Young aspens often don't survive because of factors such as grazing elk, according to a study by Northern Arizona University ...

Essentially, the aspen forest has been littered with young trees that are not capable of growing up and reaching adulthood.

Aspen has distinctive, almost-circular leaves with flattened petioles or stems. This flattening causes the leaves to tremble ...

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 ...

More than 60 insect species are known to feed on the tree, which has leaves that flutter, even in a gentle breeze, giving it ...