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131-466: 9; see text Gyrinops is a genus of nine species of trees , called lign aloes or lign-aloes trees , in the family Thymelaeaceae . They are native to Southeast Asia , the Indian Subcontinent , and New Guinea . The genus Gyrinops is closely related to Aquilaria and in the past all species were considered to belong to Aquilaria. Together with Aquilaria the genus is best known as

262-522: A community deems to hold religious significance are known as sacred trees . The most famous sacred grove in mainland Greece was the oak grove at Dodona . Outside the walls of Athens , the site of the Platonic Academy was a sacred grove of olive trees, still recalled in the phrase "the groves of Academe". In central Italy, the town of Nemi recalls the Latin nemus Aricinum , or "grove of Ariccia ",

393-409: A symbiotic relationship with Frankia species, a filamentous bacterium that can fix nitrogen from the air, converting it into ammonia . They have actinorhizal root nodules on their roots in which the bacteria live. This process enables the tree to live in low nitrogen habitats where they would otherwise be unable to thrive. The plant hormones called cytokinins initiate root nodule formation, in

524-423: A taboo as it is believed that as sunrise is the beginning of the day to mankind, sunset is perceived as the beginning of day to those who dwell in the grave area. Burials are almost always postponed until the next day except in certain cases where it is allowed, provided that additional rules are observed, such as, women and children are not allowed at the night time burial ceremony. An ancient ritual of renaming

655-420: A Greek colony, had a sacred grove so close by it that Julius Caesar had it cut down to facilitate his siege . In Pharsalia , the poet Lucan dramatized it as a place where sunlight could not reach through the branches, where no animal or bird lived, where the wind did not blow, but branches moved on their own, where human sacrifice was practiced, in a clear attempt to dramatize the situation and distract from

786-416: A classic example of parallel evolution . With an estimated 60,000-100,000 species, the number of trees worldwide might total twenty-five per cent of all living plant species. The greatest number of these grow in tropical regions; many of these areas have not yet been fully surveyed by botanists , making tree diversity and ranges poorly known. The majority of tree species are angiosperms or hardwoods. Of

917-476: A critical role in the protection of watersheds and water sources. Indigenous Bunong people in Mondulkiri province , Cambodia consider forests to be sacred. Deforestation and land concessions in the country has threatened their land tenure and traditions. In India, sacred groves are scattered all over the country, and do enjoy protection. Prior to 2002, these forest regions were not recognized under any of

1048-503: A drier savanna climate and insufficient rainfall to support dense forests, the canopy is not closed, and plenty of sunshine reaches the ground which is covered with grass and scrub. Acacia and baobab are well adapted to living in such areas. The roots of a tree serve to anchor it to the ground and gather water and nutrients to transfer to all parts of the tree. They are also used for reproduction, defence, survival, energy storage and many other purposes. The radicle or embryonic root

1179-418: A hundred litres are required to make one litre of birch syrup. Various parts of trees are used as spices. These include cinnamon , made from the bark of the cinnamon tree ( Cinnamomum zeylanicum ) and allspice , the dried small fruits of the pimento tree ( Pimenta dioica ). Nutmeg is a seed found in the fleshy fruit of the nutmeg tree ( Myristica fragrans ) and cloves are the unopened flower buds of

1310-474: A national historic site (国の史跡). The Kamigamo Shrine and the Shimogamo Shrine , along with other Historic Monuments of Ancient Kyoto (Kyoto, Uji and Otsu Cities) , have been designated World Heritage Sites since 1994. The Utaki sacred sites (often with associated burial grounds) on Okinawa are based on Ryukyuan religion , and usually are associated with toun or kami-asagi – regions dedicated to

