Live crown

Last updated

The live crown is the top part of a tree, the part that has green leaves (as opposed to the bare trunk, bare branches, and dead leaves). The ratio of the size of a tree's live crown to its total height is used in estimating its health and its level of competition with neighboring trees.

Tree Perennial woody plant with elongated trunk

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. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody 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. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees have been in existence for 370 million years. It is estimated that there are just over 3 trillion mature trees in the world.

Trunk (botany) main wooden axis of a tree

In botany, the trunk is the stem and main wooden axis of a tree, which is an important feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production.


Related Research Articles

<i>Acer rubrum</i> species of deciduous tree

Acer rubrum, the red maple, also known as swamp, water or soft maple, is one of the most common and widespread deciduous trees of eastern and central North America. The U.S. Forest service recognizes it as the most abundant native tree in eastern North America. The red maple ranges from southeastern Manitoba around the Lake of the Woods on the border with Ontario and Minnesota, east to Newfoundland, south to Florida, and southwest to eastern Texas. Many of its features, especially its leaves, are quite variable in form. At maturity, it often attains a height of around 30 m (100 ft). Its flowers, petioles, twigs and seeds are all red to varying degrees. Among these features, however, it is best known for its brilliant deep scarlet foliage in autumn.

<i>Agathis</i> genus of plants

Agathis, commonly known as kauri or dammar, is a genus of 22 species of evergreen tree. The genus is part of the ancient Araucariaceae family of conifers, a group once widespread during the Jurassic and Cretaceous periods, but now largely restricted to the Southern Hemisphere except for a number of extant Malesian Agathis.

<i>Quercus virginiana</i> species of plant

Quercus virginiana, also known as the southern live oak, is an evergreen oak tree native to the southeastern United States. Though many other species are loosely called live oak, the southern live oak is particularly iconic of the Old South. Many very large and old specimens of live oak can be found today in the deep southern United States.

<i>Quercus agrifolia</i> species of plant

Quercus agrifolia, the California live oak or coast live oak, is a highly variable, often shrubby evergreen oak tree, a type of live oak, native to the California Floristic Province. It grows west of the Sierra Nevada mountain range from Mendocino County, California, south to northern Baja California in Mexico. It is classified in the red oak section of oaks.

<i>Enterolobium cyclocarpum</i> species of plant

Enterolobium cyclocarpum, commonly known as guanacaste, caro caro, or elephant-ear tree, is a species of flowering tree in the pea family, Fabaceae, that is native to tropical regions of the Americas, from central Mexico south to northern Brazil (Roraima) and Venezuela. It is known for its large proportions, its expansive, often spherical crown, and its curiously shaped seedpods. The abundance of this tree, especially in Guanacaste Province, Costa Rica, where it is prized for the shady relief it provides from the intense sun, coupled with its immensity, have made it a widely recognized species. It is the national tree of Costa Rica.

<i>Xanthorrhoea</i> genus of plants

Xanthorrhoea is a genus of about 30 species of flowering plants endemic to Australia.

Perennial plant Plant that lives for more than two years

A perennial plant or simply perennial is a plant that lives more than two years. Some sources cite perennial plants being plants that live more than three years. The term is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth from trees and shrubs, which are also technically perennials.

<i>Brachystegia spiciformis</i> species of plant

Brachystegia spiciformis Benth., commonly known as zebrawood, or Msasa, is a medium-sized African tree having compound leaves and racemes of small fragrant green flowers. The tree is broad and has a distinctive amber and wine red colour when the young leaves sprout during spring (August–September). It grows in savanna, both open woodland and closed woodland of Southern and Eastern Africa, mostly Tanzania, Zambia, Zimbabwe, Malawi and Mozambique. The word Msasa is commonly used as a proper name in African place names. The word also means 'rough plant' in Swahili. Other common names: Mundu, Myombo, Mtondo (Tanzania), Muputu (Zambia). The plant is known in the Venda language as mutsiwa, which means 'the one that is left behind'. An outlying population of Brachystegia has recently been discovered in the Soutpansberg mountains of northern South Africa. This tree is a protected species in South Africa.

