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Carya glabra - Wikipedia
Carya glabra - North Carolina Extension Gardener Plant Toolbox
Carya glabra - Plant Finder - Missouri Botanical Garden
Carya glabra (pignut hickory): Go Botany
Carya glabra (Pignut Hickory) - Gardenia
Pignut hickory | The Morton Arboretum
ENH280/ST121: Carya glabra: Pignut Hickory - EDIS
Hickories- Pignut hickory
Pignut Hickory | Department of Horticulture
Carya glabra - Trees and Shrubs Online