Plants perennial, 50–70 cm, glabrous. Root fibrous. Stem branched. Lower petioles 7–10 cm; blade ternate-2–3-pinnate; ultimate segments ovate-lanceolate or lanceolate, 10–20 × 5–10 mm, pubescent on the veins. Upper leaves smaller. Umbels 3–4.5 cm across; bracts absent; rays 20–30, 5–30 mm, extremely unequal; bracteoles 3–5, linear, 1.5–3 mm, ca. equal to or shorter than pedicels; umbellules 4–6 mm across, 10–20-flowered; pedicels 2–3 mm. Calyx teeth obsolete. Petals white, obovate, base cuneate, apex with incurved lobule. Stylopodium conic; styles ca. 2 × stylopodium, reflexed. Fruit ovoid, 2.5–3 × ca. 2 mm, base cordate, surface glabrous; vittae 3 in each furrow, 4 on commissure. Seed face plane. Fl. Jun–Jul, fr. Aug–Sep.
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