Botanical Name: Ceratonia siliqua. Other Common Names: Locust bean, St. John's bread. Habitat: The carob tree is native to the Mediterranean region and some parts of Western Asia and the Middle East. Plant Description: The carob is a dome-shaped evergreen tree that is a member of the pea family. It can reach over thirty feet or ten meters in height when fully grown. The compound leaves are dark green and the tree bears green flowers which blossom in the autumn. The fruit of the carob tree are called pods, brown in color, and take a year to ripen. Plant Part