This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Erect or procumbent shrubs. Leaves alternate; buds clothed with scales. . Flowers small, solitary or racemose, white or red. Corolla campanulate or urceolate. Stamens 8 to 10; anther-cells with tubular tips. Berry 4- or 5-celled. There are about 100 species in temperate Europe, Asia, and America, and three species are natives of Great Britain, V. Myrtillus, Whortleberry or Bilberry, being the commonest. This has angular stems, deciduous ovate toothed leaves, and solitary pink and white flowers, succeeded by glaucous bluish-black berries. V. Vitis-Idaea, Cowberry, has pubescent stems, evergreen leaves, racemose flowers, and red berries. It is rare in the central counties of England, and absent from the South. V. uligino-sum is a northern species of procumbent habit with glabrous stems, entire leaves, pink flowers, and dark blue berries. Oxy-coccospalustris, Cranberry, is sometimes united with Vaccinium, but differs in having a rotate corolla with reflexed lobes. It is remarkable for its slender thread-like branches and small leaves. The flowers are small and drooping, and the berries red. The origin of the name is not explained. Some of the North
American species are rather more showy than the indigenous, though none are very attractive. V. amoenum, syn. corymbo-sum, has much the habit of V. Myrtillus, with reddish flowers about 6 lines long.
Oxycoccos macrocarpus is the American Cranberry, so extensively cultivated for its fruit.