Vaccinium Myrtillus
Blueberries are perennial flowering plants with blue or purple berries. They are classified in the section Cyanococcus within the genus Vaccinum.
Blueberries are usually prostrate shrubs that can vary in size from 10 centimeters to 4 meters in height. The leaves of blueberries can be either deciduous or evergreen, ovate to lanceolate, and 1–8 cm long and 0.5–3.5 cm broad. The flowers are bell-shaped, white, pale pink or red, sometimes tinged greenish.
The fruit is a berry 5–16 millimeters in diameter with a flared crown at the end; they are pale greenish at first, then reddish-purple, and finally dark purple when ripe. They have a sweet taste when mature, with variable acidity. Blueberry bushes typically bear fruit in the middle of the growing season: fruiting times are affected by local conditions such as climate, altitude and latitude, so the time of harvest in the northern hemisphere can vary from May to August.