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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