches many, 20-30 cm, subglabrous. Lower and middle stem leaves: petiole 2-10 mm; leaf blade elliptic-ovate, 4-9 × 2.5-4 cm, yellow or brown gland-dotted, 1-3-pinnatipartite or-sect; segments 4 or 5 pairs; lobes or lobules linear or linear-lanceolate or serrate, 5-25(-35) × 2.5-5 mm, base attenuate, margin revolute, acuminate apically; rachis narrowly winged. Uppermost leaves pinnatipartite or-sect; leaflike bracts pinnatipartite or entire. Synflorescence a broad panicle; ultimate branches with up to 8 capitula. Capitula solitary or in groups of 3 or 4, sessile. Involucre ellipsoid or oblong-campanulate, 2-3 mm in diam.; phyllaries initially puberulent, glabrescent. Marginal female florets 6-8. Disk florets 10-20, bisexual. Achenes obovoid. Fl. and fr. Aug-Oct.
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