莴苣,又叫千金菜、生菜、莴菜等,属菊科莴苣属中以叶球或肉质嫩茎为产品的一、二年生草本植物。按食用部分的器官形态,通常把莴苣分为叶用莴苣(生菜)和茎用莴苣(莴笋)两大类型。叶用莴苣主要包括皱叶莴苣、直立莴苣、结球莴苣三个亚种。皱叶莴苣又叫玻璃生菜,在欧洲、美洲等地有栽培,我国黑龙江、吉林、辽宁、内蒙古、北京、河北、天津、山东、四川、江西、贵州、浙江、 Lettuce, also known as Chrysanthemum, lettuce, lettuce, etc., is an Asteraceae genus leaf or fleshy stems for the product of a biennial herb. According to the edible part of the organ morphology, usually divided into lettuce leaf lettuce (lettuce) and stem lettuce (lettuce) two types. Leaf lettuce, including mainly lettuce, erect lettuce, lettuce three subspecies. Also known as lettuce glass lettuce in Europe, America and other places have cultivated China’s Heilongjiang, Jilin, Liaoning, Inner Mongolia, Beijing, Hebei, Tianjin, Shandong, Sichuan, Jiangxi, Guizhou, Zhejiang,