Blueberries are small fruits of a shrub tree, which belongs to the heath (Ericaceae) family. Other members of this family include cranberry, bilberry, azalea, mountain laurel and rhododendron. These berries grow in clusters and vary in size from that of the size of a pea, to the size of a marble. The colour often ranges from maroon to purple black. The flesh of the blueberries is semi-transparent and encases tiny seeds.The berries borne by the tree are large, juicy and have a mild and sweet flavour.