Blueberry

Tap it to peel back its skin.

Blueberries are small round berries that grow on bushes; the main cultivated kinds come from North America. A fresh one wears a dusty, pale coat called bloom: a thin layer of wax the berry makes to protect itself. At the bottom sits a little five-pointed crown, the leftover end of the flower.

Tap it and the dark skin peels back toward you in five strips to show the pale green flesh, then closes again. Almost all the blue is in the skin; the inside of most blueberries is pale.