Plants perennial, 0.6–1.8 m. Root cylindric, yellowish brown, 7–15 × 0.6–1.2 cm. Stem purple-green, scabrous above. Petioles up to 22 cm, sheaths purple, 4–7 cm, narrow-oblong; blade triangular-ovate, 10–14 × 8–15 cm, 2-pinnate; leaflets oblong to oblong-lanceolate, 3–5 × 1.5–3 cm; terminal leaflet base decurrent; basal leaflets 2–3-lobed, margin brown-cuspidate-serrate, apex obtuse-acute, pubescent along nerves. Umbels 4–10 cm across; bracts 2–3, narrow-lanceolate or linear, ciliate, margin purplish; rays 20–60, 2–5.5 cm, unequal, densely pubescent; bracteoles 5–7, similar to bracts; umbellules 16–22-flowered. Calyx teeth obsolete. Petals white, ovate. Fruit suborbicular, 4–5 × 3–4 mm; dorsal ribs filiform, lateral ribs winged, wings narrower than the body; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Aug, fr. Aug–Sep.
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