Quaking aspens store chlorophyll beneath their bark (particularly in younger trees), this is what gives the trunk a greenish cast. This helps them to continue to produce sugars, at least when the days ...

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 ...

The quaking aspen is the most widespread species of tree ... Although aspens do produce pollen and eggs in their flowers, meaning they are technically capable of sexual reproduction, they tend ...