Poplar are trees that grow in Europe, North America, and other temperate regions. The bark, leaf, and dried, unopened leaf buds are used to make medicine. Poplar is used for cough, hemorrhoids ...

Quaking aspen (Populus tremuloides) and balsam poplar (Populus balsamifera) also have light-colored bark and can thrive at this northern edge. Some species with light bark have the added advantage of ...