Heracleum souliei Boiss.

This incompletely known species is recorded only from a few collections. It has reputed medicinal value.

Plants to 1 m tall. Root stout. Stem branching, villous. Basal leaves 2-pinnate; ultimate segments ovate or lanceolate, terminal leaflets rhombic, base with decursive wings, apex acuminate. Cauline leaves reduced upward. Umbels 13–14 cm wide; peduncles up to 25 cm, villous; bracts absent; rays 30–35, puberulent; bracteoles few, linear; flowers more than 20 per umbellule. Calyx teeth triangular. Petals white, outer flowers in umbels radiant. Fruit obovoid, 6–7 × 4–5 mm; vittae solitary in each furrow, 2 on commissure, clavate, more than 1/2 length of mericarp. Seed face plane. Fl. Jul–Aug, fr. Aug–Sep.

W Sichuan.

Thickets, grassy slopes; 2600–3500 m.