Description from Flora of China
Sinodielsia thibetica (H. de Boissieu) Kljuykov & P. K. Mukherjee.
Plants 20–80 cm, essentially glabrous (except base of umbels sparsely strigose). Leaves ternate-2–3-pinnate; primary pinnae 5–6 pairs, finely dissected, abaxially minutely scaberulous on main veins; ultimate segments oblong-ovate, 5–15 × 2–8 mm, pinnatisect. Umbels 4–11 cm across; bracts 1, linear, or caducous; rays 8–10, 2–7 cm, unequal; umbellules 6–10 mm across; bracteoles 3–5, subulate, 3–5 mm, shorter than the pedicels; pedicels 1–4 mm, elongating to 8 mm in fruit. Petals white, occasionally flushed purplish-red, ca. 1.8 × 1 mm, base shortly clawed. Fruit ovoid-oblong, 2.5–4 × 1.5–2 mm, ribs filiform; vittae 3–4 in each furrow, 6 on commissure. Seed face deeply concave. Fl. Jun–Aug, fr. Aug–Sep.
Forests, among shrubs, riparian grasslands, rock crevices; 2000–4400(–5000) m. Qinghai, W Sichuan, E and S Xizang, Yunnan [Nepal].