Lianas. Stem angulate, glabrous. Leaves 3-foliolate; peti- ole 4-5 cm; leaflets: petiolules 0.5-1.2 cm, adaxially yellow-brown pubescent on midvein; blade blackish on both surfaces when dry, lanceolate to broadly lanceolate, 6-8 × 2-2.5 cm, thickly papery, abaxially yellow-brown villous at leaf axils, adaxially slightly nitid and glabrous, lateral veins 3- or 4-paired, very conspicuous abaxially, slightly conspicuous adaxially, base cuneate to broadly cuneate, apex caudate-acuminate, acumen 1-1.2 cm. Cymose panicles axillary or terminal, robust, shorter than leaves, densely yellow-brown pubescent; rachis 3-4 cm. Flowers green. Outer tepals oblong, 6-7 mm, 5-veined. Inner tepals similar to outer ones but shorter, 3-veined. Stamens 4.5-5 mm; filaments straight in bud; appendages small, solid. Ovary densely yellow-brown pubescent, tetragonous; style 3-4 mm, densely yellow-brown villous. Interstaminal glands 5, small. Fruit unknown. Fl. May.

● Sparse roadside forests on mountain slopes; 400-800 m. S Guizhou (Luodian).