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Carya ovata

life science Maturity 9-11 Next article →

The shagbark hickory, known scientifically as *Carya ovata*, is a large deciduous tree native to eastern North America.

Shagbark hickory spring leaf cluster
Shagbark hickory spring leaf cluster

It is a significant part of forest ecosystems because it provides food for many different animals. This tree is also famous for its incredibly strong and tough wood. While it is a common species, it can be difficult to grow in orchards. This is because the tree is unreliable when it comes to producing fruit.

Carya ovata Noyer blanc
Carya ovata Noyer blanc

It can grow to a very large size and live for more than 350 years.

The tree has a unique way of growing and changing over time. Young shagbark hickories have smooth bark. However, as the tree matures, the bark becomes shaggy and peels away in long strips. This distinct look is how the tree earned its common name.

Carya ovata mature fruit
Carya ovata mature fruit

The leaves are long and pinnate, which means they have leaflets arranged along a central stem. Most leaves have five leaflets, though you may occasionally see three or seven. The terminal three leaflets are much larger than the two at the base. The tree is also monoecious. This means it has both male and female flowers on the same plant. The male, or staminate, flowers grow on long-stalked catkins. The female, or pistillate, flowers grow in short terminal spikes.

There are two main varieties of the shagbark hickory. The first is *Carya ovata* var. *ovata*, often called the northern shagbark hickory. This variety has large leaflets that are over 6 inches long and nuts that are also long. The second variety is *Carya ovata* var. *australis*, known as the southern shagbark or Carolina hickory. This variety has smaller leaflets, measuring under 6 inches, and smaller nuts.

Phylloxera. Carya ovata. Leaf
Phylloxera. Carya ovata. Leaf

Some scientists even consider the southern variety to be its own separate species, *Carya carolinae-septentrionalis*.

History shows that humans have relied on this tree for thousands of years. Native Americans used the hickory nuts as a vital staple in their diets. At an ancient site in Georgia, researchers found hickory nuts and tools used for processing them. These tools suggest that people stored and processed the nuts on a large scale. They used the nut meat to make drinks, corn cakes, and hominy. The wood was also very important for making bows and smoking meat. The name "hickory" itself comes from an older word, *pawcohiccora*, which meant hickory-nut meat or a nut milk drink.

The nuts of the shagbark hickory are a drupe. This means they have a hard, bony shell inside a thick, green husk. The husk has four sections and splits open in the fall when the nut is mature.

Carya ovata mature fruit
Carya ovata mature fruit

Producing these nuts is a slow process. A tree begins to produce seeds at about 10 years of age. However, it does not produce large quantities until it is 40 years old. It can continue producing for at least 100 years. Even then, production is erratic. A tree might have a good crop every 3 to 5 years, but other years may have none at all. Animals like squirrels, raccoons, and black bears often eat the crops, sometimes causing the entire harvest to be lost.

The wood of the shagbark hickory is incredibly dense and heavy. When air-dried, it weighs about 63 pounds per cubic foot. Because it is so tough, it is used to make tools that need strength, such as axe handles, ploughs, and drum sticks. This toughness even influenced human history. The seventh U.S. President, Andrew Jackson, was nicknamed "Old Hickory" because of his tough character. In Tennessee, six shagbark hickories once stood around his grave site. They remained there for 168 years until a storm destroyed many trees at the site in 1998.

Today, the shagbark hickory connects to many different scientific fields. In genetics, we see that it can hybridize with other trees like the pecan. It has 32 chromosomes, which allows it to cross with other species in the *Carya* genus. This can create "hican" varieties used in some commercial settings. In ecology, the tree supports a wide range of wildlife, from mice to wild turkeys. Because these trees have large taproots, they are difficult to transplant. This makes them better suited for natural forests than for being used as ornamental trees in gardens.

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🖼️ Images & Media (4)
File:Carya ovata Noyer blanc.jpg
Carya ovata Noyer blanc.jpg
File:Carya ovata mature fruit.jpg
Carya ovata mature fruit.jpg
File:Shagbark hickory spring leaf cluster.jpg
Shagbark hickory spring leaf cluster.jpg
File:Phylloxera. Carya ovata. Leaf.jpg
Phylloxera. Carya ovata. Leaf.jpg
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