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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.
Salisburia ginkgo Rich., nom. illeg. Salisburia macrophylla Reyn. Ginkgo biloba, commonly known as ginkgo or gingko ( / ˈɡɪŋkoʊ, ˈɡɪŋkɡoʊ / GINK-oh, -goh ), [5] [6] also known as the maidenhair tree, [7] is a species of gymnosperm tree native to East Asia. It is the last living species in the order Ginkgoales, which first appeared ...
See also List of Quercus species . 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.
It is an evergreen, long-lived, monoecioustree living 1,200–2,200 years or more.[4] This species includes the tallest living treeson Earth, reaching up to 115.9 m (380.1 ft) in height (without the roots) and up to 8.9 m (29 ft) in diameter at breast height. These trees are also among the longest-living trees on Earth.
Maple flowers are green, yellow, orange or red. Though individually small, the effect of an entire tree in flower can be striking in several species. Some maples are an early spring source of pollen and nectar for bees . 3D rendering of a μCT scan of a samara. Resolution is about 45 μm/ voxel.
Quercus sada Mast. Quercus rubra, the northern red oak, is an oak tree in the red oak group ( Quercus section Lobatae ). It is a native of North America, in the eastern and central United States and southeast and south-central Canada. It has been introduced to small areas in Western Europe, where it can frequently be seen cultivated in gardens ...
Fagus grandifolia is a large deciduous tree [6] growing to 16–35 metres (52–115 feet) tall, [7] with smooth, silver-gray bark. The leaves are dark green, simple and sparsely-toothed with small teeth that terminate each vein, 6–12 centimetres ( – inches) long (rarely 15 cm or 6 in), with a short petiole. The winter twigs are distinctive ...
In computer science, a tree is a widely used abstract data type that represents a hierarchical tree structure with a set of connected nodes. Each node in the tree can be connected to many children (depending on the type of tree), but must be connected to exactly one parent, [ 1] except for the root node, which has no parent (i.e., the root node ...
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