Tree - Wikipedia
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. 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.
Tree - Simple English Wikipedia, the free encyclopedia
A tree is a plant form that can be found in many different orders and families of plants. Trees show many growth forms, leaf type and shape, bark traits and organs. The tree form has changed separately in classes of plants that are not related, in response to similar problems (for the tree).
Lists of trees - Wikipedia
A listing of lists of trees. List of individual trees, including actual and mythical trees; List of largest giant sequoias; List of old growth forests; List of oldest trees; List of superlative trees. List of superlative trees in Sweden; List of tallest trees; List of tree genera; List of trees and shrubs by taxonomic family
List of individual trees - Wikipedia
Trees listed here are regarded as important or specific by their historical, national, locational, natural or mythological context. The list includes actual trees located throughout the world, as well as trees from myths and religions. Map all coordinates using OpenStreetMap.
Category:Trees - Wikipedia
Trees are important components of the natural landscape and significant elements in landscaping. Compared with most other forms of plants, trees are long-lived. A few species of trees grow to over 100 m (300 ft) tall and some live for several millennia.
Tree | Definition, Structure, Uses, Importance, & Facts | Britannica
2024年11月3日 · Tree, woody plant that regularly renews its growth. Most plants classified as trees have a single self-supporting trunk containing woody tissues, and in most species the trunk produces secondary limbs, called branches. There are few organisms as important as trees for maintaining Earth’s ecology.
Oak - Wikipedia
An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen.
Pine - Wikipedia
Pine trees are evergreen, coniferous resinous trees (or, rarely, shrubs) growing 3–80 metres (10–260 feet) tall, with the majority of species reaching 15–45 m (50–150 ft) tall. [7] The smallest are Siberian dwarf pine and Potosi pinyon , and the tallest is an 83.45 m (273.8 ft) tall sugar pine located in Yosemite National Park .
Anatomy of a tree - US Forest Service
Anatomy of a tree. This information is courtesy the Arbor Day Foundation. A: The outer bark is the tree's protection from the outside world. Continually renewed from within, it helps keep out moisture in the rain, and prevents the tree from losing moisture when the air is dry.
Tree - Wikimedia Commons
2023年11月10日 · Two different types of trees, one heavily branched and pointing to all directions, the other one has all branches pointing outward and upward.