Herbs, perennial, 20-50 cm tall, with thick rhizomes. Lower leaves ovate-oblong or oblong, 10-15 × 2-3 cm, 2-pinnatisect; segments 3 or 4 pairs; lobules linear-lanceolate, linear, or falcate, 10-15 × 1-2 mm. Middle stem leaves: petiole 5-7 cm; leaf blade oblong-ovate, 1-or 2-pinnatisect; segments 3(or 4) pairs. Uppermost leaves and leaflike bracts pinnatisect, 3-sect, or entire. Synflorescence a long, narrow panicle. Capitula sessile to shortly pedunculate toward base. Involucre broadly ovoid, 3-4 mm in diam. Marginal female florets 10-15. Disk florets 25-30, male. Achenes obovoid. Fl. and fr. Aug-Oct. 2n = 36.
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