Scrambling a much branched perennial herb. Stem 4-angled, smooth. Leaves always 4 in each whorl, 10-25 (-30) x 2-5 mm, ± smooth, obovate-oblong, cuspidate at apex, only margins sometimes minutely scabrous otherwise glabrous and membranous. Inflorescence of many-flowered axillary and terminal cymes; branches stiff, divaricate; pedicels 1-1.5 mm long, recurved and enlarged in fruit Corolla yellow, c. 3.5 mm diem. lobes ovate, acuminate. Ovary glabrous. Fruit glabrous or granulate, c. 2 mm in diameter.