草甸藁本 cao dian gao ben

Plants 0.8–2 m, stout. Root fusiform elongate, 20–30 × ca. 1.5 cm, woody. Stem single, erect, purplish fistular, striate, branching, base covered in fibrous remnant sheaths. Basal and lower petioles 15–30 cm; blade deltoid-ovate, ca. 30 × 20 cm, ternate-3-pinnate, primary pinnae 5–6 pairs; ultimate segments lanceolate, 20–30 × 5–10 mm, margins pinnatifid. Upper leaves reduced to bladeless sheaths. Umbels terminal, 15–20 cm across, lateral umbels smaller; bracts 6–12, linear; rays 25–35(–45), slightly unequal, 4–8(–15) cm; bracteoles 8–10, linear, entire, rarely 2–3-lobed at apex, slightly exceeding umbellules, margins pubescent. Calyx teeth obsolete. Petals white obovate, base cuneate. Styles ca. equaling stylopodium. Fruit oblong-ovoid, 4–5 × ca. 3 mm; dorsal and intermediate ribs filiform, lateral ribs narrowly winged; vittae 3–4 in each furrow, 6 on commissure. Fl. and fr. Aug–Oct.

Wooded valleys, alpine meadows; 3000–3900 m. SW Sichuan, N Yunnan.