Bilimbi (Averrhoa bilimbi) is a fruit-bearing tree in family Oxalidaceae, natives to the Moluccas, Indonesia. It is commonly cultivated or found semi-wild in Southeast Asian countries.
Averrhoa bilimbi is also known as cucumber tree and tree sorrel. It should not be confused with carambola or starfruit, which bears the same common name.
The bilimbi tree is a long-lived tropical tree with a short trunk and multiple upright branches.
The fruit is too sour to be eaten raw and are used for beverages and preserves. The juice, with its oxalic acid content, is useful for bleaching stains from the hands and rust from white cloth, and also removing tarnish from brass. Bilimbi grows best in full sun, rich, moist and well-drained soil. Propagation is by seeds.