Platanus occidentalis, also known as American Sycamore, American plane, Occidental plane, and Buttonwood, is one of the species of Platanus

Platanus

Platanus is a small genus of trees native to the Northern Hemisphere. They are the sole living members of the family Platanaceae....

native to North America. It is usually called Sycamore

Sycamore

Sycamore is a name which is applied at various times and places to three very different types of trees, but with somewhat similar leaf forms....

 in North America, a name which can refer to other types of tree in other parts of the world.
An American sycamore tree can often be easily distinguished from other trees by its mottled exfoliating bark, which flakes off in great irregular masses, leaving the surface mottled, and greenish-white, gray and brown.