This order includes the Whortle-berries, Bilberries, and Cranberries, and it is very nearly allied to Ericaceæ, from which it is distinguished by the disk, which lines the calyx, entirely surrounding the ovary, which is thus placed below the rest of the flower, and is called inferior. The fruit is a berry. ORDER CXV.—ERICACEÆ. (SEE CHAP. VII. P. 109.) All the Heath tribe, including the Arbutus, Rhododendron, Azaleas, &c., are distinguished by their anthers, which have a little hole or pore at the apex of each cell; each cell being also generally furnished with a kind of spur at its base. The stamens in all these genera grow from beneath the ovary, and the filaments are thick and fleshy. The fruit is a dry capsule, or follicle. ORDER CXVI.—PENEACEÆ. Beautiful shrubs, natives of the Cape of Good Hope, with the habit of Pimelea, and corymbs of pale pink flowers. The calyx is in two sepals, the stigma four lobed, and the fruit four-valved, with two seeds in each cell. § III.—COROLLIFLORÆ. The plants comprised in this division are called monopetalous, as they have their petals joined together, so as to form a cup for the stamens and pistils quite distinct from the calyx; and the stamens are attached to the corolla. ORDER CXVII.—EPACRIDEÆ. This order stands on debateable ground, being by many botanists included in the last division; but it seems properly placed in this, as the stamens are attached to the petals, which adhere together; and if a flower of any species of Epacris be examined, it will be found that the corolla, with the stamens attached to the lining of the tube, parts readily from the calyx without losing its natural form. The flowers are tubular or campanulate, with a five-cleft limb, and will divide readily into five petals, each of which has the filament of a stamen attached to it, leaving only the anthers free. The anthers are one-celled and awnless, and this is the principal distinction between this order and Ericaceæ. The calyx is five-cleft, coloured like the corolla; and there are five scale-like bracts below it, which look like a calyx. The capsule is dry, with the seeds attached to a central column. The leaves are dry, hard, and prickly. The species are natives of Australia, where they supply the place which the Heaths hold in Europe and Africa; no Heath having been yet found in any part of Australia. ORDER CXVIII.—SYMPLOCINEÆ. This order contains one genus, Symplocos, of greenhouse and stove shrubs, from South America, with small white flowers, and serrated leaves, which turn yellow in drying. ORDER CXIX.—STYRACINEÆ. [Illustration: FIG. 139.—SNOWDROP TREE (_Halesia tetraptera_).]