Aspen trees tend to have rough bark that ranges in color: greenish or yellowish, grey, white, or a mix. These trees are medium-sized, growing between 20 and 80 feet tall.

CRESTED BUTTE, Colo. — Aspen trees are the celebrities of a Colorado fall day. Think about it. People line the roads to take pictures with them. Instagram feeds from all over the state feature ...

Aspen trees reproduce not only by seed but also by extensive suckering. A grove of aspens in the mountains may have started as suckers off the roots of an original “mother” tree that arrived ...

Aspen trees provide a rich habitat for birds, elk, deer and other animals. The grasses that sprout under them -- up to 2,000 pounds per acre -- hold water that is needed by metropolitan areas.

Quaking aspen trees generally grow to a height of about 50 feet (15 m) with a spreading crown of 25 feet (7.6 m). Larger species known as "old growth aspen" that measure some 100 feet ...

Aspen trees are particularly vulnerable because they are linked together underground, so carving into one tree can potentially damage multiple trees. Additionally, aspen bark can photosynthesize ...

Aspen trees are the mostly widely distributed native tree species in North America, found throughout many northern U.S. states, the entire length of the Rocky Mountains, and a huge swath of Canada.

Aspen trees don’t have the same amount of salicylates as, for example, white willow, but the chemical is still present. Though used for hundreds of years, ...

To carve an aspen tree — to take a blade to the trunk for the sake of your initials, for example — is to do harm. Harm to a being with a life expectancy much like our own: 100 years, if we ...

— the most widespread tree in North America — are disappearing across the western United States. Eastern Idaho's aspen community, once estimated to cover 40 percent of eastern Idaho's forested ...

FLAGSTAFF — Beneath the scenic yellow and red leaves of soaring aspen trees in the Kachina Wilderness, forest ecologist Mike Stoddard is looking down. His concern isn’t the brilliant fall ...

FLAGSTAFF — As flurries started to descend on the forest floor, a team of researchers examined a stand of sickly quaking aspen trees off U.S. Highway 180, just north of Flagstaff.