Populus grandidentata Michx.
Family: Salicaceae
big-tooth aspen, large-toothed aspen
[Populus grandidentata var. angustata Michx.,  more...]
Populus grandidentata image
Robert W. Freckmann  
Populus grandidentata image
Matthew L. Wagner  
Populus grandidentata image
University of Wisconsin - Madison (WIS-VP)  
Etymology: Populus: Latin for "poplar," derivation obscure
Plants: perennial tree with greenish-gray bark that darkens and furrows with time
Leaves: hairy when young becoming dark green on top and pale beneath; roundish to kidney-shaped; large teeth
Flowers: 2"-3" long, hanging catkin
Habitat: moist; streambanks, upland woods, often in burned or cut-over areas
Conservation Status: Native - potentially invasive
Dry to dry-mesic forests of oak, oak-pine, sugar maple-basswood, oak-aspen-red maple, oak-hickory, oak-red cedar, sugar maple-beech, oak-sugar maple, aspen-elm-birch-maple-balsam fir, hemlock-hardwoods, pine-red maple-spruce-oak-balsam fir. Pine relicts, pine barrens, rock outcrops, cliffs, blufftops, clearings, lakeshores, sandspits, old quarries, along roadsides and railroads, rock ledges along rivers, lake bluffs, wooded Lake Michigan dunes, jack pine savannas, invading prairies and oak savannas.

Populus grandidentata often grows with P. tremuloides and the two sometimes hybridize to form P. × smithii B. Boivin. The hybrids have more numerous, smaller, and more rounded teeth than P. grandidentata (Barnes, 1961) but have so far not been collected in Wisconsin. If leaves are not readily available, bark color of our two native aspens can be diagnostic. Bark of younger trunks of P. tremuloides is white while that of P. grandidentata is greenish or yellowish-gray. See also P. alba.

Populus grandidentata image
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Robert W. Freckmann  
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Matthew L. Wagner  
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Populus grandidentata image
Populus grandidentata image
Matthew L. Wagner  
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Know Your Trees  
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