Trees

thumb|upright=1.4|The Amazon rainforest alongside the [[Solimões River, a tropical rainforest. These forests are the most biodiverse and productive ecosystems in the world.]] thumb|upright=1.4|Proportion and distribution of global forest area by climatic domain, 2020

Fraxinus (), commonly called ash, is a genus of plants in the olive and lilac family, Oleaceae, and comprises 45–65 species of usually medium-to-large trees, most of which are deciduous (dropping their leaves in autumn), although some subtropical species are evergreen. The genus is widespread throughout much of Europe, Asia, and North America.

species of ginkgo tree

thumb|260px|Bonsai, named "Kenshin Tōge" (). Japanese yew (Taxus cuspidata) presented by [[Uesugi Kenshin to Nagao Masakage. The tree is estimated to be about 800 years old.]] thumb|Bonsai at the Omiya Bonsai Art Museum thumb|Bonsai at the National Bonsai & Penjing Museum at the United States National Arboretum

right|300px|thumb|A Abies alba|silver fir shoot showing three successive years of retained leaves thumb|304x304px|Cupressus sempervirens (Mediterranean cypress), an evergreen tree In botany, an evergreen is a plant which has foliage that remains green and functional throughout the year. This contrasts with deciduous plants, which lose their foliage completely during the winter or dry season. Consisting of many different species, the unique feature of evergreen plants lends itself to various environments and purposes.

thumb|Apple orchard lanes with apples fallen off the trees thumb|Meadow orchard (Streuobstwiese) with view to the thumb|Apple orchards after snowfall in Sangla, India

small remaining portion of a tree trunk with the roots still in the ground

edge of the habitat at which trees are capable of growing

thumb|upright|Sap droplets of Dracaena trifasciata

any tree that has wide leaves

tree which bears fruit that is consumed or used by humans and some animals

Ecosia (derived from "eco" and "utopia") is a non-profit tech organisation based in Berlin, Germany. It runs its namesake internet search engine, which launched on 7 December 2009 to coincide with UN climate talks in Copenhagen. More recently the organisation has launched additional products such as a namesake web browser.

small group of trees

right|thumb|An arborist practicing [[tree care: using a chainsaw to fell a eucalyptus tree in a park at Kallista, Victoria.]]

Coppicing is the traditional method in woodland management of cutting down a tree to a stump, which in many species encourages new shoots to grow from the stump or roots, thus ultimately regrowing the tree. A forest or grove that has been subject to coppicing is called a copse or coppice, in which young tree stems are repeatedly cut down to near ground level. The resulting living stumps are called stools. New growth emerges, and after a number of years, the coppiced trees are harvested, and the cycle begins anew. Pollarding is a similar process carried out at a higher level on the tree in orde

moving through trees

thumb|right|The dark horizontal lines on silver birch bark are the lenticels. A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of gymnosperms and dicotyledonous flowering plants. It functions as a pore, providing a pathway for the direct exchange of gases between the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases. The name lenticel, pronounced with an , derives from its lenticular (lens-like) shape. The shape of lenticels is one o

Penjing, also known as penzai, is the ancient Chinese art of depicting artistically formed trees, other plants, and landscapes in miniature.

Pollarding is a pruning system involving the removal of the upper branches of a tree, which promotes the growth of a dense head of foliage and branches. In ancient Rome, Propertius mentioned pollarding during the 1st century BCE. The practice has been common in Europe since medieval times, and today is used in urban areas worldwide, primarily to maintain trees at a determined height or to place new shoots out of the reach of grazing animals.

250px|right|thumb|Beech is a popular hardwood

right|thumb|200px|Burrs on a tree trunk in Norfolk, England

250px|thumb|An arborist using a chainsaw to cut a [[eucalyptus tree in a public park]] alt=Arborists in Ontario|thumb|Two arborists climbing and dismantling a Norway Maple in Ontario, Canada An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants in dendrology and horticulture.

process of transplanting tree seedlings

large, wide roots on all sides of a shallowly rooted tree

species of plant

thumb|Krummholz Pinus albicaulis in [[Wenatchee National Forest in north-central Washington, United States]] thumb|Wind-sculpted krummholz trees, Brian Booth State Park|Ona Beach, [[Oregon, United States]]

tree which, because of its great age, size or condition, or historical connection, is of exceptional cultural, landscape or nature conservation value

thumb|American beech (Fagus grandifolia) in winter thumb|Oak (Quercus) with marcescent foliage right|thumb|Typical partial marcescence on a mature beech (Fagus sylvatica) tree thumb|Red oak (Quercus rubra) leafing out before dropping marcescent leaves Marcescence is the withering and persistence of plant organs that normally are shed, and is a term most commonly applied to plant leaves. The underlying physiological mechanism is that trees transfer water and sap from the roots to the leaves through their vascular cells, but in some trees as autumn begins, the veins carrying the sap slowly close

systematic collection of information about a forested area for assessment or analysis

foliage corridor

tree grown specifically for its shade

form of tree bark damage

species of plant

fruit tree with 40 grafted Prunus varieties by Sam Van Aken on Syracuse University campus

small, dense urban forest

plant defense mechanism against wood-decay pathogens

practice of removing entire tops of trees

Sycamore is a name which has been applied to several types of trees, but with somewhat similar leaf forms. The name derives from the Ancient Greek () meaning .

species of plant

type of forest originated from seed or from planted seedlings. In contrast to a low forest

Garden alley in Rostov-on-Don, Russia

species of plant

species of plant

Genetic material of trees and shrubs

tree whose DNA has been modified using genetic engineering techniques

trees carved by Aboriginal Australians

process in tree decay

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