Description from Flora of China
Plants 30–70 cm. Stems solitary or several, not caespitose, branched above, branches hollow, puberulous, nodes densely tomentose. Basal leaves numerous; petioles 5–10 cm, sheaths large, purplish, apex broadly auriculate, often pubescent and scarious-margined; leaf blade triangular-ovate in outline, 3–4-pinnatisect, pinnae 5–6 pairs; ultimate segments linear or obovate-cuneate, 1.5–3 × 0.8–1.2 mm. Inflorescences terminal; umbels 4–7 cm across; bracts 2–3, linear, entire or occasionally 3-lobed; rays 12–20(–30), 2–3 cm, slender, inner faces sparsely pubescent; bracteoles 6–8, linear, 3-lobed or pinnate, pubescent; umbellules 12–16-flowered. Calyx teeth conspicuous, lanceolate. Petals white, obovate. Styles short. Fruit ovoid-ellipsoid, ca. 3 × 2 mm; dorsal ribs prominent, lateral ribs narrowly winged; vittae 1–2 in each furrow, 4 on commissure. Fl. and fr. Aug–Sep.
Grassy places on mountain slopes; 3000–4200 m. SW Sichuan (Miyi, Yanyuan), NW Yunnan (Heqing, Tengchong, Weixi).