A relative of the lime plant, the kaffir lime is native to Southeast Asia. It grows best in warm, humid and sunny climates, and is an easily identified thorny bush with highly aromatic double leaves in an hourglass shape and pink flowers. It has bumpy green fruit that grows only to about 5 centimetres in diameter, turning from light to dark green as it ripens. The shiny, waxy leaves can be used fresh or dried, and are pungent with a lively flavor of lime and lime zest is unique to the plant and indispensable to Southeast Asian cooking. Its flavour is unique and likened to a combination of lemon, lemon verbena and lemon geranium.