Review: The lemon is a hybrid in cultivated wild plants. It is the common name for the reproductive tissue surrounding the seed of the angiosperm lemon tree. The fruit is used primarily for its juice. A lemon tree can reach a height of 10 meters. Lemons are used to make lemonade, and as a garnish for drinks. The grated rind of the lemon, called lemon zest, is used to add flavor to baked goods, puddings, rice and other dishes. There is a belief in Ayurvedic medicine that a cup of hot water with lemon juice in it tonifies and purifies the liver.