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Knowlton's hophornbeam facts for kids

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Knowlton's hophornbeam
Conservation status

Vulnerable (NatureServe)
Scientific classification
Genus:
Ostrya
Species:
knowltonii

The Knowlton's hophornbeam (scientific name: Ostrya knowltonii) is a special kind of tree. People also call it the western hophornbeam, woolly hophornbeam, or wolf hophornbeam. It's even known as an ironwood tree because its wood is super strong!

This tree naturally grows in parts of the United States, like Utah, Arizona, New Mexico, and Texas. However, it's not found everywhere in these states; it grows in specific, scattered places.

What It Looks Like

The Knowlton's hophornbeam is a medium-sized tree. It can grow to be about 9 to 12 meters (that's about 30 to 40 feet) tall. Imagine a tree as tall as a three-story building!

Trunk and Branches

This tree usually has a short trunk. From this trunk, many branches spread out in a crooked way. The top part of the tree, called the crown, looks nicely rounded.

Bark and Leaves

The bark of the Knowlton's hophornbeam is brownish-gray. It has deep grooves that make it look like it's covered in scales or strips. Its leaves are fairly small, growing up to about 6.3 centimeters (about 2.5 inches) long. The edges of the leaves are serrated, which means they look like tiny saw blades.

Flowers and Fruit

This tree has two types of flowers: male and female. They grow on separate, hanging clusters called catkins. The male catkins can be up to 3 centimeters long, while the female ones are shorter, about 1 centimeter. After the flowers, the tree produces a small fruit called a nutlet.

Where It Lives

The Knowlton's hophornbeam loves to grow in the sunny, dry areas of the American Southwest. You can find it in interesting places, including the edges of the famous Grand Canyon!

Favorite Habitats

This tree often grows in different types of forests and woodlands:

It prefers spots that get lots of sunshine and don't have too much moisture.

Uses of the Wood

The wood from the Knowlton's hophornbeam is incredibly hard and tough. Because it's so strong, people use it to make things that need to last a long time. For example, it's great for making:

  • Fence posts, which need to stand up to all kinds of weather.
  • Tool handles, like for hammers or axes, because they need to be very durable.
Ostrya knowltonii range map
Natural range
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