<i>Betula papyrifera</i> species of plant

Betula papyrifera is a short-lived species of birch native to northern North America. Paper birch is named due to the thin white bark which often peels in paper like layers from the trunk. Paper birch is often one of the first species to colonize a burned area within the northern latitudes and an important species for moose browse. The wood is often used for pulpwood and firewood.

<i>Prunus serrulata</i> species of plant

Prunus serrulata or Japanese cherry, also called hill cherry, oriental cherry or East Asian cherry, is a species of cherry native to China, Japan, Korea and India, and is used for its spring cherry blossom displays and festivals. Current sources consider it to be part of a species complex with P. jamasakura and P. leveilleana, which have been reduced to synonyms.

<i>Cupressus pigmaea</i> species of plant

Cupressus pigmaea, the Mendocino cypress or pygmy cypress, is a taxon of disputed status in the genus Cupressus endemic to certain coastal terraces and coastal mountain ranges of Mendocino and Sonoma Counties in northwestern California. It is a highly variable tree, and closely related to Cupressus goveniana, enough to sometimes be considered a subspecies of it.

<i>Bare Trees</i> 1972 studio album by Fleetwood Mac

Bare Trees is the sixth studio album by British-American rock band Fleetwood Mac, released in March 1972. This is their last album to feature Danny Kirwan, who was fired during the album's supporting tour. In the wake of the band's success in the mid-1970s, Bare Trees peaked at No. 70 and achieved Gold status in 1976 and certified platinum in 1988 for selling over a million copies.

<i>Quercus chrysolepis</i> species of plant

Quercus chrysolepis, commonly termed canyon live oak, canyon oak, golden cup oak or maul oak, is a North American species of evergreen oak that is found in Mexico and in the western United States, notably in the California Coast Ranges. This tree is often found near creeks and drainage swales growing in moist cool microhabitats. Its leaves are a glossy dark green on the upper surface with prominent spines; a further rapid identification arises from the leaves of canyon live oak being geometrically flat. They are often sympatric with Quercus agrifolia and several other oak species. Fossil data supports a much wider distribution throughout the western United States during the early Holocene period.

<i>Cupressus macnabiana</i> species of plant

Cupressus macnabiana is a species of cypress in western North America.

The elm cultivar Ulmus 'Myrtifolia', the Myrtle-leaved Elm, was identified by Nicholson in Kew Hand-List Trees & Shrubs 2: 135, 1896 but without description. It was later listed as a cultivar by Rehder in 1939, and by Krüssmann in Handbuch der Laubgehölze 2: 540, 1962. The specimen under this name in the Herb. Nicholson at Kew was considered by Melville to be a probable U. minor × Ulmus minor 'Plotii' hybrid.

White-crowned hornbill species of bird

The white-crowned hornbill, also known as the long-crested hornbill or white-crested hornbill, is a species of hornbill.

<i>Congregation Leaving the Reformed Church in Nuenen</i> painting by Vincent van Gogh

Congregation Leaving the Reformed Church at Nuenen is an early painting by Vincent van Gogh, made in early 1884 and modified in late 1885. It is displayed at the Van Gogh Museum in Amsterdam.

<i>Kiggelaria</i> genus of plants

Kiggelaria africana is a large, robust, low-branching African tree, and is currently the only accepted species in the genus Kiggelaria.

<i>Plutos Christmas Tree</i> 1952 film by Jack Hannah

Pluto's Christmas Tree is a 1952 Mickey Mouse cartoon in which Pluto and Mickey cut down a Christmas tree that Chip n' Dale live in. It is one of the few Disney shorts directed by Jack Hannah not to star Donald Duck, although Donald does make a cameo at the end.