Pternopetalum molle (Franch.) Hand.-Mazz.

Plants 10–35 cm. Stems 1–3, glabrescent, slender. Basal leaves petiolate, petioles 5–18 cm, glabrous; blade triangular-ovate in outline, 2–10 × 2–8 cm, 1–2-ternate; ultimate segments broad-ovate or rhomboidal, 2–5 × 1–3 cm, membranous, glabrous abaxially slightly glaucous, margins serrate or crenate. Cauline leaves 1–2. Inflorescence 1–2-branches; umbels 2–3 cm across in flower, to 6 cm in fruit; bracts absent; rays (5–)10–20, 1–3.5 cm; bracteoles 2, 0.4–0.8 mm; umbellules (1–)2(–3)-flowered; pedicels 0.3–2.5 mm. Calyx teeth subulate, ca. 0.4 mm. Petals white, ca. 2 × 0.9 mm. Stylopodium conic; styles elongate; stylopodium plus styles ca. 1.3 mm. Fruit ovoid or oblong-ovoid, 2–3 × ca. 1 mm; ribs finely scabrid or minutely denticulate; vittae 1–3 in each furrow, 4 on commissure. Fl. Apr–Jun, fr. Jul–Sep.

N and W Sichuan, N and W Yunnan.

Forests, alpine meadows, streamsides; 1400–3500 m.