Herbs 50–120 cm. Stem erect, much-branched, usually tinged purple. Basal leaves petiolate; blade triangular-ovate, 2–3-pinnately dissected; ultimate segments linear-lanceolate, 2–9 × 3–6 mm, distally finely serrate to incised, apex long-acuminate to caudate. Cauline leaves reduced, petioles with dilated sheaths, ultimate segments linear and small. Inflorescence copiously branched; rays 5–11, unequal, 0.5–4 cm; umbellules 7–10-flowered; pedicels filiform, unequal. Stylopodium low-conic; styles short, recurved. Fruit ellipsoid ca. 6 × 4–5 mm; dorsal ribs inconspicuous or slightly raised, lateral ribs winged, wings broad, subcorky, margin incurved. Fl. Aug–Sep, fr. Sep–Oct.
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