1441-696: A place named Mangatoor in Kerala. Sacred groves are being destroyed as a part of urbanization . The family "Nalukettil Puthenpurayil" still protects sacred groves. Dev Bhoomi, or the "Land of Gods," is part of the 133 sacred groves in the foothills of the Himalayas in Uttarakhand. Known for its rivers, lakes, caves, and forests, it is considered the holiest land in the region. Local communities honor deities like Haat Kaali, Kotgyari Devi, and Mahakaali. Unlike typical forests, these sacred groves are alpine meadows, deeply tied to

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1572-509: A process closely related to mycorrhizal association. It has been demonstrated that some trees are interconnected through their root system, forming a colony. The interconnections are made by the inosculation process, a kind of natural grafting or welding of vegetal tissues. The tests to demonstrate this networking are performed by injecting chemicals, sometimes radioactive , into a tree, and then checking for its presence in neighbouring trees. The roots are, generally, an underground part of

1703-404: A process known as cladoptosis . The crown is the spreading top of a tree including the branches and leaves, while the uppermost layer in a forest, formed by the crowns of the trees, is known as the canopy . A sapling is a young tree. Many tall palms are herbaceous monocots, which do not undergo secondary growth and never produce wood. In many tall palms, the terminal bud on the main stem

1834-422: A second spurt of growth, a Lammas growth may occur which is believed to be a strategy to compensate for loss of early foliage to insect predators. Primary growth is the elongation of the stems and roots. Secondary growth consists of a progressive thickening and strengthening of the tissues as the outer layer of the epidermis is converted into bark and the cambium layer creates new phloem and xylem cells. The bark

1965-489: A significant role in reducing erosion and moderating the climate . They remove carbon dioxide from the atmosphere and store large quantities of carbon in their tissues. Trees and forests provide a habitat for many species of animals and plants. Tropical rainforests are among the most biodiverse habitats in the world. Trees provide shade and shelter , timber for construction, fuel for cooking and heating, and fruit for food as well as having many other uses. In much of

2096-607: A significant role in the folk beliefs of the Germanic peoples. Across Benin and Togo (Dahomey Gap, West Africa), sacred forests form islands of biodiversity in the middle of overgrazed, woody, semiarid savannahs and croplands. Due to their tendency to be maintained over long periods of time, the sacred forests contain valuable remnants of ecological communities from the once extensive forests. Soils in these forests store significant amounts soil carbon as both soil organic carbon (SOC) and soil inorganic carbon (SIC). Soil inorganic carbon

2227-424: A similar growth form, by usually growing larger and having a single main stem; but there is no consistent distinction between a tree and a shrub, made more confusing by the fact that trees may be reduced in size under harsher environmental conditions such as on mountains and subarctic areas. The tree form has evolved separately in unrelated classes of plants in response to similar environmental challenges, making it

2358-467: A single tree species, which will not flourish in the absence of its mycorrhizal associate. Others are generalists and associate with many species. The tree acquires minerals such as phosphorus from the fungus, while the fungus obtains the carbohydrate products of photosynthesis from the tree. The hyphae of the fungus can link different trees and a network is formed, transferring nutrients and signals from one place to another. The fungus promotes growth of

2489-636: A slightly looser definition; while the Joshua tree , bamboos and palms do not have secondary growth and never produce true wood with growth rings, they may produce "pseudo-wood" by lignifying cells formed by primary growth. Tree species in the genus Dracaena , despite also being monocots, do have secondary growth caused by meristem in their trunk, but it is different from the thickening meristem found in dicotyledonous trees. Aside from structural definitions, trees are commonly defined by use; for instance, as those plants which yield lumber. The tree growth habit

2620-620: A small town a quarter of the way around the lake. In antiquity, the area had no town, but the grove was the site of one of the most famous of Roman cults and temples: that of Diana Nemorensis , a study of which served as the seed for Sir James Frazer 's seminal work on the anthropology of religion, The Golden Bough . A sacred grove behind the House of the Vestal Virgins on the edge of the Roman Forum lingered until its last vestiges were burnt in

