Pignut Hickory – Carya glabra
Pale or Sand Hickory – Carya pallida
Mockernut Hickory – Carya tomentosa
Shagbark Hickory – Carya ovata

References and Additional Information

Hickory Species
[1]  UGA Extension: Native Plants for Georgia Part I: Trees, Shrubs and Woody Vines (B 987) – Hckory Species

Pignut Hickory
[2] Lady Bird Johnson Wildflower Center: Carya glabra
[3] Missouri Botanical Garden: Carya glabra

Pale or Sand Hickory
[4] Native Tree Society: Carya pallida
[5] Trees of the Southeastern United States – Wilbur H. and Marion B. Duncan

Mockernut Hickory
[6]  Lady Bird Johnson Wildflower Center: Carya tomentosa
[7]  Missouri Botanical Garden: Carya tomentosa

Shagbark Hickory
[8]  Lady Bird Johnson Wildflower Center: Carya ovata
[9]  Missouri Botanical Garden: Carya ovata