Herbs, perennial, 40-120 cm tall, sparsely arachnoid pubescent. Middle stem leaves: petiole 5-20 mm; leaf blade ovate, suborbicular, or elliptic-ovate, sparsely gray arachnoid pubescent adaxially, densely arachnoid tomentose abaxially, 2-pinnatisect; segments 2 or 3 pairs; lobules lanceolate, linear, or linear-lanceolate, acute apically. Uppermost leaves and leaflike bracts ovate or elliptic-ovate, pinnatisect or 3-or 5-sect. Capitula in ± narrow panicles, ellipsoid, 1.5-2 mm in diam. Phyllaries gray arachnoid pubescent. Marginal female florets 5-10. Disk florets 8-15, bisexual. Achenes obovoid-oblong. Fl. and fr. Aug-Oct. 2n = 16, 18.
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