Quaking Aspen - Populus tremuloides
The common name reflects the tendency of leaves of this species to flutter in the wind. The bark is distinctive, whitish-gray to greenish with black patches. It is a widely ranging species, growing from Alaska acoross Canada and the eastern United States, and south to Arizona. In autumn the rounded leaves turn a brilliant yellow. Quaking Aspen can behave as a disturbance species and is tolerant of a variety of soils. Clonal groups can occupy large areas, but it also grows in association with hardwoods and conifers. As with the cottonwoods, the seeds have white hairs.