A soft slender climber. The plant contains a white latex. The leaves are opposite and each pair is at right angles to the ones above and below it. The leaves are long and sword shaped. They are dark green with light green veins. They are 3.5-8 cm long by 4-10 mm wide. The leaf stalk is 3-12 mm long. The flowers occur as 2-3 together. They are 2-3 cm wide. The flowers are bell shaped. There are 5 triangular lobes. These are hairy at the edges. The flowers are white with reddish streaks inside. The fruit are many seeded dry fruit. They are oblong and curved. They are 4-7 cm long by 1.6 cm wide. The seeds are oval and flat.
Slender vine. Stems wiry to herbaceous; brachysclereids absent. Leaves with petiole 0.5–1.3 cm long; lamina linear-lanceolate, 3–9 cm long, 3–9 mm wide, cuneate at base, acute; colleters absent. Inflorescence racemiform, of 1 or 2 fascicles. Flowers c. 7 mm long, 15–25 mm diam.; pedicels 1–2 cm long. Corolla flattened-campanulate, cream to pink, glabrous outside; lobes 5–10 mm long, c. 7 mm wide, l:w ratio 0.7–1.4. Annular corona of dense hairs present; staminal corona lobes ovate-lanceolate, with tips incurved over anthers, c. 5 mm long, 1.5 mm wide at base, cream. Follicles 4–8 cm long.