An American sycamore tree can often be easily distinguished from other trees by its bark which flakes off in great irregular masses. The bark of all trees has to yield to a growing trunk by stretching, splitting, or infilling; the sycamore shows the process more openly than many other trees. The explanation is found in the rigid texture of the bark tissue which lacks the elasticity of the bark of some other trees, so it is incapable of stretching to accommodate the growth of the wood underneath, so the tree sheds it off.
Leaves: Alternate, palmately nerved, broadly-ovate or orbicular, four to nine inches long and wedge-shaped at base. They come out of the stem, pale green coated with pale tone. When full grown are bright yellow green above, paler beneath. In autumn they turn brown and wither before falling. The leafs can prick animals with spreading and toothed borders.
In the picture we an see the chloroplast which are the thin black lines in the picture. We also see some Stomata which are the small openings in the leaf to let in and out gases like Oxygen and Carbon Dioxide. We can also see the watery medium in the leaf called the stroma. The American Sycamore tree is a hydrophilic plant.

American Sycamore Leaf