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The base of a Yellow Birch trunk. In botany, the trunk (or bole) is the stem and main wooden axis of a tree, [1] which is an important feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production.
This dead layer is the rough corky bark that forms around tree trunks and other stems. Cork, sometimes confused with bark in colloquial speech, is the outermost layer of a woody stem, derived from the cork cambium .
The trunk is usually about 60 centimetres (24 inches) thick. [4] The thin bark is a rich orange-red, and when mature naturally peels away in thin sheets, leaving a greenish, silvery appearance that has a smooth satin sheen. [5] Older trunks are gray-brown near the base. [4] Individual trees can live for over 300 years. [4]
Tree rings are the basis of dendrochronology, which dates wooden objects and associated artifacts. Dendroclimatology is the use of tree rings as a record of past climates. The aerial stem of an adult tree is called a trunk. The dead, usually darker inner wood of a large diameter trunk is termed the heartwood and is the result of tylosis. The ...
A branch collar is the "shoulder" between the branch and trunk of woody plants; the inflammation formed at the base of the branch is caused by annually overlapping trunk tissue. [1] The shape of the branch collar is due to two separate growth patterns, initially the branch grows basipetally, followed by seasonal trunk growth which envelops the ...
A transverse section through a tree trunk or a horizontal core will show concentric circles of lighter or darker wood – tree rings. [68] These rings are the annual growth rings [69] [70] There may also be rays running at right angles to growth rings. These are vascular rays which are thin sheets of living tissue permeating the wood. [68]
Water could be obtained from the tree roots by boring a hole in the trunk and squeezing the wood. [4] There are also records of the seed pods being turned into a children's rattle or toy. The soft, spongy wood was used for making shields, and the bark as a fibre. The leaves are also used as emergency fodder for drought-affected animal stock.
Melaleuca quinquenervia, commonly known as the broad-leaved paperbark, paper bark tea tree, punk tree or niaouli, is a small- to medium-sized tree of the myrtle family, Myrtaceae. It grows as a spreading tree up to 20 m (70 ft) tall, with its trunk covered by a white, beige and grey thick papery bark.