What is a "pin cherry"?

The pin cherry, also known as Prunus pensylvanica, is a small fruit native to North America. It grows on the pin cherry tree, which is commonly found in forests, woodlands, and other natural habitats across the continent. Pin cherries are small and round, with bright red to dark purple skin when ripe. They have a tart and slightly bitter flavor, and their flesh surrounds a single large pit or stone in the center. Pin cherries are often too tart to be eaten fresh and are not commonly used in culinary applications due to their sourness and small size. However, they are enjoyed by wildlife, including birds and small mammals.