A shrub. It has a dense bushy habit. It can grow up to 15 m tall but is often 2-6 m tall and 2-4 m wide. Leaves are 1-6 cm long and 1-2.5 cm across. The leaves are broader than finger lime. The leaves are dull green, thick and leathery. Sometimes leaves have broad notches at the tip. Twigs have thorns. The flowers occur singly in the axils of leaves. They are 1 cm across and white. They have a scent. The fruit are finger shaped and 5-10 cm long by 1-3.5 cm wide. They have both a green skin and a green pulp. The skin is up to 2 mm thick and rough. The skin contains large oil glands. Cut fruit smell of citrus. There are few seeds which are 7 mm long.