Twining shrub. Leaves 1.5-4.0 mm broad, linear. Corolla lobes glabrous inside, longer than flattened or saucer-shaped united part. Style apex cushion-like, just exceeding anther tips. Flowers greenish or yellow.
Slender, somewhat woody climber to 3 m; sap milky. Leaves opposite, linear-lanceolate, to 4 mm wide, pale green. Flowers glabrous above, corona lobes shorter than anthers.