腾冲独活 teng chong du huo

Plants 80–120 cm tall. Root cylindrical. Stem solitary, rather stout, branched above. Basal leaves 2–3-pinnate; petiole sheaths broad-ovate; primary pinnae 3–4 pairs, ultimate segments ovate, 1.5–3.2 × 1–2 cm, rachises and veins hispidulous, base cuneate or cordate, margins serrate. Cauline leaves gradually reduced upward. Peduncles 4–12 cm; bracts 1–3, lanceolate, or caducous; rays 25–30, unequal, 3–9 cm, densely hispidulous; bracteoles 6–8, lanceolate, nearly as long as or shorter than pedicels. Calyx teeth lanceolate. Petals white, outer flowers in umbel radiant, enlarged petals deeply 2-lobed. Ovary densely hispidulous. Mature fruits unknown. Fl. May–Jul.

Forests, thickets; 2000–2300 m. W Yunnan (Tengchong).

This incompletely known species is recorded only from a few collections.