Shrub, climbing by means of unbranched tendrils; branches ribbed, smooth, younger parts slightly hairy. Leaves lanceolate, 2.5-6(-7) x 1-2.5 cm, petiole 3-5 mm long; stipules minute, dark brown. Inflorescence 3-9-flowered, axillary umbellate cymes with 1-3 cm long peduncle, pedicel 3-6 mm long, filiform. Calyx lobes c. 2 x 6 mm, acuminate, keeled within, hypanthium c. 2 mm long. Petals c. 2.5 x 2 mm, more or less spathulate, folded around and enveloping the filament. Disc glabrous; margin thin, free, unlobed. Stamen c. 3 mm long, anthers c. 1 mm long. Styles 3, c. 1.5 mm long with some what recurved stigmas. Fruit capsular 5-7 mm in diameter, splitting into 3 cocci. Seeds plano-convex, shining, dark brown, 5 x 4 mm.