Celtuce (Lactuca sativa var. augustana, angustata, or asparagina), also called stem lettuce, celery lettuce, asparagus lettuce, or Chinese lettuce, is a cultivar of lettuce grown primarily for its thick stem or its leaves. It is used as a vegetable. In Mainland China, the family is informally called woju (traditional Chinese: 萵苣; simplified Chinese: 莴苣; pinyin: wōjù), which is also the name of a cultivar.[citation needed] It is especially popular in both mainland China and Taiwan, where the stem is interchangeably called wosun (traditional Chinese: 萵筍; simplified Chinese: 莴笋; pinyin: wōsǔn) or qingsun (青筍; 青笋; qīngsǔn). Prepared separately, the leaves are called youmaicai (油麥菜; 油麦菜; yóumàicài). The pale green leaves, which are tender, and white stems can be eaten raw (in salads) or cooked. It can be pickled, grilled, roasted, or stir-fried. Rau Diep Thom Rau Diep Ngong lettuce Seeds 莴笋种子 Rau Tien Vua - Ngo Xuan asparagus Luttuce Woju Wosum seeds Lactuca Sativa var.