2751-484: A tree is any plant with the general form of an elongated stem, or trunk, which supports the photosynthetic leaves or branches at some distance above the ground. Trees are also typically defined by height, with smaller plants from 0.5 to 10 m (1.6 to 32.8 ft) being called shrubs , so the minimum height of a tree is only loosely defined. Large herbaceous plants such as papaya and bananas are trees in this broad sense. A commonly applied narrower definition

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2882-399: 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 monophyletic taxonomic group but consist of a wide variety of plant species that have independently evolved a trunk and branches as

3013-444: A way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees evolved around 370 million years ago, and it is estimated that there are around three trillion mature trees in the world currently. A tree typically has many secondary branches supported clear of

3144-436: A wide range of edible fruits are found in the tropics. Other commercially important fruit include dates, figs and olives. Palm oil is obtained from the fruits of the oil palm ( Elaeis guineensis ). The fruits of the cocoa tree ( Theobroma cacao ) are used to make cocoa and chocolate and the berries of coffee trees, Coffea arabica and Coffea canephora , are processed to extract the coffee beans. In many rural areas of

3275-416: A wide range of shapes and sizes, in response to environmental pressures including climate and predation. They can be broad or needle-like, simple or compound, lobed or entire, smooth or hairy, delicate or tough, deciduous or evergreen. The needles of coniferous trees are compact but are structurally similar to those of broad-leaved trees. They are adapted for life in environments where resources are low or water

3406-542: A widespread diverse group of which the only survivor is the maidenhair tree Ginkgo biloba . This is considered to be a living fossil because it is virtually unchanged from the fossilised specimens found in Triassic deposits. During the Mesozoic (245 to 66 million years ago) the conifers flourished and became adapted to live in all the major terrestrial habitats. Subsequently, the tree forms of flowering plants evolved during

3537-549: Is a flavouring obtained from distilling bark from the roots of the sassafras tree ( Sassafras albidum ). The leaves of trees are widely gathered as fodder for livestock and some can be eaten by humans but they tend to be high in tannins which makes them bitter. Leaves of the curry tree ( Murraya koenigii ) are eaten, those of kaffir lime ( Citrus × hystrix ) (in Thai food ) and Ailanthus (in Korean dishes such as bugak ) and those of

3668-512: Is a rudimentary stalk and neatly folded miniature leaves, ready to expand when the next growing season arrives. Buds also form in the axils of the leaves ready to produce new side shoots. A few trees, such as the eucalyptus , have "naked buds" with no protective scales and some conifers, such as the Lawson's cypress , have no buds but instead have little pockets of meristem concealed among the scale-like leaves. When growing conditions improve, such as

3799-416: Is a sudden movement of sap at the end of the winter as trees prepare to burst into growth. In North America, the sap of the sugar maple ( Acer saccharum ) is used in the production of maple syrup . About 90% of the sap is water, the remaining 10% being a mixture of various sugars and certain minerals. The sap is harvested by drilling holes in the trunks of the trees and collecting the liquid that flows out of

3930-545: Is also found in the southern hemisphere, as for example in the Eastern Australia temperate forest, characterised by Eucalyptus forest and open acacia woodland. In tropical regions with a monsoon or monsoon-like climate, where a drier part of the year alternates with a wet period as in the Amazon rainforest , different species of broad-leaved trees dominate the forest, some of them being deciduous. In tropical regions with

4061-528: Is an evolutionary adaptation found in different groups of plants: by growing taller, trees are able to compete better for sunlight. Trees tend to be tall and long-lived, some reaching several thousand years old. Several trees are among the oldest organisms now living. Trees have modified structures such as thicker stems composed of specialised cells that add structural strength and durability, allowing them to grow taller than many other plants and to spread out their foliage. They differ from shrubs , which have

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4192-599: Is an important carbon sink because it preserved over a longer time frame than the soil organic carbon. There is a high potential for development of the soils for potential carbon sequestration . Sacred groves are also present in Ghana . One of Ghana's most famous sacred groves – the Buoyem Sacred Grove – and numerous other sacred groves are present in the Techiman Municipal District and nearby districts of

