Quaking aspen
Populus tremuloides
Leaves are often rounded to broadly triangular with small, fine teeth.
Compare similar trees
Quaking Aspen & Eastern Cottonwood
Both belong to Populus and can have moving leaves and pale young bark. Combine leaf shape with age-aware bark observations.
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 outline and margin
Outline varies, so compare several mature leaves. Both species can have flattened leaf stalks and moving foliage; trembling alone does not settle the identification.
Eastern Cottonwood
Populus deltoides
Leaves are commonly more distinctly triangular, with a broad, nearly straight base and coarser teeth.
Bark through time
These photographs show particular trunk ages and are not matched in scale. Young cottonwood and older aspen can defeat a bark-only guess. Recheck foliage and consult a local key; other poplars and hybrids can complicate identification.
Quaking aspen
Populus tremuloides
Much of the trunk can remain pale and relatively smooth, with dark markings; older lower bark may become rough and furrowed.
Eastern Cottonwood
Populus deltoides
Young bark may be smooth and greenish-gray, while mature trunks develop deep, interconnecting furrows and ridges.
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 · NC State Extension: Eastern Cottonwood.
Additional botanical references: Native Plant Trust: quaking aspen · Native Plant Trust: eastern cottonwood.