Populus tremuloides Michx.Most commonly Quaking Aspen leaves turn green-yellow, then yellow (often a vivid/bright yellow or gold-colored - so often described as "golden" - as in the lower right hand corner of the picture above in the background) and then the leaves fall. At one time clones that turned a vivid yellow or gold in autumn were recognized as P. tremuloides var. aurea.Sometimes there is a hint of orange-red. And, less often, the leaves can be almost red as above.Sept. 27, 2012, Brighton, Utah, elev. 8,760 ft.
