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Averrhoa bilimbi

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Averrhoa bilimbi

Averrhoa bilimbi (commonly known as bilimbi, cucumber tree, or tree sorrel) is a fruit-bearing tree of the genus Averrhoa, family Oxalidaceae. It is native to the Maluku Islands and Sulawesi in Indonesia, and has become naturalised and is common throughout Southeast Asia. It is cultivated in parts of tropical South Asia and the Americas. It bears edible but extremely sour fruit. It is a close relative of the carambola tree.

Averrhoa bilimbi is a small tropical tree reaching up to 15 m in height. It is often multitrunked, quickly dividing into ramifications. Bilimbi leaves are alternate, pinnate, measuring approximately 30–60 cm in length. Each leaf contains 11-37 leaflets; ovate to oblong, 2–10 cm long, and 1–2 cm wide, and cluster at branch extremities. The leaves are quite similar to those of the Otaheite gooseberry. The tree is cauliflorous with 18–68 flowers in panicles that form on the trunk and other branches. The flowers are heterostylous, borne in a pendulous panicle inflorescence. There flower is fragrant, corolla of 5 petals 10–30 mm long, yellowish green to reddish purple.

The fruit is ellipsoidal, elongated, measuring about 4 – 10 cm and sometimes faintly 5-angled. The skin is smooth to slightly bumpy, thin, and waxy turning from light green to yellowish-green when ripe. The flesh is crisp and the juice is sour and extremely acidic and therefore not typically consumed as fresh fruit by itself.

The odd-pinnate leaves hang down at night, then raise in the morning in stages like "two steps forward, one step back" and descend in the same manner in the evening.

A. bilimbi is believed to be originally native to Moluccas, Indonesia, the species is now cultivated and found throughout Indonesia, Timor-Leste, the Philippines, Sri Lanka, Bangladesh, Maldives, Myanmar (Burma), and Malaysia. It is also common in other Southeast Asian countries. In India, where it is usually found in gardens, the bilimbi has gone wild in the warmest regions of the country. It is also seen in coastal regions of South India.[citation needed]

Outside of Asia, the tree is cultivated in Zanzibar. In 1793, the bilimbi was introduced to Jamaica from Timor and after several years, was cultivated throughout Central and South America where it is known as mimbro. In Suriname, this fruit is known as lange birambi. Introduced to Queensland at the end of the 19th century, it has been grown commercially in the region since that time. In Guyana, it is called Sourie, One Finger, Bilimbi, and Kamranga.[citation needed]

This is a tropical tree, less resistant to cold than the carambola, growing best in rich and well-drained soil (but also stands limestone and sand). It prefers evenly distributed rainfall throughout the year, but with a 2- to 3-month dry season. Therefore, the species is not found, for example, in the wettest part of Malaysia. In Florida, where it is occasionally cultivated as a curiosity, the tree needs protection from wind and cold.

In Indonesia, A. bilimbi, locally known as belimbing wuluh, is often used to give a sour or acidic flavour to food, substituting tamarind or tomato. In the northwestern province of Aceh, it is preserved by salting and sun-drying to make asam sunti, a kitchen seasoning to make a variety of Acehnese dishes. It is a key ingredient in many Indonesian dishes such as sambal belimbing wuluh.

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