Endive is a bitter-tasting, curly leaved salad plant, also called chicory. There are several varieties, e.g. batavia and escarole. Endive is mainly used in salads and can also be braised. Endives are available in winter and summer.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.