• Photo of early morning clouds hanging low in the valley with mountains of the Continental Divide stretched out above. NPS Photo/Schonlau

    Rocky Mountain

    National Park Colorado

Trees in Winter

a photo of fall aspen leaves
Aspens (Populus tremuloides) lose their leaves in winter and must grow new ones in the spring to be able to photosynthesize.
Photo courtesy of and copyrighted by Ernie Bernard.
 
a photo of Englemann spruce
An Engelmann spruce (Picea engelmannii) keeps its needles all winter to be able to photosynthesize quickly in Rocky Mountain National Park.
Photo courtesy of and copyrighted by Ernie Bernard.

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