Lettuce originated in ancient Egypt where it was depicted in temple carvings and considered an aphrodisiac food. Ancient Greek physicians believed lettuce could induce sleep. It was cultivated by Romans and spread to France and the New World by Christopher Columbus. Lettuce is now widely produced around the world, originally domesticated in Egypt but major producers include China, United States, Chile, Japan, India, Spain, and Italy. Taxonomically, lettuce belongs to the plant kingdom, asterales order, asteraceae family, and its scientific name is Lactuca sativa.