Vines or climbing herbs; stems to 2 m, quadrangular, glabrous or hirtellous at nodes, scaberulous, retrorsely aculeolate, or sometimes subsmooth. Leaves in whorls of 4; petiole 0.5-2.5(-4) cm; blade drying membranous to papery, lanceolate to subovate, 1-6(-8) × 0.5-2(-4) cm, base rounded to cordate, margins usually aculeolate, apex acuminate or shortly acuminate; principal veins 3 or 5, palmate. Inflorescences thyrsoid, paniculate, with terminal and axillary, few-to many-flowered cymes, 2-3 cm; axes glabrous and smooth; pedicels 2-5 mm; bracts narrowly lanceolate, 1-5 mm. Ovary ca. 1.8 mm, glabrous. Corolla purplish red, rotate, fused basal part 0.2-0.6 mm; lobes spreading, ovate-lanceolate, 2-3(-4) mm, caudate. Mericarp berry dark blue or black, 5-9 mm in diam. Fl. May-Jun, fr. Aug-Oct.
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A climber. The stems are 2 m long. The leaves are in rings of four. They are sword shaped or oval. They are 1-6 cm long by 1-2 cm wide. There can be a few to many flowers at the ends of branches or in the axils of leaves. The fruit are bark blue to black and 5-9 mm across.
It is a subtropical plant. In Yunnan. In China it grows between 1,100-3,000 m above sea level. It grows on the edges of forests and in grasslands.
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