Looking for relief from the sun? These seven fast-growing shade trees are perfect for creating a cooler, more comfortable backyard in a short time.

Have you noticed discoloration on your maple tree leaves this year? You aren't the only one. Here's what you should know ...

The Emerald Ash Borer, an invasive species of bark beetle that was discovered in Colorado in 2013 and has been expanding through the state, has the potential to damage the Colorado landscape. And ...

The team also discovered that natural selection is acting upon thousands of locations within the ash tree DNA, driving the ...

What is the largest organism? Until a few years ago, Oregon’s “humongous fungus” was considered the world’s largest organism.

Aspen trees are vulnerable to infection from a number of sources. Common problems include fungal diseases like Cytospora, leaf spots, and other cankers that can cause trunk rot.

Wildlife is eating Earth’s largest and oldest organism, the Pando aspen tree in Fishlack National Forest in Utah. Credits: Public Domain, via Wikimedia Commons. Wildlife is eating alive Earth’s ...

Aspen Canker Greg Blick / Flickr / CC BY-NC-ND 2.0 Quaking aspen (Populus tremuloides Michx.) is one of the most well-known and widespread tree species in the western United States.

The aspen bracket fungus (Phellinus tremulae) is host-specific to aspen trees, causing heart rot in the trunks and producing large distinctive brackets that can persist for years.

A recent DNA analysis of hundreds of tree samples suggested Pando is between 16,000 and 80,000 years old, making it one of the oldest living organisms in the world — although that research ...

A large swath of dead trees along Stewart Creek near the trail to San Luis Peak, one of Colorado's 14ers, in the San Luis Mountains. “So that adds to complexity about what can we do with the ...