Microsoft-Windows-Vista Certification Exam 70-620
The silver maple has brittle wood, and is commonly damaged in storms. The roots are shallow and fibrous and easily invade septic fields and old drain pipes and can also crack sidewalks and foundations. It is a vigorous resprouter, and if not pruned, it will often grow with multiple trunks. It is, nonetheless, widely used as an ornamental tree because of its rapid growth and ease of propagation and transplanting. It is highly tolerant of urban conditions, which is why it is frequently planted next to streets. Although it naturally is found near water, it can grow on drier ground if planted there.It is also commonly cultivated outside its native range, showing tolerance of a wide range of climates, growing successfully as far north as central Norway and south to Orlando, Florida. It can thrive in a Mediterranean climate, as at Jerusalem and Los Angeles, if summer water is provided. It is also grown in temperate parts of the Southern Hemisphere, as in Argentina and Uruguay. The silver maple is Testking 70-640 closely related to the red maple, and can hybridise with it, the hybrid being known as the Freeman maple (Acer x freemanii). The Freeman maple is a popular ornamental tree in parks and large gardens, combining the fast growth of silver maple with the less brittle wood and less invasive roots of the red maple.It is a deciduous tree normally reaching heights of 25–35 m tall,and exceptionally up to 45 m (150 feet). A 10-year-old tree will be about 5 m (15 ft) tall. The leaves are deciduous, 8-15 cm long and equally wide with five palmate lobes. The basal lobes are relatively 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 fall color is often spectacular, ranging from bright yellow through orange to fluorescent red-orange. Sugar maples also have a tendency to color unevenly in fall. In some trees, all colors above can be seen at the same time. There is also a tendency, as there is also with Red Maples (A. rubrum) Testking 70-620 to see a certain part of a mature tree change color weeks ahead of or behind the remainder of the tree. The leaf buds are pointy and brown colored. The recent years growth twigs are green, and turn dark brown. 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 seeds fall from the tree in autumn. It is closely related to the Black Maple, which is sometimes included in this species but sometimes separated as Acer nigrum. The western American Bigtooth Maple (Acer grandidentatum) is also treated as a Testking 70-528 variety or subspecies of Sugar Maple by some botanists. The Sugar Maple is also often confused with the Norway Maple, though they are not closely related within the genus. The Sugar Maple is most easily identified by clear sap in the leaf petiole (the Norway Maple has white sap), brown sharp-tipped buds (the Norway Maple has blunt green or reddish purple buds), and shaggy bark on older trees (the Norway Maple bark has small grooves). Also, the leaf lobes of the Sugar Maple have a more triangular shape, in contrast to the squarish lobes of the Norway Maple.