4323-431: Is associated with a presiding deity, and the groves are referred to by different names in different parts of India. They were maintained by local communities with hunting and logging strictly prohibited within these patches. While most of these sacred deities are associated with local Hindu gods, sacred groves of Islamic and Buddhist origins are also known. Sacred groves occur in a variety of places – from scrub forests in

4454-418: Is continually replaced by a living layer of cells called the cork cambium or phellogen. The London plane ( Platanus × hispanica ) periodically sheds its bark in large flakes. Similarly, the bark of the silver birch ( Betula pendula ) peels off in strips. As the tree's girth expands, newer layers of bark are larger in circumference, and the older layers develop fissures in many species. In some trees such as

4585-499: Is developed by the Indian banyan . Many large trees have buttress roots which flare out from the lower part of the trunk. These brace the tree rather like angle brackets and provide stability, reducing sway in high winds. They are particularly prevalent in tropical rainforests where the soil is poor and the roots are close to the surface. Some tree species have developed root extensions that pop out of soil, in order to get oxygen, when it

4716-444: Is dotted with shrines and sculptures. Oloye Susanne Wenger , an Austrian artist, helped revive the grove. The grove was declared a UNESCO World Heritage Site in 2005. Sacred forests continue to hold an important place in the everyday lives of Indigenous and rural people across South, East, and Southeast Asia. A large-scale comparative analysis of sacred groves in ten countries within these regions indicates that they have long played

4847-731: Is home of the Bono people . There are many groups of trees and groves that remain sacred to local indigenous populations, such as the Kikuyu , the Maasai , and the Mbeere tribe of central Kenya . In 2008, the Kaya forests, a group of 10 forest sites spread over 200 km (124 mi), were made a World Heritage Site by UNESCO . They are a series of forests located along the coast of Kenya, accompanied by fortified villages known as kayas. These kayas were originally built in

4978-486: Is inelastic. Eventually the growth of a tree slows down and stops and it gets no taller. If damage occurs the tree may in time become hollow. Leaves are structures specialised for photosynthesis and are arranged on the tree in such a way as to maximise their exposure to light without shading each other. They are an important investment by the tree and may be thorny or contain phytoliths , lignins , tannins or poisons to discourage herbivory. Trees have evolved leaves in

5109-424: Is not available in the soil because of excess water. These root extensions are called pneumatophores , and are present, among others, in black mangrove and pond cypress. The main purpose of the trunk is to raise the leaves above the ground, enabling the tree to overtop other plants and outcompete them for light. It also transports water and nutrients from the roots to the aerial parts of the tree, and distributes

5240-546: Is noted in the earliest written reports about the Germanic peoples, with the Roman historian Tacitus stating that Germanic cult practices took place exclusively in groves rather than temples. Scholars consider that reverence for and rites performed at individual trees are derived from the mythological role of the world tree, Yggdrasil ; onomastic and some historical evidence also connects individual deities to both groves and individual trees. After Christianization, trees continue to play

5371-587: Is part of the Kashima Wildlife Preservation Area . The woods include over 800 kinds of trees and varied animal and plant life. Tadasu no Mori ( 糺の森 ) is a general term for a wooded area associated with the Kamo Shrine , which is a Shinto sanctuary near the banks of the Kamo River in northeast Kyoto. The ambit of today's forest encompasses approximately 12.4 hectares, which are preserved as

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5502-458: Is ready to eat when the process is complete, having been tenderised and flavoured by the smoke it has absorbed. In the cold process, the temperature is not allowed to rise above 100 °F (38 °C). The flavour of the food is enhanced but raw food requires further cooking. If it is to be preserved, meat should be cured before cold smoking. Wood has traditionally been used for fuel, especially in rural areas. In less developed nations it may be

