Figure 1: Silhouette of Pignut Hickory

 

 


Pignut Hickory

Carya glabra (P. Mill.) Sweet


    Pignut hickory (Carya glabra) is a common but not abundant species in the oak-hickory forest association in Eastern United States. Other common names are pignut, sweet pignut, coast pignut hickory, smoothbark hickory, swamp hickory, and broom hickory. The pear-shaped nut ripens in September and October and is an important part of the diet of many wild animals. The wood is used for a variety of products, including fuel for home heating. [1]  

 

   

 

 

 

 

Classification:

 

Kingdom Plantae Plants
Subkingdom

Tracheobionta

Vascular Plants

Superdivision

Spermatophyta

Seed Plants

Division

Magnoliophyta Flowering Plants

Class

Magnoliopsida Dicotyledons
Subclass

Hamamelididae

 
Order Juglandales  

Family

Juglandaceae Walnut Family
Genus Carya Nutt. Hickory
Species Carya glabra (P. Mill.) Sweet Pignut Hickory

Figure 2: Classification Table

 

Shape, Form, and Type:

    The Pignut Hickory tree has a regular, open oval head and slender, contorted branches. At maturity, it can reach 50 to 60 feet it height and 25 to 35 feet in width. I also has a rapid growth rate. [2]

 

 

Figure 3: Pignut Hickory Tree


Bark and Twig Description:


    The bark of the Pignut Hickory is gray and smooth when the tree is young. As the tree ages, the bark peels off into narrow strips, but these are not as extensive or curling as in shagbark hickory (Carya ovata). The twigs are reddish, brown, slender and usually smooth. [3]

 

                                        

            Figure 4: Bark                               Figure 5: Twig with Buds


Leaf and Bud Description:

    Pignut hickory leaves are 6 to 12 inches long, alternate, and pinnately compound with 5 to 7 leaflets. The leaflets are finely toothed, smooth, lance-shaped, pointed at the tip and tapering at the base. They are green on the upper surface and may be dotted and have hairs on the underside. The terminal  buds are relatively small, hairy edged, brown with tiny yellow dots, and rounded with a short point at the tip. [4]

 

Figure 6: Leaf


Flower and Fruit Description:

    The flower of the Pignut Hickory is monoecious. The males are yellow-green, drooping catkins, with three hanging from one stalk. They are 2 to 3 inches long. The females are very short and found in clusters at the end of the branches. Both flowers appear in Spring. The fruit is obovoid to pear-shaped, 1 to 2 inches long, with a thin husk that only partially splits upon maturation. The nut is not ribbed, fairly round but flattened. Its seed is somewhat bitter, ripening in early Fall. [5]

 

                     

Figure 7: Fruit                                  Figure 8: Nut


Habitat, Range, and Uses:

    This tree grows well in fairly rich, well drained to dry soils. It occurs with other hickories and with oaks, characteristically on hillsides and ridges. The Pignut Hickory occurs throughout most of the eastern United States and westward to eastern Texas. In Ohio it is found in the southernmost and eastern counties. As with other hickories the wood of this tree is tough and strong. It is used for tools and athletic equipment. The nuts of this particular hickory, unlike some of the others, are bitter and scarcely edible. [6]

 

Figure 9: Map of Range of Pignut Hickory

 

 

References:

Text:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Additional Thanks to These

 Sources:

1. 1998. Glendon W. Smalley.  Carya glabra (Mill.). Date Retrieved: 6/28/07

    http://www.na.fs.fed.us/spfo/pubs/silvics_manual/Volume_2/carya/glabra.htm

2. 2007. Trees: Carya glabra. Date Retrieved: 6/28/07

    http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/carya_glabra.html

3. 2007. Carya glabra. Date Retrieved: 6/28/07

    http://www.museum.state.il.us/muslink/forest/htmls/trees/C-glabra.html

4. 2007. Carya glabra. Date Retrieved: 6/28/07

    http://www.museum.state.il.us/muslink/forest/htmls/trees/C-glabra.html

5. 2007. Carya glabra Fact Sheet. Date Retrieved: 6/28/07

    http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=19

6. 2005. Pignut Hickory. Date Retrieved: 6/28/07

    http://www.oplin.org/tree/fact%20pages/hickory_pignut/hickory_pignut.html

 

 

 

 

Figure 1: Silhouette of Pignut Hickory

1993. Edward F. Gilman and Dennis G. Watson. Carya glabra. Date Retrieved: 6/28/07

http://hort.ufl.edu/trees/CARGLAA.pdf

 

Figure 2: Classification Table

2007. PLANTS Profile. Date Retrieved: 6/28/07

http://plants.usda.gov/java/profile?symbol=CAGL8

 

Figure 3: Pignut Hickory Tree

2005. Pignut Hickory. Date Retrieved: 6/28/07

http://www.oplin.org/tree/fact%20pages/hickory_pignut/hickory_pignut.html

 

Figure 4: Bark

2007. Carya glabra Fact Sheet. Date Retrieved: 6/28/07

http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=19

 

Figure 5: Twig with Buds

2007. Carya glabra Fact Sheet. Date Retrieved: 6/28/07

http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=19

 

Figure 6: Leaf

2006. Pignut hickory. Date Retrieved: 6/28/07

http://www.sfrc.ufl.edu/4h/Pignut_hickory/pignhick.htm

 

Figure 7: Fruit

2005. Pignut Hickory. Date Retrieved: 6/28/07

http://www.oplin.org/tree/fact%20pages/hickory_pignut/hickory_pignut.html

 

Figure 8: Nut

2007. Carya glabra Fact Sheet. Date Retrieved: 6/28/07

http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=19

 

Figure 9: Map of Range of Pignut Hickory

1998. Glendon W. Smalley.  Carya glabra (Mill.). Date Retrieved: 6/28/07

http://www.na.fs.fed.us/spfo/pubs/silvics_manual/Volume_2/carya/glabra.htm

 

 

 

 

 

 

 

http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=19


http://www.sfrc.ufl.edu/4h/Pignut_hickory/pignhick.htm


http://www.na.fs.fed.us/spfo/pubs/silvics_manual/Volume_2/carya/glabra.htm


http://plants.usda.gov/java/profile?symbol=CAGL8


http://www.museum.state.il.us/muslink/forest/htmls/trees/C-glabra.html


http://www.oplin.org/tree/fact%20pages/hickory_pignut/hickory_pignut.html


http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/carya_glabra.html


http://hort.ufl.edu/trees/CARGLAA.pdf


http://www.ag.auburn.edu/hort/landscape/dbpages/14.html


http://www.pfaf.org/database/plants.php?Carya+glabra