Plants 15–60(–70) cm, polycarpic. Caudex branched. Stems several, suberect, branching above, solid, terete, glabrous or minutely scabrous, branches elongate and spreading. Basal leaves many, petiolate; blade oblong, 2-pinnately dissected; pinnae 4 pairs, rather remote, shortly petiolulate; ultimate segments linear, 5–20 × 1–2 mm, margins narrowly revolute, apex acute, apiculate. Upper leaves reduced, petioles wholly sheathing. Synflorescence thyrsoid; umbels 1.5–4(–6) cm across; peduncles elongate, slender; bracts 2–3, sometimes absent, broadly lanceolate, 1.5–3 × 0.5–1.5 mm, margin scarious; rays (2–)3–6(–9), ca. 10 mm, somewhat unequal; bracteoles 5–10, linear-lanceolate, 1.3–3 × ca. 1 mm, pubescent; umbellules 12–25-flowered, capitate, flowers sessile. Calyx teeth obsolete. Petals whitish or yellow, abaxially pubescent. Stylopodium conic. Fruit ovoid, dorsally compressed, 3–6 × 2–4 mm, densely or sparsely minutely pubescent; ribs filiform, prominent, margin ribs slightly winged; vittae 3 in each furrow, 6–10(–12) on commissure. Fl. and fr. Jul–Sep.
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