思茅独活 si mao du huo

Plants to 80 cm high. Root cylindrical. Stem few-branched, hirsute. Basal leaves ternate-1–2-pinnate, ultimate segments ovate-oblong or ovate-lanceolate, 2–8 × 2–4.5 cm, sparsely hirsute abaxially or at least along the veins, margin serrate-crenate. Cauline leaves gradually reduced, 1–2-pinnate to 3-lobed. Peduncles ca. 30 cm, densely hirsute; bracts 5–6, lanceolate, apex caudate; rays 25–32, subequal, ca. 4 cm, hispidulous; bracteoles 6–10, lanceolate or linear, unequal; umbellule 20–30-flowered. Calyx teeth lanceolate. Petals white, apex mucronate, outer flowers in umbel radiant, enlarged petals deeply 2-lobed. Fruit suborbicular, 5–6 × 4–5 mm, hirtellous; vittae solitary in each furrow, 2 on commissure. Fl. Jul–Aug, fr. Sep. 2n = 44*.

Sparse forests, forest margins, thickets on streamsides, grassy slopes; 1300–2300 m. Yunnan.

This species has reputed medicinal value.