The Salicaceae Family includes several notable genres of trees including the Poplar, Aspen, Willow and Cottonwood.
Aspen groves are always a favorite subject of photographers. Aspen have a unique ability to glisten. The aspen leaves turn a bright yellow in the Fall. Usually an entire colony will change color at the same time making for uniform colors or defined splotches of color on mountainsides.
Cottonwoods are a fast growing tree. They are noted for their ability to survive in extremely hot dry climates. You will often find lone groves of Cottonwood growing along watering holes of the desert.