Limonia acidissima is the only species within the monotypic genus Limonia. Common names for this South Asian species in English include wood-apple and elephant-apple. It is sometimes also called monkey fruit.
Limonia acidissima is a large tree growing to tall with rough, spiny bark. The leaves are pinnate, with 5âÂÂ7 leaflets, each leaflet 25âÂÂ35 mm long and 10âÂÂ20 mm broad, with a citrus-scent when crushed. The flowers are white and have five petals. The large fruit is a berry 5âÂÂ9 cm diameter, and may be sweet or sour. It has a very hard rind similar to a rock, which can be cracked open. It appears greenish-brown on the outside, and contains sticky brown pulp and small white seeds. The fruit looks similar in appearance to the bael fruit (Aegle marmelos).
A number of other species formerly included in the genus are now treated in the related genera Atalantia, Citropsis, Citrus, Glycosmis, Luvunga, Murraya, Micromelum, Naringi, Pamburus, Pleiospermium, Severinia, Skimmia, Swinglea, and Triphasia.
Limonia acidissima is native to India (including the Andaman Islands), Bangladesh, and Sri Lanka. The species has also been introduced to Indochina and Malesia.
The fruit is used to make a fruit juice with astringent properties and jams. Ripe fruit can be used as a pickle (mashed with green chili pepper, sugar and salt only).
In some parts of India, mainly Gujarat, the fruit pulp is used to make chutney, which is then used as a main condiment in and on top of meals, especially in winter.
The wood apple is ubiquitous in Tamil Nadu, where the ripe fruit is eaten mixed with sugar or another sweetener. The name of the wood apple (vilam) is used as the canonical example of a two-syllable prosodic foot in traditional Tamil song.
In Myanmar, the wood is used to make the distinctive local face cream thanaka.
The fruit contains a considerable amount of protein, carbohydrate, iron, fat, calcium, and vitamins B and C.