A thorny climber. It has slender wiry stems. The stems are blackish towards the base. They are smooth and the twigs are angular. The leaves have stalks. The leaf stalk is 5-12 mm long and has wings. The leaves are 2-4 cm long and 1.5-3 cm wide. They can be larger. They are broadly oval and taper to the tip. The base is rounded and ends bluntly. The flowers are deep brown. The occur in hanging heads in the axils of leaves. The fruit is a berry. They are round but flattened and black. They are 7-10 mm across. The seeds are pale brown.