Scrambling perennial herb; stems glabrous, ribbed. Lvs glabrous or with short hairs on rachis and petiole and sometimes on mid-veins of leaflets; leaflets shortly petiolulate, ± oblong, truncate and mucronate, in (5)-7-12 ± opposite pairs, 6-20 mm long; stipules subulate, entire, free. Umbels (5)-10-20-flowered; bracts 0; bracteoles subtending fls entire, c. 1 mm long; peduncles > lvs. Calyx glabrous; calyx teeth triangular, much < tube. Corolla light purplish pink, (6)-8-15 mm long. Pod glabrous, oblong, ± straight, tetragonous, (15)-20-60-(80) mm long, with (1)-3-8-(12), 1-seeded segments; seeds smooth, brown, c. 3-4 mm long.