Ostericum grosseserratum (Maxim.) Kitag.

All parts of the species contain aromatic oil and the roots have reputed medicinal value. In some regions they are used as asubstitute for the traditional Chinese medicine “du huo” (see Angelica biserrata).

Plants 80–120 cm. Root cylindric, brown, simple or branched. Stem thinly ribbed, base purplish green, branched above. Basal and lower petioles 4–18 cm, sheaths narrow-ovate, white-membranous-margined; leaf blade broadly triangular-ovate, 2–3-ternate-pinnate, primary and secondary pinnae petiolulate; leaflets subsessile, broad-ovate to rhombic-ovate, 2–5 × 1.5–3 cm, base cuneate, margin 2–4-lobed, coarsely white-mucronate-toothed, apex acute to long-acuminate, hispidulous along nerves on both surfaces. Umbels 2–10 cm across; bracts 4–8, linear-lanceolate to lanceolate, 5–8 mm; rays 6–14, 1.5–3 cm, unequal, scabrous; bracteoles 5–10, subulate to linear-lanceolate. Calyx teeth triangular-ovate, acute. Petals white, obovate, base clawed. Fruit broad-ellipsoid, 4–6 × 4–5.5 mm; dorsal ribs prominent, lateral ribs broad-winged; vittae 1 in each furrow, 2 on commissure. Fl. Jul–Sep, fr. Aug–Oct. n = 9*.

Anhui, Fujian, Hebei, Henan, Jiangsu, Jilin, Liaoning, Qinghai, Shaanxi, Shanxi, Sichuan, Zhejiang [Korea, Mongolia].

Grassy slopes, meadows, stream banks; 300–2400 m.