5633-428: Is related to climatic conditions; growth normally ceases when conditions are either too cold or too dry. In readiness for the inactive period, trees form buds to protect the meristem , the zone of active growth. Before the period of dormancy, the last few leaves produced at the tip of a twig form scales. These are thick, small and closely wrapped and enclose the growing point in a waterproof sheath. Inside this bud there

5764-407: Is scarce. Frozen ground may limit water availability and conifers are often found in colder places at higher altitudes and higher latitudes than broad leaved trees. In conifers such as fir trees, the branches hang down at an angle to the trunk, enabling them to shed snow. In contrast, broad leaved trees in temperate regions deal with winter weather by shedding their leaves. When the days get shorter and

5895-402: Is that a tree has a woody trunk formed by secondary growth , meaning that the trunk thickens each year by growing outwards, in addition to the primary upwards growth from the growing tip . Under such a definition, herbaceous plants such as palms , bananas and papayas are not considered trees regardless of their height, growth form or stem girth. Certain monocots may be considered trees under

6026-599: Is that in the Nevet forest near Locronan in Brittany , France. Gournay-sur-Aronde (Gournay-on-Aronde), a village in the Oise department of France, also houses the remains of a nemeton . Nemetons were often fenced off by enclosures, as indicated by the German term Viereckschanze – meaning a quadrangular space surrounded by a ditch enclosed by wooden palisades. Many of these groves, like

6157-471: Is the first part of a seedling to emerge from the seed during the process of germination . This develops into a taproot which goes straight downwards. Within a few weeks lateral roots branch out of the side of this and grow horizontally through the upper layers of the soil. In most trees, the taproot eventually withers away and the wide-spreading laterals remain. Near the tip of the finer roots are single cell root hairs . These are in immediate contact with

6288-452: Is the only one to develop, so they have unbranched trunks with large spirally arranged leaves. Some of the tree ferns, order Cyatheales , have tall straight trunks, growing up to 20 metres (66 ft), but these are composed not of wood but of rhizomes which grow vertically and are covered by numerous adventitious roots . The number of trees in the world, according to a 2015 estimate, is 3.04 trillion, of which 1.39 trillion (46%) are in

6419-766: The Anweam Sacred Grove in the Esukawkaw Forest Reserve Other well-known sacred groves in present-day Ghana include the Malshegu Sacred Grove in Northern Ghana – one of the last remaining closed-canopy forests in the savannah regions, and the Jachie sacred grove. The Tanoboase Sacred Grove and Shrine is located near the village of Tanoboase in the Techiman, Brong Ahafo region of Ghana. The site

6550-650: The Brong Ahafo Region . They provide a refuge for wildlife which has been exterminated in nearby areas, and one grove most notably houses 20,000 fruit bats in caves. The capital of the historical Ghana Empire , contained a sacred grove called al-gâba (Ar. "the forest") for performing religious rites of the Soninke people . Other sacred groves in Ghana include sacred groves along the coastal savannahs of Ghana. Many sacred groves in Ghana are now under federal protection – like

6681-504: The Cretaceous period. These began to displace the conifers during the Tertiary era (66 to 2 million years ago) when forests covered the globe. When the climate cooled 1.5 million years ago and the first of four glacial periods occurred, the forests retreated as the ice advanced. In the interglacials , trees recolonised the land that had been covered by ice, only to be driven back again in

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6812-566: The Great Fire of Rome in 64 CE. In the town of Spoleto , Umbria , two stones from the late third century BCE, inscribed in archaic Latin, that established punishments for the profanation of the woods dedicated to Jupiter ( Lex Luci Spoletina ) have survived; they are preserved in the National Archeological Museum of Spoleto. The Bosco Sacro (literally sacred grove ) in the garden of Bomarzo , Italy, lends its associations to

6943-491: The Luo people of western Kenya , and is said to be the first site they established after migrating from South Sudan . The hill is named after Ramogi, a notable Luo leader. The hill and forests are considered holy and sacred, and the Luo people use the hill for cultural and religious practices, including as a source of herbal medicine and a place of meditation . According to the Luo people,

