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Bigtooth aspen identification: leaves, bark, fruit and twigs
Bigtooth aspen, Populus grandidentata, is a native tree in Pennsylvania. How to recognize it by its leaves, bark, fruit and twigs, and how to tell it from look-alikes.
Alternate, simple leaves with toothed edges. Round to oval leaves 3 to 4 inches long with big, blunt teeth on a flattened leaf stem. Bark: Smooth olive-green to milky green when young; later gray-brown and ridged. Checked Nov. 14, 2026.
How to identify bigtooth aspen
| Leaf type | Alternate, simple leaves with toothed edges |
|---|---|
| Leaves | Round to oval leaves 3 to 4 inches long with big, blunt teeth on a flattened leaf stem. |
| Bark | Smooth olive-green to milky green when young; later gray-brown and ridged. |
| Fruit | Cottony seeds in small capsules along hanging catkins, late spring to early summer. |
| Twigs | Gray-brown twigs with pointed red-brown to gray buds. |
| Size and shape | Straight trunk with a thin, irregular crown. |
From the Virginia Tech Dendrology fact sheet, in our own words.
Is bigtooth aspen native to Pennsylvania?
The Pennsylvania Natural Heritage Program (PNHP) lists bigtooth aspen as native to Pennsylvania.
See all 140 trees, with a 4-question identifier, in our Pennsylvania tree identification guide.
Trees that look like bigtooth aspen
| Tree | Its leaves |
|---|---|
| White poplar Populus alba | Alternate, simple leaves with lobes. Leaves 2 to 4 inches long, coarsely toothed and sometimes lobed like a maple, shiny green on top and white and woolly underneath. |
| Quaking aspen Populus tremuloides | Alternate, simple leaves with toothed edges. Small heart-shaped to nearly round leaves 1 to 3 inches long with fine teeth on a flattened stem, so they shake in the slightest breeze. |
| Balsam poplar Populus balsamifera | Alternate, simple leaves with toothed edges. Finely toothed oval leaves 3 to 6 inches long, shiny dark green on top and paler, often with orange blotches, underneath. |
| Eastern cottonwood Populus deltoides | Alternate, simple leaves with toothed edges. Triangular leaves 3 to 6 inches long with rounded teeth; the leaf stem is flattened and has small glands at the top. |
Compare the leaves first, then the bark, fruit and twigs on each tree’s page.
Other poplars, aspens and cottonwoods in Pennsylvania
Swamp cottonwood (Populus heterophylla), Lombardy poplar (Populus nigra).
Questions
How do you identify bigtooth aspen?
Look for alternate, simple leaves with toothed edges. Round to oval leaves 3 to 4 inches long with big, blunt teeth on a flattened leaf stem. Bark: Smooth olive-green to milky green when young; later gray-brown and ridged.
Is bigtooth aspen native to Pennsylvania?
The Pennsylvania Natural Heritage Program (PNHP) lists bigtooth aspen as native to Pennsylvania.
What shape is bigtooth aspen?
Straight trunk with a thin, irregular crown.
How can you tell bigtooth aspen in winter?
Check the twigs and bark. Twigs: Gray-brown twigs with pointed red-brown to gray buds. Bark: Smooth olive-green to milky green when young; later gray-brown and ridged.
What tree looks like bigtooth aspen?
White poplar, Quaking aspen, Balsam poplar, Eastern cottonwood. Compare the leaves first.
Sources: Virginia Tech Dendrology (Populus grandidentata fact sheet); Pennsylvania Natural Heritage Program, PA Vascular Plant List (native or introduced status). Checked Nov. 14, 2026.
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