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Carya glabra (Mill.) Sweet

Pignut hickory

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderFagalesBirch, she-oak, beech, walnut, bayberry, others
FamilyJuglandaceaeWalnut family
GenusCaryaGreek κάρυον, “nut”
Speciesglabra“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.

Carya glabra (pignut hickory)

By Steve Hurst @ USDA-NRCS PLANTS Database.

Online References:

The Encyclopedia of Life

The USDA Forest Service's Silvics of North America site

Illinois Wildflowers


The University of Connecticut Plant Database

The Lady Bird Johnson Wildflower Center



Dirr, Michael A., Dirr’s Hardy Trees and Shrubs, Timber Press, 1997

Carya glabra (Mill.) Sweet var. glabra

Carya glabra (Mill.) Sweet var. hirsuta (Ashe) Ashe

Carya glabra (Mill.) Sweet var. megacarpa (Sarg.) Sarg.

Carya leiodermis Sarg.

Carya magnifloridana Murrill

Carya microcarpa (Nutt.) Britton

Carya ovalis (Wangenh.) Sarg. var. hirsuta (Ashe) Sarg.

Carya ×ovalis (Wangenh.) Sarg. var. hirsuta (Ashe) B. Boivin, nom. illeg.

Carya porcina (F. Michx.) Nutt. ex Elliott

Hicoria austrina Small

Hicoria glabra (Mill.) Britton

Hicoria glabra (Mill.) Britton var. hirsuta Ashe

Juglans porcina F. Michx.


Carya glabra description by Thomas H. Kent, last updated 25 May 2020.

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Carya glabra (pignut hickory)

7/28/2009 · Near Nashua River Boat Ramp, Groton, Mass­a­chu­setts · ≈ 10 × 7″ (26 × 17 cm) ID is uncertain


About this map...