Pando (tree)

Pando is a very large tree.

It looks like many trees. But they are all one. All the parts share roots. These roots connect 47,000 stems.

The tree is very heavy. It weighs millions of pounds. It can be many thousands of years old. The tree grows new parts from its roots. This helps it stay alive. People work hard to protect it.

They use fences to keep it safe.

Pando is a very special tree in Utah.

It looks like a big forest of many trees. But it is actually one single living thing. It is a clonal organism. This means all the parts are genetically identical. This happens because they share one huge root system.

Pando has about 47,000 stems. These stems look like separate trees. They are called ramets. Pando is the largest tree in the world by weight. It weighs about 13.2 million pounds. It is also the largest by landmass. Scientists think Pando is very old. Some estimates say it is 16,000 years old. Individual stems do not live very long. They usually live only 100 to 130 years. When a stem dies, the roots make a new one. This way of growing is called suckering.

People work hard to keep Pando safe. They use tall fences to protect it. These fences stop deer and elk from eating new growth. This helps the tree stay healthy for a long time.

Pando is a very special living thing found in Utah.

It is located in the Fishlake National Forest within Sevier County. While it looks like a forest, it is actually one single tree. This is called a clonal organism because all its parts are genetically identical. Pando is famous for being the largest tree in the world. It holds this title by weight and by landmass. It is also the largest aspen tree on Earth.

This massive tree works in a very unique way. It has about 47,000 stems that look like separate trees. These individual stems are called ramets. They are all connected by one huge root system. When a stem dies, the roots grow a new one. This process is called suckering. It allows the tree to keep living even as old parts die. Most stems only live for 100 to 130 years. The roots keep the whole system alive for much longer.

People first identified Pando in 1976. Jerry Kemperman and Burton V. Barnes discovered it. Later, in 1992, researchers Michael Grant, Jeffrey Mitton, and Yan Linhart studied it more. They described Pando as a single male aspen clone. Michael Grant gave the tree its name. He chose "Pando," which is Latin for "I spread." In 2008, a team of scientists used genetic sampling to prove Pando was one single organism. This confirmed everything the first researchers had found.

There are many amazing facts about Pando's size and age. It weighs an estimated 13.2 million pounds. The tree spans a huge area of land. Its height ranges from 8,900 feet to 9,098 feet above sea level. Scientists have many different ideas about how old Pando is. Some estimates say it is between 9,000 and 16,000 years old. This is because the roots are much older than the stems. It has lived through many different changes in the Earth's climate.

Protecting Pando is a very important job for many groups. People use 8-foot fences to keep deer and elk away. These animals might eat the new growth that the tree needs. In 2024, cattle grazing in the area ended to help the tree. The Fishlake National Forest works with groups like the Friends of Pando. They use tools like GPS collars and cameras to watch the wildlife. These efforts help ensure that this ancient living thing stays healthy. We can learn a lot about nature by watching how Pando survives.

Pando is a massive quaking aspen clone located in Sevier County, Utah. It lives within the Fishlake National Forest in the United States.

While it looks like a forest of many trees, it is actually a single organism. This is known as a clonal organism because all its parts are genetically identical. Pando is considered the largest tree in the world by weight and landmass. It is also the largest aspen tree, or Populus tremuloides, on Earth. Because different scientists use different rules to define a "large tree," Pando's exact status can be confusing. For example, the General Sherman Tree is larger if you only measure a single stem. However, Pando is in a class of its own due to its immense scale.

The way Pando lives is quite different from a typical tree. It consists of approximately 47,000 individual stems called ramets. These stems appear to be separate trees, but they are all connected by one vast root system.

When an individual stem dies, the root system sends up a new one. This specific process is called suckering. Most individual stems only live for about 100 to 130 years. However, the massive root system allows the entire organism to survive for much longer. This constant cycle of death and regrowth allows the tree to maintain its massive size over many centuries.

Scientists have worked for decades to understand this unique organism. Jerry Kemperman and Burton V. Barnes first identified Pando in 1976. In 1992, researchers Michael Grant, Jeffrey Mitton, and Yan Linhart re-examined the clone. They used morphological characteristics, such as pollen production and leaf structure, to describe it as a single male aspen clone. Michael Grant gave the tree the name "Pando," which is Latin for "I spread." Later, in 2008, a genetic study by Jennifer DeWoody and her team confirmed these findings. Their large-scale genetic sampling proved that Pando is indeed a single, massive biological entity.

The sheer scale of Pando is difficult to imagine. It has an estimated weight of 13.2 million pounds.

The tree spans a large area across a steep basin wall. Its elevation ranges from 2,700 meters to 2,773 meters above sea level. Determining the exact age of Pando is a complex scientific challenge. Because the stems are constantly being replaced, scientists cannot use tree rings to find the age of the whole organism. Current estimates suggest the root system is between 9,000 and 16,000 years old. Some older, unverified claims suggested the tree was much older, but climate models make those ages unlikely.

Protecting Pando is a major priority for many conservation groups. Researchers have noted that several factors could threaten its future. These include long-term droughts, fire suppression, and grazing by animals. While aspen trees are water-heavy and naturally fire-resistant, they still face risks. One major concern is herbivory, which is when animals like mule deer and elk eat the new growth. To stop this, the Fishlake National Forest installed 8-foot wildlife controls.

These fences help protect about 84 acres of the tree from being overbrowsed by deer and elk.

Management of Pando has become more organized through specific protection plans. Between 2015 and 2022, officials developed the Pando Protection Plan. This plan involved gathering feedback from many different community and land management groups. In 2024, cattle grazing in the area ended to help protect the tree. By 2025, new protections were added to bring about 80% of Pando's landmass into protective care. This includes creating management bulwarks to help control how animals move through the area. These efforts are supported by organizations like the Western Aspen Alliance and the Grand Canyon Trust.

Today, scientists use advanced technology to monitor the health of the clone. In 2023, researchers began using GPS collars and wildlife cameras to study deer and elk populations. This data helps biologists understand how to better manage the landscape. The US Forest Service also works to inventory the area as "mature" forest. This classification may allow Pando to receive even more special care and legal protections. By studying how Pando survives, scientists learn more about how large-scale biological systems respond to a changing world.