Heracleum oncosepalum (Hand.-Mazz.) Pimenov & Kljuykov

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

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*.

NW Yunnan.

Alpine meadows; 3500–4300 m.

隆萼当归（学名：Angelica oncosepala）为伞形科当归属下的一个种。