Lianas. Stem purple-brown, glabrous. Leaves 3-foliolate; petiole usually much longer than leaflets; leaflets: petiolules 5-10 mm; blade ovate to ovate-elliptic, 9-11 × 4-6 cm, papery, both surfaces glabrous except adaxially minutely pubescent on midvein, lateral veins 4- or 5-paired, conspicuous on both surfaces, base rounded, apex shortly acuminate or mucronate. Cymose panicles axillary, short, ca. 5 cm, slender, glabrous; bracts ovate, ca. 1 mm. Flowers red, glabrous throughout; flower buds red, globose, glabrous throughout. Outer tepals ovate-elliptic, 3.5-4 × ca. 2.5 mm, densely pellucid-glandular. Inner tepals similar to outer ones but narrower. Stamens 1-1.5 mm; appendages minute, nearly inconspicuous. Ovary glabrous; style ca. as long as stamens. Interstaminal glands absent. Fruit unknown. Fl. Jun.

● Dense forests on mountain slopes; 700-800 m. W Yunnan (Cangyuan).