Aspen, Quaking : Populus tremuloides

Aspen trees gorw fairly straight and become clear of lower limbs over time. Sometimes called trembling aspen because their leaves tremble in a light breeze due to their flattened petioles. Most extensive native range of any tree in North America. Rapidly recolonizes disturbed sites (after fire, logging, etc.) The largest tree in North Dakota is 70 feet tall with a canopy spread of 39 feet.