Quaking aspen
Populus tremuloides
Leaves are often rounded to broadly triangular, with relatively small, fine teeth along the edge.
Compare similar trees
Quaking Aspen & Bigtooth Aspen
Both are aspens with alternate, toothed leaves. Compare the size of the teeth, then look at winter bud scales when visible.
Observe from a permitted path. Use attached or naturally fallen material without picking or peeling. Photographs show individual examples, not every variation or a common scale.
Leaf margins and outline
Compare several mature leaves. Size and outline overlap, and damage can change a leaf’s edge. The large teeth on bigtooth aspen are teeth, not deep leaf lobes.
Bigtooth aspen
Populus grandidentata
Leaves have conspicuously larger, coarser teeth; the blade is often larger too.
Winter buds
These close views are not at a common scale. Fine hairs may require magnification on a naturally fallen twig or a comfortably visible branch. Do not confuse pale hairs with reflected light or remove a bud to check it.
Quaking aspen
Populus tremuloides
Winter bud scales are hairless; the buds can be pointed.
Bigtooth aspen
Populus grandidentata
Winter bud scales are hairy, offering a useful additional clue.
Look again before you decide.
These clues compare this pair; other species, hybrids, age, and growing conditions can complicate identification. If the features disagree, keep observing and consult a local field guide or knowledgeable person.
Botanical references checked October 26, 2026: NC State Extension: Quaking aspen · Native Plant Trust Go Botany bigtooth aspen profile.
Additional botanical references: Native Plant Trust: quaking aspen leaf and winter-bud characteristics · Native Plant Trust: bigtooth aspen leaf and winter-bud characteristics.