Herbs, perennial, 150 cm tall or more, much branched, densely glandular pubescent. Lower and middle stem leaves: petiole 5-15 mm; leaf blade oblong or elliptic, 4-8(-9) × 3-4.5 cm, abaxially gray arachnoid pubescent, glandular pubescent on veins, adaxially glandular pubescent, 2-pinnatisect; segments 4 or 5 pairs; lobules 1 or 2 pairs, distal lobules longer, linear or linear-lanceolate, 15-25 × 1.5-2.5 mm; rachis winged. Uppermost leaves and leaflike bracts 1-or 2-pinnatisect, 3-lobed, or entire. Synflorescence a broad, much-branched panicle. Involucre oblong-ovoid or oblong-campanulate, 1.5-2.5 mm in diam.; phyllaries sparsely puberulent or ± glabrous. Marginal female florets 3-5. Disk florets 4-8, bisexual. Achenes oblong. Fl. and fr. Aug-Oct.
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