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The Ulmus americana is commonly known as the American Elm. The Ulmus americana has Green foliage and inconspicuous Green flowers, with inconspicuous Brown fruits or seeds. The greatest bloom is usually observed in the Early Spring, with fruit and seed production starting in the Spring and continuing until Spring. Leaves are not retained year to year. The American Elm has a Moderate life span relative to most other plant species and a Rapid growth rate. At maturity, the typical American Elm will reach up to 120 feet high, with a maximum height at 20 years of 120 feet. http://www.sd72.bc.ca/elmstreet/Web%20Page%20Stuff/AmericanElm3d.jpg //**Acer saccharum**// (**Sugar Maple**) is a species of Maple native to the hardwood forests of northeastern [|North America], from [|Nova Scotia] west to southern [|Ontario], and south to [|Georgia] and Texas. || Sugar Maple is the most common maple in the east and is a hard-wooded tree with a moderate to slow growth rate. The tree will be 60 to 80 feet tall at maturity in landscape plantings. Sugar Maple grows about 1 foot each year in most soils but is sensitive to reflected heat, and to drought, turning the leaves brown (scorch) along their edges. PLANTS contains an expanded data set of Conservation Plant Characteristics that are primarily used to support the [|VegSpec] application, a web-based decision support system that helps land managers plan and design natural resource conservation plantings. PLANTS Characteristics contains about [|one hundred plant characteristics] ranging from growth form and growth requirements to suitability for various uses. PLANTS Characteristics have been compiled for over 2,000 species and an additional 500 cultivars from the scientific literature, gray literature, agency documents, and the knowledge of plant specialists. Characteristics data values are best viewed as approximations since they are primarily based on field observations and estimates from the literature, not precise measurements or experiments. If you think the data can be improved, please contact the Data Steward. ||  ||
 * **Student Name** || **Broadleaf deciduous large** || **Familiar Tree Name** || **NYC Total** ||
 * Meghan || Ulmus americana ||  || 5,441 ||
 * Jarlene || Acer saccharum ||  || 4,455 ||
 * [[image:file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/moz-screenshot.jpg]][[image:file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/moz-screenshot-1.jpg]]
 * Miriam || Robinia pseudoacacia ||  || 4,342 ||
 * || Psseudoacacia:Commonly known as the as the Black Locust.

[] || Acer pseudoplatanus is a large tree, more commonly known as the Sycamore Maple. The undersides of the leaves are purple but green on top. Young foliage is pink then becomes yellowish-green. There are also dark green leaves, which have good salt tolerance. Acer pseudoplatanus is a fast-growing, pyramidal tree. http://www.centralpark2000.com/assets/trees/Sycamore-Maple-P0003983.jpg
 * Meghan || Acer pseudoplatanus ||  || 4,085 ||
 * Miriam || Quercus phellos ||  || 2,137 ||
 * Quercus phellos trees are one of the most popular trees for street, parks, estates, and residential properties.The quercus phellos is grown as far north as Cape Code with reasonable success.

Quercus Phellos Trees are beautiful oak specimens. This oak is a relatively fast growing oak tree, growing about 2’ a year. The tree has moderate water requirements and has a moderate tolerance to salt and alkali soils. Quercus Phellos leaves have a fall color that is yellow to yellow-brown. This tree is a good street tree because it is tolerant of heat, drought, air pollution and standing water. The tree's acorns are a good food source for birds and squirrels. The small leaves are easy to clean up in the fall.

[] || Quercus alba, commonly known as the White Oak, is one of the pre-eminent hardwoods of eastern North America. Normally not a very tall tree, typically 65-85 feet (19.5-25.5 m) tall at maturity, it nonetheless becomes quite massive and its lower branches are apt to reach far out laterally parallel to the ground.
 * Jarlene || Ulmus parvifolia ||  || 1,973 ||
 * Meghan || Quercus alba ||  || 1,656 ||
 * Meghan || Quercus alba ||  || 1,656 ||

The bark is a light ash-gray and somewhat peeling, variously from the top, bottom and/or sides. A very distinguishing feature of this tree is that a little over half way up the tree the bark tends to become platy, that is that it looks sort of like overlapping scales that are easy to see and make this tree easy to identify. In spring the young leaves are a silvery pink.The petioles are short, and the leaves which cluster close to the ends of the shoots are pale green and downy with the result that the entire tree has a misty, frosty look which is very beautiful. The leaves usually turn red or brown in autumn, but depending on climate, site, and individual tree genetics, some trees are nearly always red, or even purple in autumn, others turn straight to a brown. Some brown, dead leaves may remain on the tree throughout winter until very early spring. They are variably lobed; sometimes the lobes are shallow, extending less than half-way to the midrib, but sometimes they are deeply lobed, with the lobes somewhat branching. Bark: Light gray, varying to dark gray and to white; shallow fissured and scaly. Branchlets at first bright green, later reddish-green and finally light gray.

