Its Scientific name is Averrhoa Bilimbi.
Ilimban puli tree is very common in Ernakulam. A common belief exists that its fruits have the qualities to reduce cholestrol level. The fruits have thick flesh and juicy. Its used to make pickles. One of my friends told that they had used these fruits to make vine!!! Its a difficult task to eat this fruit because of its sourness. In some areas its eaten with salt and spice. Some call this as 'Chemmeen puli', its used as an ingredient in Chemmeen dishes.