Carya glabra, commonly known as the pignut hickory, is a deciduous tree that is widely distributed throughout the eastern United States. This species belongs to the genus Carya and is known for its hard and durable wood. However, there are several other common names used to describe this tree, including the red hickory, sweet pignut, and smoothbark hickory. While these terms are often used interchangeably, they can help to more accurately describe the specific characteristics of this species. Whether you call it Carya glabra or one of its synonyms, this tree remains an important part of the eastern forest ecosystem.