Quaking Aspen (Populus tremuloides) tree seeds are small, light, and typically have a fluffy, cotton-like structure that helps them disperse easily in the wind. The seeds are produced in slender catkins and can range in color from pale tan to light brown. Quaking Aspen trees are known for their beautiful white bark and vibrant yellow foliage in the fall. They thrive in clusters and are often found in cool, moist environments. The seeds germinate quickly, making them a popular choice for tree enthusiasts and gardeners interested in growing these fast-growing and resilient trees.