Herbs, perennial, 80-100(-140) cm tall, stems sparsely glandular but densely viscid, pubescent. Lower stem leaves: petiole 5-15 mm; leaf blade ovate or broadly ovate, 5-6 × 4-5 cm, 1(or 2)-pinnatipartite to nearly-sect; segments 2 or 3, elliptic, lobes 3-6(-8) mm wide, margin revolute, occasionally with 2 or 3 serrations. Middle stem leaves ± sessile; leaf blade ovate, ovate-elliptic, or broadly ovate, 3.5-5 × 2-4 cm, abaxially densely arachnoid tomentose with underlayer of sessile glands and coarser blunt hairs on veins, adaxially papillate-pubescent, sometimes glabrescent, glandular pubescent, pinnatipartite; segments 2 or 3 pairs, elliptic or elliptic-lanceolate, 10-20 × 3-6(-8) mm. Uppermost leaves and leaflike bracts 3-5-partite or entire, lobes ± linear. Synflorescence a narrowly conical panicle. Involucre ovoid or oblong, 1.5-2 mm in diam.; phyllaries with green midrib, densely arachnoid pubescent to glabrescent. Marginal female florets 3-5. Disk florets 8-12, bisexual. Achenes obovoid or ovoid. Fl. and fr. Aug-Oct.
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