Populus tremuloides, the quaking aspen of the North American continent, stands as one of the most easily recognized, most beautiful and most admired of all tree species. In order to help ...

Quaking aspen (Populus tremuloides) is the most widespread tree species in North America. As a keystone species, aspen ...

Here, this lone male quaking aspen (Populus tremuloides) gradually grew into a massive 6,000 metric tons of life, making it the largest living organism in the world in terms of mass. After ...

The U.S. Postal Service celebrates the colorful sights of autumnal walks with the release of five new Vibrant Leaves postcard stamps. Each stamp showcases a single leaf from the aspen, sassafras, oak, ...