The genus Hypericum, or St. John’s Wort, agrees with the orange in having its leaves full of transparent cells; but these cells are filled with a yellow, resinous juice, resembling gamboge in its medicinal properties, and having a very disagreeable smell. There are five petals in the corolla; and the calyx consists of five sepals, which are unequal in size and shape, and joined together for only a short distance. Like the orange the filaments grow together at the base, in separate clusters or bundles; but in the Hypericum these clusters are so perfectly distinct, that the stamens may be readily separated into three or five bundles (according to the species), by slightly pulling them. The capsule is dry, and of a membrane-like texture, and it consists of three or five carpels, containing many seeds, and each having a separate style, and a pointed stigma. The flowers are very showy, from their large golden yellow petals and numerous stamens. The genus Androsæmum, the Tutsan, or Park-leaves, has been separated from Hypericum on account of its fruit being one-celled and one-seeded, with a fleshy covering, which yields a red juice when pressed. _H. calycinum_, with large yellow flowers and five tufts of stamens, is the handsomest species; but _H. perforatum_ is the true St. John’s Wort, which the country people used formerly to gather on midsummer eve, as a preservative against witchcraft. ORDER XXXIX.—GUTTIFERÆ.—THE MANGOSTEEN TRIBE. The only genus in this order that contains plants interesting to the English reader is Garcinia; and the most remarkable species are _G. Mangostana_, the Mangosteen, said to be the most delicious fruit in the world, and _G. Cambogia_, the tree producing the gamboge, which is a kind of gum that oozes out from the stem. Both are natives of the East Indies. ORDER XL.—MARCGRAAVIACEÆ. Exotic shrubs, mostly natives of the West Indies, with spiked, or umbellate flowers, and alternate leaves. Very seldom seen in Britain. ORDER XLI.—HIPPOCRATACEÆ. Exotic arborescent, or climbing shrubs, generally with inconspicuous flowers. Natives of the East and West Indies. ORDER XLII.—ERYTHROXYLEÆ.—THE RED WOOD TRIBE. Exotic shrubs, and low trees, remarkable from the redness of their wood, but with small greenish flowers. The leaves of _Erythroxylon Coca_ possess an intoxicating quality, and are chewed by the Peruvians, in the same manner as the Turks take opium. ORDER XLIII.—MALPIGHIACEÆ.—THE BARBADOES CHERRY TRIBE.