Plants 20–30(–60) cm. Stems slender, profusely branched, caespitose. Basal leaves petiolate, petioles 1.5–7 cm; blade ovate-triangular in outline, 2.5–6 × 2–5 cm, 1–2-ternate; ultimate segments ovate, ca. 1 × 1 cm, or linear-lanceolate, 2–4 × 0.3–0.5 cm. Cauline leaves ternate; ultimate segments elongate-linear, 30–70 × 3–5 mm. Umbels numerous, 2–3 cm across in flower, to 4 cm in fruit, terminal on stem and branches; bracts absent; rays 5–20, 2–4 cm, pubescent; bracteoles 2–3; umbellules 2–3-flowered. Calyx teeth minute, subulate, ca. 0.3 mm. Petals white. Stylopodium low-conic; styles ca. equaling calyx teeth, suberect to slightly reflexed. Fruit ovoid, 2–3 × 1.5–2 mm; ribs filiform; vittae 1–3 in each furrow, 2–4 on commissure. Fl. May–Jul, fr. Aug–Oct.

Forests, forest margins, grasslands; 2300–3600 m. Gansu, Shaanxi, W Sichuan, E Xizang.