The base of a Yellow Birch trunk

In botany, trunk refers to the main structural member of a tree that is supported by and directly attached to the roots and which in turn supports the branches. The trunk is also often called the bole. The trunk is covered by the bark, which is an important diagnostic feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk, or bole, is the most important part of the tree for timber production. Binomial name Betula alleghaniensis Britt. ... Pinguicula grandiflora Botany is the scientific study of plantlife. ... The coniferous Coast Redwood, the tallest tree species on earth. ... Primary and secondary roots in a cotton plant In vascular plants, the root is that organ of a plant body that typically lies below the surface of the soil (compare with stem). ... Bark is the outermost layer of stems and roots of woody plants such as trees. ... Timber in storage for later processing at a sawmill Timber is a term used to describe wood, either standing or that has been processed for use—from the time trees are felled, to its end product as a material suitable for industrial use—as structural material for construction or wood...

See also

Pinus taeda cross section showing annual growth rings (Cheraw, South Carolina)

• Logging
• Plant stem
• Wood

Pinus taeda (loblolly pine) cross section, Cheraw, SC Image copyleft: Image taken by me, released under GFDL Pollinator 13:19, Jun 6, 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Pinus taeda (loblolly pine) cross section, Cheraw, SC Image copyleft: Image taken by me, released under GFDL Pollinator 13:19, Jun 6, 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Binomial name Pinus taeda The Loblolly Pine (Pinus taeda) is one of the pines native to the southeast United States. ... The growth rings of an unknown tree species, at Bristol Zoo, England. ... Cheraw is a town located in Chesterfield County, South Carolina. ... Loggers on break, c. ... A stem is the above ground axis of a vascular plant. ... WOOD is a pair of radio stations in Grand Rapids, Michigan owned by Clear Channel on the frequencies of 1300 AM and 105. ...

External links

Wikimedia Commons has media related to:

Trunks

• Inside a tree trunk from University of the Western Cape