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Japanese maple autumn leaves. Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1]
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This is the time in which deciduous trees begin the process of colorful changes in their foliage. In New England, a large percentage of trees produce a pigment known as an Anthocyanin, which results in brilliant reds and purples commonly seen around this time; a change that is particularly pronounced in the region's sugar maple trees. [5]
The leaves are opposite, palmately lobed with five lobes, 5 centimetres (2.0 in) to 12 centimetres (4.7 in) long and 7 centimetres (2.8 in) to 11 centimetres (4.3 in) broad, with a 3 centimetres (1.2 in) to 10 centimetres (3.9 in) petiole; the lobes are usually entire, but occasionally with a pair of teeth on the largest central lobe, and the ...
The bigleaf maple has the largest leaves of any maple, typically 15–30 cm (6–12 in) across with five deeply incised palmate lobes, with the largest running to 61 cm (24 in). [8] [9] The stems are 15–30 cm (6–12 in) long and contain milky sap. [6] In autumn, the leaves turn gold and yellow, contrasting against backdrops of evergreen ...
Acer rubrum, the red maple, also known as swamp maple, water maple, or soft maple, is one of the most common and widespread deciduous trees of eastern and central North America. The U.S. Forest Service recognizes it as the most abundant native tree in eastern North America. [ 4 ]
Norway maple, red maple and sugar maple are the species most commonly affected. The trouble often starts after insect-induced defoliation, which weakens the trees and makes them more susceptible to secondary pathogens. Early signs of decline include small or scorched foliage, and premature fall colors on some of a tree's branches.
Acer circinatum, or vine maple, is a species of maple native to northwestern North America.Vine maple typically grows as a low-elevation coastal tree in temperate areas of high precipitation such as the west coast of Oregon and northern California, as well as the temperate rainforests of Washington and British Columbia. [3]