blueberry

Any of various North American shrubs belonging to the heath family, growing in acid soil. The genus also includes huckleberries, bilberries, deerberries, and cranberries, many of which resemble each other and are difficult to tell apart from blueberries. All have small oval short-stalked leaves, slender green or reddish twigs, and whitish bell-like blossoms. Only true blueberries, however, have tiny granular speckles on their twigs. Blueberries have black or blue edible fruits, often covered with a white bloom. (Genus Vaccinium, family Ericaceae.)