Carya glabra (Pignut Hickory)
- Images, distribution map, related taxa, and scientific classification.
- http://plants.usda.gov/java/profile?symbol=CAGL8

Carya glabra (Sweet Pignut Hickory)
- Detailed facts on native range, supporting soils, climate, associated cover, reproduction, and growth. Discusses wildlife and human uses.
- http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/carya/glabra.htm

Carya glabra
- Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/cargla/