How to Identify a Sycamore Tree
Sycamore trees are hard to miss once you know what to look for. The mottled, peeling bark that reveals patches of white, cream and tan is unique among large trees, and the broad leaves and hanging seed balls confirm the identification.
The bark: the most reliable feature
Sycamore bark is the most distinctive of any large tree in temperate regions. The outer bark peels away in irregular flakes, exposing smooth inner layers in white, cream, light green and tan. The result is a camouflage-pattern trunk that is essentially unmistakable. On older trees the lower trunk may develop gray, furrowed bark, but the upper trunk and branches keep the characteristic patchwork.
Leaves
American sycamore (Platanus occidentalis) leaves are large, three to five lobed, and superficially similar to maple leaves. Key differences from maple: sycamore leaves alternate along the stem (maple leaves are opposite), and sycamore leaf bases are broad and flat where the leaf meets the stem.
- Leaf size: typically 15 to 25 cm (6 to 10 inches) wide.
- Shape: three to five shallow lobes, with large teeth.
- Underside: often slightly hairy, especially along the veins.
- Autumn color: yellow-brown rather than the bright reds and oranges of true maples.
Seed balls
Sycamores produce round, bristly seed balls about 2.5 cm (1 inch) in diameter that hang from the tree through winter on long, flexible stalks. American sycamore usually produces one ball per stalk; the London plane tree (a common street tree hybrid) typically produces two. These seed balls are a reliable winter identification feature when leaves are absent.
European sycamore vs American sycamore
In the UK and Europe, the tree called sycamore is Acer pseudoplatanus, a maple with similar leaf shape but completely different bark (gray and furrowed, not patchy) and winged seeds (helicopters or samaras) rather than seed balls. The name sycamore in a European context always refers to this maple, not to Platanus.
Similar trees to compare
- Maple: opposite leaves, winged seeds, smooth or furrowed bark without the peeling patches.
- London plane: very similar to American sycamore; most reliably distinguished by multiple seed balls per stalk (usually two on London plane) and slightly more deeply lobed leaves.
- Cottonwood: similar leaf shape in some species, but bark is deeply furrowed and there are no hanging seed balls.
Never eat any part of a tree based solely on a visual identification, however confident you are. Canopy helps you identify trees by their visual features. For related identification guidance, see the article on identifying trees by bark.
Common questions
- What does a sycamore tree look like?
- A sycamore has distinctively patchy, peeling bark that shows white, cream and tan patches on the trunk and upper branches. The leaves are large (up to 25 cm wide), maple-shaped with three to five lobes, and alternate along the stem. Round, bristly seed balls hang from the branches through winter.
- Are sycamore trees the same in Europe and North America?
- No. In North America, sycamore refers to Platanus occidentalis or related species, with distinctive patchy bark and round seed balls. In the UK and Europe, sycamore refers to Acer pseudoplatanus, a maple with furrowed bark and winged seeds. The two are unrelated despite sharing the common name.
- How do I tell a sycamore from a maple?
- Look at the bark and seeds. American sycamore has patchy, peeling bark and round hanging seed balls. Maples have smooth or furrowed bark (not patchy) and winged samaras (helicopter seeds). Sycamore leaves also alternate along the stem while maple leaves are opposite.