7074-961: The Thar Desert of Rajasthan maintained by the Bishnois , to rain forests in the Kerala Western Ghats . Himachal Pradesh in the North and Kerala in the South are specifically known for their large numbers of sacred groves. The Kodavas of Karnataka maintained over 1000 sacred groves in Kodagu alone. The district of Uttara Kannada in Karnataka also harbours a large number of sacred groves. Around 14,000 sacred groves have been reported from all over India, which act as reservoirs of rare fauna, and more often rare flora, amid rural and even urban settings. Experts believe that

7205-414: The annual growth rings There may also be rays running at right angles to growth rings. These are vascular rays which are thin sheets of living tissue permeating the wood. Many older trees may become hollow but may still stand upright for many years. Trees do not usually grow continuously throughout the year but mostly have spurts of active expansion followed by periods of rest. This pattern of growth

7336-411: The mythological landscape and cult practice of Celtic , Estonian , Baltic , Germanic , ancient Greek , Near Eastern , Roman , and Slavic polytheism . They are also found in locations such as India (Maharashtra, Karnataka, Kerala, and Tamil Nadu) , Japan ( sacred shrine forests ), China ( Fengshui woodland ), West Africa and Ethiopia ( church forests ). Examples of sacred groves include

7467-546: The pine ( Pinus species) the bark exudes sticky resin which deters attackers whereas in rubber trees ( Hevea brasiliensis ) it is a milky latex that oozes out. The quinine bark tree ( Cinchona officinalis ) contains bitter substances to make the bark unpalatable. Large tree-like plants with lignified trunks in the Pteridophyta , Arecales , Cycadophyta and Poales such as the tree ferns, palms, cycads and bamboos have different structures and outer coverings. Although

7598-433: The yabunikkei or Cinnamomum japonicum (a form of wild cinnamon). Direct access to the grove is forbidden. Much of the ways of the ancient inhabitants of Malaysia have largely been forgotten, mostly due to the taboos among the local populace on putting certain esoteric knowledge down in ink, thus only passed down through examples and word of mouth from mother to daughter and father to son. However, much can be observed by

7729-525: The 12,000 years since the start of human agriculture, the number of trees worldwide has decreased by 46%. There are approximately 64,100 known tree species in the world. With 43% of all tree species, South America has the highest biodiversity, followed by Eurasia (22%), Africa (16%), North America (15%), and Oceania (11%). In suitable environments, such as the Daintree Rainforest in Queensland , or

7860-552: The 14th-century documents of the Teutonic Order ( sacra sylva, que Scayte vulgariter nominatur..., silva, quae dicitur Heyligewalt... ). A religious centre of intertribal significance was Romuva ( Romow ) in Nadruvia , Prussia , as described by Peter of Dusburg in 1326. For Curonians sacred groves were closely associated with the cult of the dead . By the early 15th century, with the disappearance of cremation traditions among

7991-463: The 16th century but have uninhabited since the 1940s. They are now regarded as sacred sites. Mount Kenya is a mountain of volcanic origin that stands 5,199 metres (17,057 feet) tall. It has a unique forest and plant ecosystem that holds significant biological and cultural importance, and is home to over 882 plant species. In 1949, it was designated a national park , and in 1978, the UNESCO Man and

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8122-601: The Biosphere Programme named it a Biosphere Reserve. It is considered a sacred site by the Kikuyu, who believed that the top of the mountain was the ‘house’ of God. Ramogi hill is located in the Siaya County of western Kenya. The hill and forest cover a distance of 283 hectares (699 acres) and is home to rich flora including trees, shrubs , flowers, over 100 plant species in total. It is an important historical site for

8253-557: The Curonians the sacred groves of Courland had lost their crematory function but remained as an inviolable place reserved for the dead. The role of the sacred forests in the 16th-century traditions of Curonian Kings is described in a travel description by Königsberg apothecary Reinhold Lubenau: I first reached Mummel and then passed through Courland, reaching the Curonian king, where we had to watch his pagan superstitions. Since Christmas

