A large twining shrub or tree. It grows 10 m long. The bark is smooth and it has a yellowish-white covering. The stems have milky sap. The leaves are 5-12 cm long by 2.5 cm wide. They are sword shaped. The groups of flowers are in the axils of leaves. The flowers are white and have a scent. The fruit is 10-15 cm long by 3-5 cm wide.