The tree that bears fruit known as chestnuts is the chestnut tree, specifically those of the genus Castanea. There are several species of chestnut trees, including the American chestnut (Castanea dentata), the European chestnut (Castanea sativa), and the Chinese chestnut (Castanea mollissima). These trees produce edible nuts encased in spiky husks, which are harvested in the fall. Chestnuts are not only consumed roasted or boiled but are also used in various culinary dishes, including stuffing and desserts. Historically, chestnut trees were significant for providing timber and food, particularly in regions where they were abundant. However, many populations faced decline due to disease in the 20th century.