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Blackjack Oak (Quercus marilandica): Characteristics, Habitat, and Uses

The Blackjack Oak (Quercus marilandica) is a tree that typically grows up to 50 feet tall, with low, downward-growing limbs. Its trunk can reach 18 inches in diameter and is often knarled. The bark is gray or brown and roughens with age. The leaves are thick, rounded at the base, and feature three lobes, displaying vibrant fall colors. This tree thrives in poor soil and is primarily found in the South and Midwest, often on dry, rocky cliffs. The Blackjack Oak is primarily utilized for fuel, especially charcoal.

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Blackjack Oak (Quercus marilandica): Characteristics, Habitat, and Uses

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  1. Blackjack OakQuercusMarilandicaMuench By, Ronnie Booth

  2. Classification Kingdom- Plantae Subkingdom-Tracheobionta Superdivision- Spermatophyta Division- Magnoliophyta Class- Magnoliopsida Subclass- Hamamelididae Order-Fagales Family- Fagaceae Genus- Quercus L. Species- QuercusMariliandicaMuench1

  3. Shape, Type, and Form Figure 1- blackjack oak form • The blackjack oak is a tree that grows to a maximum of 50 feet tall, mostly it is much shorter. • It has limbs that grow lower to the ground and grow downwards. • The trunk of the tree can grow up to a 18 inches in diameter. The trunk is often very knarled2

  4. Bark Figure 2- Blackjack Oak Bark The bark of a blackjack oak is a gray or brown color. As the tree matures, the bark becomes less smooth and more rough.2

  5. Twig Figure 3- Blackjack Oak Twig • The twigs of a blackjack oak are medium sized, with alternating leaves. • They are brown in color and are a little hairy. • Most of the leaf scars on the twigs are toward the tip of the twigs.2

  6. Leaf Figure 4- Blackjack Oak Leaf • The leaf of a blackjack oak’s leaf is thicker than most leaves. • It has a rounded base with a three lobed tip • In the fall they turn a variety of colors.3

  7. Bud Figure 5- Blackjack Oak Bud The bud of a blackjack oak are rather small. They are slightly angled, and are normally between a half and a quarter inch long.2

  8. Flower Figure 6- Blackjack Oak Flower • The flowers are in groups of 2-3. • They droop down.2

  9. Fruit Figure 7- Blackjack Oak Fruit • The acorn is nearly round. • They can be up to half an inch in diameter. • The top of the acorn covers nearly half the acorn.2

  10. Habitat and Range Figure 8- Blackjack Oak Range • The Blackjack Oak is mostly found in poor soil. • Mostly found on dry rocky cliffs. • Found mostly in the South and Midwest.2

  11. Uses • The blackjack oak is mostly used for fuel, especially charcoal. 2

  12. Works Cited 1- USDA, NRCS. 2004. The PLANTS Database, Version 3.5 (http://plants.usda.gov/java/profile?symbol=QUMA3). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. Reviewed on 6-22-10. 2- Mohlenbrock, R. H. (n.d.). Blackjack Oak. Forest trees of illinois. Illinois: Illinois Department of Resources Division of Forest Resources. 3- Steyermark, J.A. (1981). QuercusMarilandicaMuenchh. (1981). Flora of Missouri. Annes, Iowa, United States of America: The Iowa State University Press.

  13. Image Cited Figure 1: Blackjack Oak Form No Date Date Retrieved: 6-22-10 http://www.arlingtontx.gov/park/forestry/images/trees/Black%20Jack%20Oak.jpg Figure 2: Blackjack Oak Bark No Date Date Retrieved: 6-22-10 http://www.discoveret.org/utarboretum/blackjackbark.jpg Figure 3: Blackjack Oak Twig 2002, Steven J. Baskauf Date Retrieved: 6-22-10 http://www.cas.vanderbilt.edu/bioimages/image/q/quma3-tw15878.htm Figure 4: Blackjack Oak Leaf No Date Date Retrieved: 6-22-10 http://www.cas.vanderbilt.edu/bioimages/q/wquma3-lf15871.jpg

  14. Images Cited Figure 5: Blackjack Oak Bud No Date, Craig Rowe Date Retrieved: 6-22-10 http://3.bp.blogspot.com/_UdIftRLT2AY/SunrsB6DajI/AAAAAA AABxo/nyYJTu6ZyKc/s400/091031BlackjackOakBud.jpg Figure 6: Blackjack Oak Flower 2008, Will Cook Date Retrieved: 6-22-10 http://www.duke.edu/~cwcook/trees/quma40384.jpg Figure 7:Blackjack Oak Fruit No Date Date Retrieved: 6-22-10 http://www.oplin.org/tree/fact%20pages/oak_blackjack/fruit.jpg Figure 8: USDA, NRCS. 2004. The PLANTS Database, Version 3.5 (http://plants.usda.gov/java/profile?symbol=QUMA3). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. Reviewed on 6-22-10.

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