Platanus occidentalis

Platanus occidentalis, also known as American sycamore, American planetree, occidental plane, and buttonwood, is a species of Platanus native to the eastern and central United States, extreme southern Ontario and the mountains of northeastern Mexico. It is usually called sycamore in North America, a name which can refer to other types of tree in other parts of the world.

The species epithet occidentalis is Latin for "western", referring to the Western Hemisphere, because at the time when it was named by Carl Linnaeus, the only other species in the genus was P. orientalis, native to the Eastern Hemisphere.