Carya glabra (Pignut hickory)

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Carya glabra (Mill.) Sweet

Pignut hickory

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Fagales	Birch, she-oak, beech, walnut, bayberry, others
Family	Juglandaceae	Walnut family
Genus	Carya	Greek κάρυον, “nut”
Species	glabra	“Smooth or hairless”

About plant names...

Pignut hickory is common, but not abundant, in forests in the eastern United States.

Identification: Pignut hickory is up to 60' (18 m) high and 35' (10 m) wide. Leaves are shiny green, bright yellow in fall, in groups of 5 or 7 leaflets. Male flowers are catkins 2-3" (5-7.6 cm) long, hanging in groups of 3. Female flowers are short, clustering at the ends of branches. Seeds are 1-2" (2.5-5 cm) in diameter, enclosed in thin husks. They may be oval or pear-shaped.