A thorny twining shrub. Stems are 1-2 m long. They are woody. The leaves are stalked. The leaf stalks are 1-2 cm long and with narrow wings. The leaf blades are oval or sword shaped and fattened towards the base. They taper to the tip. They are 6-17 cm long by 2-8 cm wide. The flowers are small and yellow. They occur in many flowered heads. The fruit is a berry. They are green when young. This plant varies a lot.