A slender twiner, glabrous in all parts. Leaves spreading or somewhat deflexed; petiole 1/2– 3/4 in. long; blade 2 1/4–3 in. long, 1–1 3/4 in. broad, oblong to elliptic-obovate, shortly cuspidate-acuminate, rather broadly cuneate or cuneately rounded at the base. Inflorescence lateral or sublateral, consisting of a simple axis 2–3 in. long, bearing 3–4 distant sessile several-flowered racemes 1 1/2–3 lin. long scattered along it; pedicels 3–4 lin. long, slender. Sepals 2/3– 3/4 lin. long, ovate, acute, more or less slightly ciliolate. Corolla rotate, about 3 lin. in diam., white; lobes 1 1/3 lin. long, 1 lin. broad, oblong, obliquely produced on one side in the upper part, very broadly rounded and minutely fimbriate-laciniate on one side at the apex. Coronal-tubercles minute, spreading from the base of the 1/2 lin. long staminal-column, transverse, broadly rounded, fleshy, flattened above, very convex beneath, dark coloured in the dried state. Style truncate, with 5 decurved rays at its apex. Follicles 3 in. long, 1/2 in. thick, lanceolate, acuminate, winged on each side, smooth and glabrous. Seeds (unripe) elongate-ovate, winged, concavo-convex, minutely tuberculate on both sides.