Description from Flora of China
Plants stout, to 1 m. Stem hollow, fluted above especially around nodes. Petioles pubescent, broadly sheathing; leaf blade broadly triangular-ovate, 2–3-ternate, ultimate segments large, hispid on rachises and veins, especially abaxially, base cuneate, irregularly doubly serrate, terminal segments elliptic, 3–6 × 2–4 cm, lateral segments often oblique-ovate, 1.5–3.5 × 1–2.5 cm. Leaves reducing upwards. Umbels 8–12 cm across; peduncles stout; bracts absent or 1, ovate-lanceolate; rays 10–15, 1.5–5 cm, unequal, tomentose; bracteoles several, linear-lanceolate, longer than flowers; umbellules 10–18-flowered. Calyx teeth obsolete. Styles short. Petals white. Fruit ellipsoid, ca. 8 × 6 mm, glabrous; dorsal ribs prominent, rounded, lateral ribs broadly winged; vittae very large, 1 in each furrow, 2 on commissure, very large. Fl. and fr. Aug–Sep.
Forest margins, scrub; 2500–3000 m. SW Guizhou (Xingyi), NC and SW Sichuan (Lixian, Muli), NW Yunnan (Dêqên, Zhongdian).