Hard Maple, Rock Maple
(Acer saccharum Marshall)
Sugar maple is a magnificent forest tree abundant everywhere in the State outside of Long Island. Besides providing beautiful borders to many miles of highway, and hundreds of thousands of gallons of maple syrup, it yields a wood of high grade. The wood is hard, strong, close-grained, and tough, with a fine, satiny surface. It is in great demand for flooring, veneer, interior finish, furniture, shoe lasts, rollers, and as a fuel wood of the best quality.
Leaves - simple, opposite, from 3 to 5 inches long and fully as wide, from 3-5 shallow lobes with wide-spaced coarse teeth, dark green in color above, paler below; the clefts are rounded at the base. Leaf edge is smooth between the points The leaf stalk (petiole) is typically equal in length or shorter than the leaf blade.
Courtesy of: http://maple.dnr.cornell.edu/kids/tree_sug.htm
For more information on the sugar maple: http://maple.dnr.cornell.edu/pubs/trees.htm