Pando is an ancient quaking aspen tree (Populus tremuloides ... Each stem is a clone of the one next to it and originates from a single seed that started growing up to 80,000 years ago during ...

Young aspens often don't survive because of factors such as grazing elk, according to a study by Northern Arizona University researchers.

Populus tremuloides, the quaking aspen of the North American continent, stands as one of the most easily recognized, most beautiful and most admired of all tree species. In order to help ...