Common Names: American planetree, buttonwood, American sycamore, buttonball, and buttonball-tree. Habitat: America's largest broadleaf tree. It is a fast-growing and long-lived tree of lowlands and old fields. Description: Sycamore (Platanus occidentalis) is a common tree and one of the largest in the eastern deciduous forest.
The London Plane is of hybrid origin – it is the offspring of two different species, the American sycamore (Platanus occidentalis) and the Oriental plane (Platanus orientalis), and it is a tree that did not exist prior to European colonization of the new world.
Within subgenus Platanus, genetic evidence suggests that P. racemosa is more closely related to P. orientalis than it is to the other North American species. There are fossil records of plane trees as early as 115 million years (the Lower Cretaceous).
About Western Sycamore (Platanus racemosa) Western Sycamore is a species of plane tree known by several other common names, including California sycamore, California plane, and Aliso. It is native to California and Baja California, where it grows in canyons, floodplains, and along streams in several types of habitat.