Populus tremuloides

Aspen, a common clonal tree at high elevations, forming monoculture stands after large-scale disturbance.

A mature stand with young spruce that will eventually displace the Populus, Sangre de Christo Mts., 6/16/05.

Bark, La Sal Mountains, 6/18/06.

Leaves, La Sals, 6/18/06.