Plants 15–30 cm. Stem single, slender, 1–2-branched or unbranched. Basal leaves petiolate, petioles 3–10 cm; blade ovate-triangular, ca. 1.5–4 × 1.5–3.5 cm, ternate; leaflets 3(–5); ultimate segments flabelliform or rhomboidal, ca. 1 × 1 cm, margins serrate. Cauline leaves 1–3, 1–2-ternate; ultimate segments linear, 20–50 × 1–2 mm. Umbels 1.5–2.5 cm across in flower, to 4 cm in fruit; bracts absent; rays 10–20, 1–2 cm; bracteoles 1–3, 0.5–1.8 mm; umbellules 2(–3)-flowered; pedicels 0.1–1.8 mm. Calyx teeth triangular-subulate, ca. 0.3 mm. Petals white, ca. 1.1 × 0.7 mm. Stylopodium conic; styles elongate; stylopodium plus styles ca. 0.6 mm. Fruit ovoid, 1.5–1 × 0.7–1 mm; ribs filiform; vittae 2 in each furrow, 4 on commissure. Fl. Mar–May, fr. Jun–Aug.

Forests, among shrubs, grasslands, streamsides; 1200–3400 m. S Gansu, W Hubei, Hunan, E Qinghai, S Shaanxi, W Sichuan.