This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Characters of the order. Name from broad, in allusion to the foliage.
1. P. orientalis. Common Plane. - The forms of this beautiful tree are very numerous, differing chiefly in the shape and lobing of the leaves. The variety acerifolia is one of the commonest in cultivation, frequently bearing the erroneous name of P. occidentalis. It is the form known as the London Plane, on account of its being generally planted in the parks. An erect-growing tree with usually three-lobed leaves, or if 5-lobed less deeply so than in the typical form. The typical orientalis is a more spreading tree with very large deeply 5-lobed leaves, cordate or truncate at the base. The variety cuneata has the leaves distinctly wedge-shaped at the base; laciniata very deeply much divided leaves; and variegata variegated foliage.
2. P. occidentalis. American Plane. - This differs from the last in its less deeply lobed more coriaceous pubescent leaves, and in the fertile catkins being usually solitary on the long peduncles. It is very rare in British gardens, and not so hardy the Common Plane.