8384-603: The English oak ( Quercus robur ) and 306 species of invertebrate on the Tasmanian oak ( Eucalyptus obliqua ). Non-native tree species provide a less biodiverse community, for example in the United Kingdom the sycamore ( Acer pseudoplatanus ), which originates from southern Europe, has few associated invertebrate species, though its bark supports a wide range of lichens, bryophytes and other epiphytes. Trees differ ecologically in

8515-535: The European bay tree ( Laurus nobilis ) and the California bay tree ( Umbellularia californica ) are used for flavouring food. Camellia sinensis , the source of tea, is a small tree but seldom reaches its full height, being heavily pruned to make picking the leaves easier. Wood smoke can be used to preserve food. In the hot smoking process the food is exposed to smoke and heat in a controlled environment. The food

8646-666: The Greco-Roman temenos , various Germanic words for sacred groves , and the Celtic nemeton , which was largely but not exclusively associated with Druidic practice. During the Northern Crusades of the Middle Ages, conquering Christians commonly built churches on the sites of sacred groves. The Lakota and various other North American tribes regard particular forests or other natural landmarks as sacred places. Singular trees which

8777-476: The Lord Gautama Buddha and founded Buddhism after achieving Enlightenment . The Mayadevi Temple is located at Lumbini. In the animistic native Filipino religion called Bathala , the worshiping anito spirits, balete trees ( Ficus spp.), also known as nonok or nunuk , are regarded as abodes of spirits or gateways to the spirit world. Cutting them down was taboo , a superstition that

8908-496: The arrival of warmer weather and the longer days associated with spring in temperate regions, growth starts again. The expanding shoot pushes its way out, shedding the scales in the process. These leave behind scars on the surface of the twig. The whole year's growth may take place in just a few weeks. The new stem is unlignified at first and may be green and downy. The Arecaceae (palms) have their leaves spirally arranged on an unbranched trunk. In some tree species in temperate climates,

9039-437: The bark functions as a protective barrier, it is itself attacked by boring insects such as beetles. These lay their eggs in crevices and the larvae chew their way through the cellulose tissues leaving a gallery of tunnels. This may allow fungal spores to gain admittance and attack the tree. Dutch elm disease is caused by a fungus ( Ophiostoma species) carried from one elm tree to another by various beetles. The tree reacts to

9170-407: The branches divide into smaller branches and shoots. The shoots typically bear leaves, which capture light energy and convert it into sugars by photosynthesis , providing the food for the tree's growth and development. Trees usually reproduce using seeds . Flowering plants have their seeds inside fruits, while conifers carry their seeds in cones, and tree ferns produce spores instead. Trees play

9301-440: The clove tree ( Syzygium aromaticum ). Many trees have flowers rich in nectar which are attractive to bees. The production of forest honey is an important industry in rural areas of the developing world where it is undertaken by small-scale beekeepers using traditional methods. The flowers of the elder ( Sambucus ) are used to make elderflower cordial and petals of the plum ( Prunus spp. ) can be candied. Sassafras oil

9432-465: The cone for years waiting for a trigger event to liberate it. Fire stimulates release and germination of seeds of the jack pine , and also enriches the forest floor with wood ash and removes competing vegetation. Similarly, a number of angiosperms including Acacia cyclops and Acacia mangium have seeds that germinate better after exposure to high temperatures. The single extant species of Ginkgophyta ( Ginkgo biloba ) has fleshy seeds produced at

9563-438: The deceased as she or he is laid into the earth is also practiced. The Orang Asli and Malay (see Malaysian names ) naming system has a living name and a spirit name, which is given during the ritual of burial. This name is known as nama arwah (spirit name). The living name is usually the given name plus the word 'anak' which means 'son/daughter of' or 'bin' and 'binti' which mean 'son of' or 'daughter of' respectively; followed by

