A spreading shrub or small tree growing to 7 m tall. Leaves are 7-12.5 cm long, pinnate, with 7-11 leaflets, the leaflets 3-5 cm long and 1.5-2 cm broad; there are numerous short (3-6 mm) spines on both the stems and the leaf petioles, and large (several cm) knobs on the branches. Flowers are produced in slender cymes, each flower about 4-5 mm diameter. Berry is about 3-4 mm, has a rough reddish brown shell that splits open to release the black seeds from inside.

Anaesthetic, anthelmintic, aromatic, astringent, carminative, diuretic, emmenagogue, stimulant, sudorific, vasodilator and vermifuge (fruits); anaesthetic, anthelmintic, antibacterial, antifungal, antihypertensive and diuretic (pericarp)

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Fruits are pulverised then mixed with water for internal application in the treatment of chills and pains in the abdomen, vomiting, cold-damp diarrhoea and dysentery, ascariasis-caused abdominal pain and moist sores on the skin. The pericarp is effective against the pork tapeworm, Taenia solium, and is also used in the treatment of gastralgia, dyspepsia, diarrhoea, abdominal pain, ascariasis and dermal diseases.