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Betula pendula

life science Maturity 9-11 Next article →

The silver birch is a medium-sized tree with a very special look.

Illustration Betula pendula0
Illustration Betula pendula0

It is often called the warty birch or the European white birch. This tree is famous for its white bark that peels off in thin flakes. This peeling happens because a papery tissue grows on the surface of the trunk. The twigs are very slender and often hang down toward the ground. These hanging branches are called pendulous twigs.

This tree is a pioneer species, which means it is one of the first to grow on bare land. It can even sprout in places where a forest fire has happened.

There is a very interesting way that this tree grows and makes seeds. The silver birch is monoecious, which means it has both male and female parts on the same tree. These parts are called catkins. In the summer, the male catkins release pollen into the air. A single catkin can produce about 1.66 million pollen grains! The wind carries this pollen to help the tree make seeds. These seeds are very small, only 1 to 2 millimeters long. Each seed has a tiny wing to help the wind blow it far away.

Betula pendula - Childwall Woods & Fields 01
Betula pendula - Childwall Woods & Fields 01

When the seeds are ready, the whole catkin falls apart to spread them.

Scientists have studied many different types of this tree. There are three main subspecies of the silver birch. One grows in Europe and moves east toward central Asia. Another is found in eastern Asia and western North America. A third type lives in western China. People can sometimes confuse the silver birch with the downy birch. You can tell them apart by looking at their leaves. The silver birch has hairless leaves, but the downy birch has hairy leaves. The silver birch also has leaves that are shaped like triangles.

This tree grows in many different places around the world. It is native to Europe and parts of Asia, like Siberia and China. It can also be found in the mountains of Turkey and Iran. In North America, people call it the European white birch. It is considered invasive in states like Kentucky, Maryland, Washington, and Wisconsin.

Sawfly larvae on silver birch 140701 (Tony Holkham)
Sawfly larvae on silver birch 140701 (Tony Holkham)

This means it can spread very quickly in those areas. The tree likes to grow in dry, sandy soil with plenty of sunlight. It is very tough and can even grow in areas with pollution.

Many living things rely on the silver birch to survive. A birch forest provides a home for many birds, like the robin and the green woodpecker. Many insects, including beetles and moths, eat the leaves. In Germany, almost 500 different types of insects live near these trees. Humans also find many uses for the silver birch. In Finland, it is the national tree. People use the wood to make furniture, plywood, and even skis. The sap can even be used to make a sweet drink similar to maple syrup.

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🖼️ Images & Media (4)
File:Illustration Betula pendula0.jpg
Illustration Betula pendula0.jpg
File:B. pendula, Koivu Birch, end of August 2.jpg
B. pendula, Koivu Birch, end of August 2.jpg
File:Betula pendula - Childwall Woods & Fields 01.jpg
Betula pendula - Childwall Woods & Fields 01.jpg
File:Sawfly larvae on silver birch 140701 (Tony Holkham).JPG
Sawfly larvae on silver birch 140701...
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