Populus tremuloides

Found: dispersed throughout the northern United States

Height: up to 18 meters (60 feet)

Leaves: generally round and smooth with fine teeth. Flattened leafstalks cause the leaves to sway in even the gentlest breeze.

Uses: The bark of the quaking aspen contains salicin, which is similar to aspirin. It is anti-inflammatory and an analgesic and can also be used to reduce fevers.