The family of Compositae (Asteraceae) includes several leafy vegetables. Some of these include wild chicory or endive (Cichoriumintybus), curly chicory (Cichoriumendivia), let- tuce (Lactucasativa), and artichoke (Cyanarascolymus). Jerusalem artichoke (Helianthus tuberosus) is an exception and produces an edible tuber, though not widely used at present. Lettuceisoneofthemostpopularvegetables.Thereareseveralvarietiesoflettuceincluding the head lettuce, butterhead lettuce, leaf lettuce, and romaine lettuce.