page_title: Tree
section_title: Art
hierarchical_section_title: Tree / Uses / Art
caption_attribution_description: A Dwarf Japanese Juniper (Juniperus procumbens 'Nana') bonsai on display at the National Bonsai &amp; Penjing Museum at the United States National Arboretum. According to the tree's display placard, it has been in training since 1975. It was donated by Thomas Tecza. This is the "back" of the tree. 4.20 ft tall
context_page_description: In botany, a tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world.
  A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically contains woody tissue for strength, and vascular tissue to carry materials from one part of the tree to another. For most trees it is surrounded by a layer of bark which serves as a protective barrier.
context_section_description: Besides inspiring artists down the centuries, trees have been used to create art. Living trees have been used in bonsai and in tree shaping, and both living and dead specimens have been sculpted into sometimes fantastic shapes.
caption: Informal upright style of bonsai on a juniper tree
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