This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
This genus contains about 100 species of erect or trailing evergreen or deciduous shrubs chiefly remarkable for their berried fruits black, red, or purple in colour. The plants like a moist peaty soil, and are used sparingly for shrubberies and rock gardens. They are increased by seeds, layers, and cuttings. Amongst the best-known species are V. Myr-tillus, the Common Whortleberry, Bilberry, or Blueberry; V. stamineum, the Dewberry or Huckleberry; and V. Vitis-Idcea, the Cowberry. All natives of North America.