http://upload.wikimedia.org/wikipedia/en/e/ea/Ancient_Oak.jpg

Celtis occidentalis is a large tree with a slender trunk, rising to the height of one hundred and thirty feet. It is known as the he Common hackberry
 * Meghan || Celtis occidentalis ||  || 1,652 ||

It has an unmistakable bark pattern. The bark is light brown or silvery gray, broken on the surface into thick appressed scales and sometimes roughened with excrescenses. Branchlets slender, light green at first, finally red brown, at length become dark brown tinged with red. The leaves alternate, ovate to ovate-lanceolate, more or less falcate, two and a half to four inches (102 mm) long, one to two inches wide, very oblique at the base, serrate, except at the base which is mostly entire, acute. Three-nerved, midrib and primary veins prominent. They come out of the bud conduplicate with slightly involute margins, pale yellow green, downy; when full grown are thin, bright green, rough above, paler green beneath. In autumn they turn to a light yellow. Petioles slender, slightly grooved, hairy. Stipules varying in form, caducous.

http://www.huntersville.org/interactive%20ordinance/IMAGES/CommonHackberry.jpg

History: Tree-of-heaven was first introduced to America by a gardener in Philadelphia, PA, in 1784, and by 1840 was commonly available from nurseries. The species was also brought into California mainly by the Chinese who came to California during the goldrush in the mid-1800s. Today it is frequently found in abandoned mining sites there. The history of ailanthus in China is as old as the written language of the country.
 * Jarlene || Taxodium distichum ||  || 1,518 ||
 * Miriam || Ailanthus altissiama ||  || 1,459 ||
 * Tree-of-heaven, also known as ailanthus, Chinese sumac, and stinking shumac, is a rapidly growing, deciduous tree in the mostly tropical quassia family (Simaroubaceae). Mature trees can reach 80 feet or more in height. Ailanthus has smooth stems with pale gray bark, and twigs which are light chestnut brown, especially in the dormant season. Its large compound leaves, 1-4 feet in length, are composed of 11-25 smaller leaflets and alternate along the stems. Each leaflet has one to several glandular teeth near the base. In late spring, clusters of small, yellow-green flowers appear near the tips of branches. Seeds are produced on female trees in late summer to early fall, in flat, twisted, papery structures called samaras, which may remain on the trees for long periods of time. The wood of ailanthus is soft, weak, coarse-grained, and creamy white to light brown in color. All parts of the tree, especially the flowers, have a strong, offensive odor, which some have likened to peanuts or cashews.
 * Tree-of-heaven, also known as ailanthus, Chinese sumac, and stinking shumac, is a rapidly growing, deciduous tree in the mostly tropical quassia family (Simaroubaceae). Mature trees can reach 80 feet or more in height. Ailanthus has smooth stems with pale gray bark, and twigs which are light chestnut brown, especially in the dormant season. Its large compound leaves, 1-4 feet in length, are composed of 11-25 smaller leaflets and alternate along the stems. Each leaflet has one to several glandular teeth near the base. In late spring, clusters of small, yellow-green flowers appear near the tips of branches. Seeds are produced on female trees in late summer to early fall, in flat, twisted, papery structures called samaras, which may remain on the trees for long periods of time. The wood of ailanthus is soft, weak, coarse-grained, and creamy white to light brown in color. All parts of the tree, especially the flowers, have a strong, offensive odor, which some have likened to peanuts or cashews.

Tree-of-heaven reproduces both sexually (seeds) and asexually (vegetative sprouts). Flowering occurs late in the spring (June in the middle Atlantic region of eastern U.S.). The species is dioecious, with male and female flowering on separate trees. Fruits are papery, somewhat twisted, winged structures called samaras that are tan to pink-colored. Samaras occur in large clusters from September to October of the same year, and may persist on the tree through the following winter. One study reports that an individual tree can produce as many as 325,000 seeds per year. Established trees also produce numerous suckers from the roots and resprout vigorously from cut stumps.

Tree-of-heaven is a prolific seed producer, grows rapidly, and can overrun native vegetation. Once established, it can quickly take over a site and form an impenetrable thicket. Ailanthus trees also produces toxins that prevent the establishment of other plant species.

US Habitat: Tree-of-heaven is a common tree in disturbed urban areas, where it sprouts up just about anywhere, including alleys, sidewalks, parking lots, and streets. Away from cities, it is commonly seen in fields, and along roadsides, fencerows, woodland edges and forest openings. Nationally, ailanthus has become an agricultural pest and may occur as seedlings that pop up by the hundreds in recently planted fields, or as persistent thickets in rocky, untillable areas. Rapid growing, forming thickets and dense stands. Both shade and flood intolerant and allelopathic. Colonizes by root sprouts and spreads by prolific wind- and water-dispersed seeds. Viable seed can be produced by 2- and 3-year-old plants. [] ||

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