Ligusticum yanyuanense Pu Fating

Plants ca. 30 cm, glabrous. Rootstock cylindrical, 3–5 × ca. 5 mm, little-branched. Basal and lower leaves petiolate; petioles 2–4 cm; sheaths ovate; blade lanceolate, 6–8 × 2–4 cm, 1-pinnate, pinnae 5–6 pairs, remote, ovate to lanceolate; prox-mal pinnae usually 2-lobed, 1–2 × 0.5–1.5 cm, margins serrate. Umbels terminal, 10–25 cm across; bracts absent; rays 6–8, stout, unequal, 10–17 cm; bracteoles 5–7, oblanceolate, unequal, ca. equal to pedicels, entire; umbellules 10–15-flowered. Calyx teeth obsolete. Petals purple, obovate, base cuneate. Stylopodium conic; styles 2–2.5 × stylopodium. Fruit oblong-ovoid, ca. 3 × 2 mm; dorsal and intermediate ribs filiform, lateral ribs narrowly winged; vittae 2 in each furrow, 4 on commissure. Seed face plane. Fl. Jun–Jul, fr. Jul–Aug.

SW Sichuan (Yanyuan).

Alpine scrub, meadows; ca. 3800 m.