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The Sugar Maple Acer saccharum is a prominent tree in the hardwood forests of eastern North America. It is the largest American maple, reaching heights of 30-37 m tall.
 Sugar Maple leaves (pen cap for scale) The leaves are deciduous, 8-15 cm long and equally wide with five palmate lobes. The basal lobes are relative small, while the upper lobes are larger and deeply notched. In contrast with the angular notching of the Silver Maple, however, the notches tend to be rounded at their interior. The flowers are in corymbs of 5-10 together, yellow-green and without petals; flowering occurs in early spring after 30-55 growing degree days. The fruit is a double samara with two winged seeds, the seeds are globose, 7-10 mm diameter, the wing 2-3 cm long.
The Sugar Maple is a favorite street and yard tree, because it is easy to propagate and transplant, is fairly fast-growing, and has beautiful, often spectacular, fall color ranging from bright yellow through orange to fluorescent red-orange. It also has some of the most dense shade to be found in shade trees. The shade and the shallow, fibrous roots may interfere with grass growing under the trees.
 Sugar Maples in fall coloration The wood is one of the hardest of the maples, and is prized for furniture and flooring. Bowling alleys and bowling pins are both commonly manufactured from sugar maple. A special type of maple, "birdseye maple" with wavy grain, is especially valued.
This tree is closely related to the Black Maple which is sometimes included in this species but sometimes separated as Acer nigrum. Both these trees are superb sources of sap for making maple syrup, with the Black Maple being regarded as being slightly the better. Almost all maples can be used as a sap source for maple syrup, but none of the others are as good as these two.
Cultivars of Sugar Maple include the tough-leaved 'Legacy' and 'Green Mountain', pyramidal 'Arrowhead', fast-growing 'Bonfire' and cutleaf 'Sweet Shadow'. 'Norselect' and 'Unity' are hardy selections suitable for the Prairie Provinces of Canada as far north as Edmonton, Alberta. Columnar varieties includee 'Columnare', 'Monumentale', 'Temple's Upright' and the very narrow 'Newton Sentry'.
See also
Trees of Canada
References
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