A native of China and India, the orange was thence introduced into Europe, and afterwards transplanted to America during the early history of the country. Various parts of the tree are used in medicine. The leaves, which are bitter and aromatic, are in some places employed, in the form of an infusion, as a gently stimulating diaphoretic; but the rind of the fruit is the part of most value in medicine. There are two varieties, the bitter and the sweet. The bitter is a mild tonic, carminative, and stomachic; while the sweet is simply aromatic. Neither is much used by itself, but enter quite largely as correctives into various tonic compounds.