Trees of Wisconsin

Populus grandidentata Michx.
big-tooth aspen
Family: Salicaceae
tree leaves male aments female aments twig bark
Populus granditata is relatively easy to identify by the large teeth of the leaves and the buds covered by whitish pubescence. All other Populus species in Wisconsin have glabrous (hairless) buds. The leaves are simple alternate and conspicuously covered by dense whitish hairs when they first open in the spring, and the trees are very easy to identify from a considerable distance during that brief time. The leaves become glabrous when mature. The bark of young trunks is similar to the pale greenish white color of other members of this genus. When the trees reach a large size the older bark splits repeatedly and becomes furrowed and dark gray. As is the case with all our trees in the genus Populus, the leaves are bright yellow in Autumn.

Populus grandidentata ranges from the maritime provinces of Canada to Minnesota, south through Iowa to Tennessee and North Carolina. It is distributed throughout Wisconsin. It begins to flower in April in the Green Bay area, within a few days after Populus tremuloides starts.

known Wisconsin distribution


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