Plants perennial, ca. 80 cm. Root long-conic, ca. 6 × 1 cm. Stem purplish, 1-branched above. Basal and lower leaves petiolate, sheaths oblong; blade 2-ternate-pinnate, pinnae 3–4 pairs, remote; leaflets ovate or long-ovate, 1–3 × 0.5–2 cm, margin acute-serrate. Umbels ca. 10 cm across; bracts 2–3, lanceolate, 0.5–1 cm; rays 30–40, purplish, 2–5 cm, very unequal, slender; bracteoles 3–5, lanceolate; pedicels many, unequal. Calyx teeth conspicuous, triangular. Petals white, obovate, notched. Fruit suborbicular, 3–4 × ca. 3.5 mm; dorsal ribs prominent, lateral ribs winged; vittae 1 in each furrow, 2 on commissure. Fr. Sep.
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