Have you tried using the leaves?
They don't taste like lemons at all. I definitely wouldn't chop down the tree!
The leaves are used most often, but the zest of the limes definitely is used in cooking as well (otherwise I wouldn't be able to buy dried zest in the Thai shop). The juice is used, but not often.
The rind (peel) is commonly used in Lao and Thai curry paste, adding an aromatic, astringent flavor. The zest of the fruit, referred to...