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In botany and horticulture, deciduous plants, including trees, shrubs and herbaceous perennials, are those that lose all of their leaves for part of the year. [6] This process is called abscission. [7] In some cases leaf loss coincides with winter—namely in temperate or polar climates. [8]
It also may not affect the entire tree; sometimes leaves persist only on scattered branches. [4] Marcescence is most obvious in deciduous trees that retain leaves through the winter. Several trees normally have marcescent leaves such as oak ( Quercus ), [ 5 ] beech ( Fagus ) and hornbeam ( Carpinus ), or marcescent stipules as in some but not ...
Over their 40-year lifetime, the trees — a mix of oaks, pines and cypress — will capture about 28 million gallons of rainfall and prevent 3.7 million gallons of runoff, according to the county.
Some trees may be rejuvenated by pollarding – for example, Bradford pear (Pyrus calleryana 'Bradford'), a flowering species that becomes brittle and top-heavy when older. [citation needed] Oaks, when very old, can form new trunks from the growth of pollard branches; that is, surviving branches which have split away from the main branch naturally.
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Girdling is commonly used on grape, avocado, apple, litchi, mango, citrus and other trees. Girdling is normally only done to healthy trees that did not yield well the previous year. Care must be used not to damage sapwood that may kill the tree or vine. Trees normally heal in four to five weeks after cincturing.
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If wood begins to rot it could create a weak branch connection between the developing suckers and the main tree leading to a possible branch failure. If a tree is unable to compartmentalize the fungi, it may reach the trunk and ultimately kill the tree. [4] Aesthetics is another reason why people hire arborists to top their trees.