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Ulmus rubra

life science Maturity 7-9 Next article →

The slippery elm is a medium-sized tree found in eastern North America. It has many different names, such as red elm, gray elm, or moose elm.

Moose elm sections
Moose elm sections

This tree is easy to recognize by its reddish-brown heartwood. Its leaves are broad and oblong in shape. They feel rough on the top side but velvety underneath. In the spring, the leaves often have a red tint. By summer, they turn dark green, and they become a dull yellow in the autumn.

This tree has a very interesting way of growing and spreading. In early spring, it produces small flowers before the leaves appear. These flowers grow in tight clusters of 10 to 20. They do not have petals, so they rely on the wind for pollination.

After the flowers, the tree grows fruit called samaras. These are oval-shaped seeds with thin wings. Each single seed in the center is covered in red-brown hairs. This helps the seeds move through the air.

People have studied this tree for a long time. It was first named as part of the American elm in 1753. Later, a botanist from Pennsylvania named Gotthilf Muhlenberg identified it as its own species in 1793. Another botanist, André Michaux, gave it the name Ulmus fulva in 1803. This name is still used today for many dietary supplements.

The tree was even brought to Europe in 1830, though it did not grow well in the UK.

Many parts of the tree are useful for different jobs. The inner bark is slimy, which is why it is called slippery elm. Native Americans ate this bark raw or boiled, and it can be made into tea. People use it as a demulcent, which is something that soothes irritated skin or throats.

The wood is also quite special. It is very shock resistant because the grain of the wood locks together. This makes it good for making wagon wheel hubs or even archery bows. Some people even used tablets made from it to help baseball pitchers.

Today, we can find these trees in many places from North Dakota to Florida. They like to grow in moist uplands, but they can live in drier soil too.

In the central United States, they sometimes mix with the Siberian elm. This creates a group of plants called Ulmus × intermedia. Some very large trees exist, including a national champion in Kentucky. There is also a famous tall tree in the Bronx, New York. These trees are important parts of the forests they call home.

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