Photographer: Art Wolfe
This grove of trembling aspens is also at its southern limit, requiring an environment that is not too hot in the day and is cold at night. The likelihood is that all the trees in this image are genetically identical, being clones of each other that have originally extended through roots throwing up new suckers. Aspens typically replicate in this way, and rarely through seed.
From The Life & Love of Trees by Lewis Blackwell. Image © Art Wolfe