Genus Castanopsis is a group of evergreen trees and shrubs widely distributed in Asia and Oceania. They are commonly known as chinquapins, chestnuts, or Japanese oaks. The genus contains approximately 125 species, including both small shrubs and large trees. Some common synonyms for Genus Castanopsis include Lithocarpus, Pasania, and Chrysolepis. Lithocarpus species are often referred to as stone oaks, while Pasania species are commonly known as Japanese chestnuts. Chrysolepis species are typically found in North America and are known as chinquapins. Despite their different names, all species of Genus Castanopsis share similar characteristics, including toothed leaves, catkin flowers, and edible fruits.