Heracleum dissectifolium K. T. Fu

The taxonomy of this and the following two species is in need of revision.

Plants 60–100 cm tall. Root cylindrical. Stem solitary, branched above. Basal leaves 2-pinnate; pinnae 3–4 pairs, lacerate-pinnatifid, ultimate segments lanceolate, abaxially sparsely puberulent, margins sharply serrate. Cauline leaves gradually reduced upward. Peduncles 7–20 cm; bracts absent; rays 30–50, unequal, 6–12(–20) cm; bracteoles few, linear; umbellules many-flowered. Calyx teeth minute. Petals white, outer flowers in umbels radiant. Fruit suborbicular, 4–6 × 4–5 mm; vittae solitary in each furrow, 2 on commissure, clavate, exceeding 1/2 length of mericarp. Seed face plane. Fl. Jul–Aug, fr. Aug–Sep.

Gansu, Sichuan.

Montane thickets, grassy slopes; 1900–3200 m.