lowbush blueberry

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A low-growing deciduous rhizomatous shrub (Vaccinium angustifolium) in the heath family, native to northeastern North America and widely harvested for its edible blue or blue-black berries.
• noun Any of several similar plants in the genus Vaccinium.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A wild North American blueberry, Vaccinium angustifolium, sometimes grown commercially for its fruit