Herbs, perennial, 35-50 cm tall, capitately branched, densely glandular pubescent, strongly aromatic. Lowermost and middle stem leaves: petiole 2-3 cm or more; leaf blade oblong or oblong-ovate, 3.5-6 × 1.5-4 cm, abaxially gray or yellowish arachnoid tomentose or glabrous, adaxially and abaxially on veins glandular pubescent. Lowermost leaves (2 or)3-pinnatisect; middle leaves 2(or 3)-pinnatisect; segments 5 or 6 pairs, ovate or oblong-ovate, 1.5-2.5 × 1-1.5 cm; lobules lanceolate or deeply serrate, 3-7 × 1-1.5 mm, margin revolute, acute or obtuse apically; rachis winged. Uppermost leaves and leaflike bracts 1-or 2-pinnatisect. Synflorescence a narrow panicle. Involucre oblong or broadly ovoid, 3-4 mm in diam.; phyllaries sparsely glandular pubescent. Marginal female florets 5-7. Disk florets 8-15, bisexual. Achene obovoid or oblong. Fl. and fr. Jul-Oct.
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