The blueberry bush (Vaccinium sect. Cyanococcus) is a flowering shrub that produces berries with a bluish, purple hue — also known as blueberries.
It is closely related to similar shrubs, such as those that produce cranberries and huckleberries.
Blueberries are small — around 0.2–0.6 inches (5–16 millimeters) in diameter — and feature a flared crown at the end.
They are green in color when they first appear, then deepen to purple and blue as they ripen.
The two most common types are:
- Highbush blueberries: The most common cultivated variety in the US.
- Lowbush or “wild” blueberries: Typically smaller and richer in some antioxidants.
- Fiber: 4 grams
- Vitamin C: 24% of the RDI
- Vitamin K: 36% of the RDI
- Manganese: 25% of the RDI
- Small amounts of various other nutrients
They are also about 85% water, and an entire cup contains only 84 calories, with 15 grams of carbohydrates.
Calorie for calorie, this makes them an excellent source of several important nutrients.