Herbs, perennial, 25-100 cm tall; stems solitary and erect or clustered and ascending, upper parts branched, rarely unbranched. Basal leaves: petiole 4-7 cm; leaf blade narrowly elliptic or oblanceolate, 10-18 × 3-4 cm, 2-pinnatisect, both surfaces green, glabrous or sparsely villous, primary lateral segments 5-14-paired; ultimate segments narrowly elliptic, broadly linear, or linear-lanceolate. Middle and distal stem leaves progressively smaller, similar; leaves below capitula pinnately divided or entire. Synflorescence an irregular flat-topped cyme. Capitula (1 or)2-5; peduncle 9-19 cm. Involucre coryliform, 10-18 mm in diam.; phyllaries in 4 rows, scarious margin dark brown, outer phyllaries narrowly lanceolate or linear-lanceolate, ca. 6 mm, middle and inner ones narrowly elliptic or oblanceolate. Ray florets white; lamina 1.4-1.6 cm, apex entire. Achenes ca. 2.5 mm. Corona 0.5-1 mm, divided from 1/2 to whole of length. Fl. and fr. Jul-Aug.
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