It is a vine that keeps growing from year to year. It grows 1.5 m high and spreads 1.5 m wide. The plant contains milky sap. The stem is stout and twining. The leaves are fleshy and in pairs. They are oval and bright green. The flowers develop with or before the new leaves. The flowers are white with purple spots. They are tube shaped. The tubes curve and the lobes expand into a funnel shape. They unite at the tip. The fruit is a double curved pod. The seeds have white silky hairs.