Norway maple leaf type10/30/2023 ![]() However, the traditional uses of maples have been recorded primarily in local herbal books or have been orally passed down from one generation to another.Īn incredible 331 compounds have been identified from thirty-four maple species. Over the years, medicinal values of the maple genus have been shown to detoxify, treat rheumatism, bruises, eye disease, and pain. Several maple species have been used in traditional medicine in East Asia (China, Japan, and Korea) and North America, such as Acer negundo, Acer pensylvanicum, Acer rubrum, Acer saccharinum, and Acer tegmentosum. Recently, the seed oil of certain maple species, such as the Norway maple ( Acer platanoides) and the sycamore maple ( Acer pseudoplatanus), was found to be a good source of gamma-linolenic acid, a dietary supplement beneficial in treating a wide variety of human diseases, including cardiovascular diseases and cancer. Many maple varieties have been found to contain a large number of phytochemicals and several beneficial properties such as antioxidant, anti-tumor, and anti-inflammatory activities. The chemical composition and pharmacological activities of this genus have been studied for years by many researchers. The leaves of many maple species are not only edible, but healthy for us. It is obtained from the sap collected from certain Acer species, such as the sugar maple ( Acer saccharum), the black maple ( Acer nigrum), and the red maple ( Acer rubrum). Maple syrup, which is native to North America, has been historically used as a natural sweetener the world over. They are commonly used in commercial products, such as furniture and lumber. ![]() Especially obvious in wet summers, Norway maple is susceptible to infection by a fungus called tar spot Rhytisma acerinum which is ugly but not usually damaging to the tree.Maple trees have many uses from being ornamental to being a valuable source of food and medicine. It is not always fatal, but causes aesthetic problems. The wilting may be localized on one or two branches, but it may affect the entire canopy. Pests and diseases: Norway maples are susceptible to Verticillum wilt, which can cause sudden wilting of the leaves. Further, because it has shallow roots and casts a dense shade, other plants, including grass will not grow beneath it, leaving bare ground. Landscape value and potential for home plantingBecause it threatens native species and ecosystems, it is widely recommended that Norway Maple not be planted. Today it is not only the most common planted tree in Toronto parks, yards and streets, but it has also independently invaded Toronto's remaining natural ecosystems. Due to its tolerance of urban pollution, salt and other stresses it was planted by choice to replace elms destreoyed by Dutch Elm Disease in the mid 20th century. Norway maple is the dominant tree of urban forests in many North American cities, including Toronto. Norway maple's place in Toronto's urban forest Return to top of page Norway maple IN TORONTO Sugar maple bark has vertical ridges that curl on one side while Norway maple bark has shallow, intersecting ridges in a regular, often diamond-shaped pattern. Especially in winter, the two species can be distinguished by the bark. Sugar maple leaves never have 7 lobes the sap is clear, visible when the leaf stalk is broken the dangling flowers have no petals and the pairs of samara wings (keys) are nearly paralell. Norway maple is regularly confused with the native sugar maple ( Acer saccharum). There are many cultivars of Norway maple, including the popular Crimson King, which has maroon-coloured leaves. See London plane-tree page for comparison of leaf shape. The species name platanoides means resembling a plane tree ( Platanus spp), from Platanus, the classical name for plane tree and oides, meaning resembling. The genus name Acer means sharp, referring to the sharp tips of the leaf lobes of most maples. Now Norway maple has been designated an invasive species because it has encroached on natural forests where its dense shade prevents young sugar maples from growing. Tolerant of pollution and drought, by the mid 20th century it was the most frequently planted in towns and cities. By the 1800s, Norway maple was a popular ornamental tree in North America. Native to Europe, Norway maple was introduced to North America around 1756 by the botanist and nurseryman John Bartram, who was central to the exchange of plant specie between Europe and North America.
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