They are found in many types of forests, valleys and along rivers, often in big groups mixed with quaking aspen.
The bark is green in young trees, turning brown and ridged as the tree gets older. Leaves are 2 - 4 inch long ovals with large rounded teeth. These teeth are bigger than the teeth on the quaking aspen leaves. The leaves have a flat stem that makes them shake (quake) in a breeze. Flowers are catkins that turn to cottony seeds.
