Heracleum oncosepalum (Handel-Mazzetti) Pimenov & Kljuykov.

Plants perennial, 30–60 cm. Root cylindric, brownish. Stem solitary, thinly ribbed, villous above. Petioles 8–15 cm, sheaths small, oblong; blade broad-ovate, 9–13 × 8–10 cm, ternate or ternate-pinnate; leaflets short-petiolulate, broad-ovate, 2–3-lobed, base truncate to cordate, margin irregularly coarse-crenate, apex acute, whitish sparse-villous on both surfaces. Peduncles 8–20 cm, villous; bracts 2–3, linear, scabrous, deciduous; rays 13–20, 2–4.5 cm, unequal, villous; bracteoles ca. 5, linear-lanceolate, 0.3–0.5 cm, longer or as long as umbellules; umbellules 10–20-flowered; pedicels pubescent. Calyx teeth conspicuous, triangular-ovate or ovate-lanceolate. Petals white or purplish red, obovate, notched. Fruit obovoid-orbicular, 5–6 × 4–5 mm; dorsal ribs and 2 secondary ribs slightly prominent, lateral ribs broadly thick-winged; vittae 1(–2) in each furrow, 3–4(–6) on commissure. Fl. and fr. Aug–Oct. n = 11*.

The roots have reputed medicinal value. Recent carpological research indicates that this species may be better placed in Heracleum.

Alpine meadows; 3500–4300 m. NW Yunnan.