The plants in this order best known in English gardens are _Styrax officinale_, the Storax, and _Halesia tetraptera_, the Snowdrop-tree. The flowers of both are white; those of Storax are funnel-shaped, with a five-cleft limb; there are ten stamens, growing together at the base, with short filaments, and very long anthers. The fruit is a drupe which is nearly dry, containing a one-celled nut, enclosing from one to three seeds. The seeds have two skins, the inner one like a cobweb, and the outer one spongy. The bark, when wounded, affords the gum called storax. Halesia has drooping bell-shaped white flowers, something like those of the Snowdrop, (see _a_ in _fig._ 139,) with four petals and twelve or sixteen stamens combined into a tube at the base. The fruit is a dry, winged drupe, which has four angles in _H. tetraptera_ (_b_), and two in _H. diptera_; and which contains a stone or putamen (_c_), which has two or four cells, and as many seeds. Some botanists make Halesiaceæ a separate order. ORDER CXX.—MYRSINEÆ. Showy shrubs, with evergreen leaves, and cymes of white or red flowers, which require a stove or greenhouse in England. The plants belonging to this order may be easily known on cutting open their flowers, as they are the only monopetalous flowers among the stove plants that have the stamens opposite the lobes of the corolla; the general position of the stamens being between the lobes. The principal genera in this order are Myrsine, the species of which are greenhouse shrubs; and Ardisia, the latter being well-known stove shrubs, with white flowers and red berries. Theophrasta, Clavija, and Jacquinia, were included in this order; but they are now formed into a new one, under the name of Theophrasteæ. ORDER CXXI.—SAPOTEÆ. This order is best known by the genera _Argania_, _Sideroxylon_, _Chrysophyllum_, and _Bumelia_, all of which are stove or greenhouse plants. The seeds of _Achras Sapota_ contain abundance of oil, which is so concrete as to have the appearance of butter; and hence the tree is called the Butter-tree. _Sideroxylon_ has such hard wood as to be called the Iron-tree. The juice of all these plants is milky, and the milk is wholesome as food. ORDER CXXII.—EBENACEÆ. The principal genus is Diospyros; which contains the Ebony-tree (_D. Ebenum_), the Date-plum or Lotus-tree (_D. Lotos_), both natives of the East Indies; and the Persimon (_D. virginiana_), a native of North America. The species are trees with hard dark wood; that of Ebony is quite black when old, and remarkably heavy. The flowers are white and inconspicuous, and the fruit, which is eatable, but insipid, is a berry, placed in the centre of the calyx, which spreads round it like a saucer. It is very harsh when first gathered, and must be kept till it is half decayed, like the Medlar, before it is eaten. ORDER CXXIII.—BREXIEÆ. Large stove trees, with axillary branches of white flowers. ORDER CXXIV.—OLEINÆ.—(SEE CHAP. VIII. P. 136.)