The clementine tree is a small, citrus fruit tree with sweet, seedless fruit. There are several synonyms for the clementine tree, including the mandarin orange tree, Christmas orange tree, and tangerine tree. All of these trees produce small, easy-to-peel fruit that is high in vitamin C and other nutrients. The mandarin orange tree and tangerine tree are more commonly known for their juicy fruit, while the Christmas orange tree is known for its distinctively sweet flavor. All of these trees require similar growing conditions, including full sun and well-drained soil.