Averrhoa carambola is a slow growing small tropical tree in the family Oxalidaceae. It is native to Assam and tropical Southeast Asia. The Assamese common names of the tree are কৰদৈ, ৰহদৈ (Kordoi, Rohdoi). Other common names are Carambola, Star fruit, and Five-corner. It is a small tree or shrub that grows 5 to 12 m tall.
The branches of Carambola are hanging down and are profuse. The wood is white and bark is reddish. Leaves are compound. The arrangement of leaves of the tree is spiral, leaves are pinnate and leaflets are alternate, shape of leaflets is ovate, and margin is entire. The green leaflets are sensitive to light and fold inward at night. The front sides of the leaves are glabrous and the undersides are hairy and whitish. Flowers are produced in the axils of leaves at the end of twigs and colours of flowers are pink-red with mixture of purple. The carambola plant gives flowers and fruits four times yearly. The flowers are arranged in small clusters on the ends of the branches or stems and trunk, each cluster is attached to the tree with red stalks. The fruit is fleshy with five ridges, shape of fruit is ovate to elliptoid, and colour is yellow-orange. The tree flowers and bears fruit almost year-round. Carambola is eaten fresh. Fruits of some trees taste acidic and some trees taste sweet.
The edible fruit of star fruit has some medicinal uses. The fruit can be eaten raw or pickled. The flowers can also be eaten raw. The leaves are also edible. The fruit acts as a laxative and is used for treatment fever, skin disorders, high blood pressure, diabetes, asthma, colic, and jaundice.
Classification of Averrhoa carambola
Kingdom : Plantae
Phylum : Tracheophyta
Class : Magnoliopsida
Order : Oxalidales
Family : Oxalidaceae
Genus : Averrhoa
Accepted name : Averrhoa carambola L.