Plants perennial, 25–30 cm. Root long-conic, yellowish brown, 4–10 cm. Stem thinly ribbed, pubescent. Basal leaves 5–8, petioles 4–10 cm, sheaths small, ovate; blade 2-ternate-pinnate, pinnae 2–3 pairs; leaflets sessile, broad-ovate to long-ovate, 3–5.5 × 1–2.5 cm, margin serrate, apex acute. Umbels ca. 15 cm across; bracts absent or 1, entire, rays 25–30, 3–7 cm, unequal; bracteoles 5–15, lanceolate, much longer than umbellules, pinnate, rarely 3-lobed or entire; pedicels many, 2–15 mm, unequal. Calyx teeth subulate. Petals white, obovate. Fruit broad-ellipsoid, 3–4 × ca. 3 mm; dorsal ribs prominent, lateral ribs winged, nearly as wide as the body; vittae 1 in each furrow, 2 on commissure. Fr. Oct.
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