An annual vine. It is smooth and without thorns. The stems are green and not woody. It grows 2.5 m long. The branches have long green tendrils with prickles. The leaves are oval and heart shaped. They are widest at the base. The male and female flowers are on separate vines. They are greenish white. The fruit are round and like berries. They are 8-15 mm across. The fruit occur in clusters. They are dark blue to black. There are several seeds.