9694-424: The ease with which they can be found by herbivores. Tree apparency varies with a tree's size and semiochemical content, and with the extent to which it is concealed by nonhost neighbours from its insect pests . In ecosystems such as mangrove swamps, trees play a role in developing the habitat, since the roots of the mangrove trees reduce the speed of flow of tidal currents and trap water-borne sediment, reducing

9825-645: The ends of short branches on female trees, and Gnetum , a tropical and subtropical group of gymnosperms produce seeds at the tip of a shoot axis. The earliest trees were tree ferns , horsetails and lycophytes , which grew in forests in the Carboniferous period. The first tree may have been Wattieza , fossils of which were found in New York state in 2007 dating back to the Middle Devonian (about 385 million years ago). Prior to this discovery, Archaeopteris

9956-700: The ethnic identity of local groups. Their survival is believed to depend on oral traditions, with no written laws. Customary taboos forbid harming the groves, including plucking flowers, uprooting plants, or disturbing animals and religious objects. Despite the abundance of sacred groves in India, they are gradually disappearing due to cultural shifts and growing pressure to exploit the natural resources within these groves. Sacred groves in Japan are typically associated with Shinto shrines and are located all over Japan. They have existed since ancient times and shrines are often built in

10087-518: The existing laws. But in 2002 an amendment was brought in Wildlife Protection Act, 1972 to include Sacred Groves under the act. In 2016, a framework was published by the intergovernmental organization ICIMOD to help assess the present day significance of sacred natural sites , including sacred groves in all Himalayan countries to enable better policy uptake of these sites. Some NGOs work with local villagers to protect such groves. Each grove

10218-461: The far north of the northern hemisphere is moist taiga or northern coniferous forest (also called boreal forest). Taiga is the world's largest land biome , forming 29% of the world's forest cover. The long cold winter of the far north is unsuitable for plant growth and trees must grow rapidly in the short summer season when the temperature rises and the days are long. Light is very limited under their dense cover and there may be little plant life on

10349-480: The food produced by the leaves to all other parts, including the roots. In the case of angiosperms and gymnosperms, the outermost layer of the trunk is the bark , mostly composed of dead cells of phellem (cork). It provides a thick, waterproof covering to the living inner tissue. It protects the trunk against the elements, disease, animal attack and fire. It is perforated by a large number of fine breathing pores called lenticels , through which oxygen diffuses. Bark

10480-401: The forest floor, although fungi may abound. Similar woodland is found on mountains where the altitude causes the average temperature to be lower thus reducing the length of the growing season. Where rainfall is relatively evenly spread across the seasons in temperate regions, temperate broadleaf and mixed forest typified by species like oak, beech, birch and maple is found. Temperate forest

10611-540: The form of fruits and seeds) to squirrels , foxes , insects and birds. Commonly, a cat, or in most instances, many cats are kept to patrol the gardens and guard from harmful spirits as well as against rats which were believed to carry unclean spirits and diseases. However, one of the most striking examples of the tree reverence among them can be seen in the graveyards which are considered as holy ground , on which no stone structure can be built upon. The whole area are covered by large and tall trees, so much foliage that

10742-425: The fruits and either discard the seeds, or swallow them so they pass through the gut to be deposited in the animal's droppings well away from the parent tree. The germination of some seeds is improved when they are processed in this way. Nuts may be gathered by animals such as squirrels that cache any not immediately consumed. Many of these caches are never revisited; the nut-casing softens with rain and frost, and

10873-475: The gates of the house, one has to bow, as if implying or imitating respect upon entry to a sacred grove which were practiced by their ancestors . Such practices are even performed by those who have migrated into the cities who prefer to live in houses on the ground, rather than in high rise apartments. A garden of fruit trees surrounded by larger trees are planted around the houses to provide shade and an illusion of being at 'home' as well as to provide sustenance (in

11004-517: The gods where people are forbidden to go. Sacred groves are often present in such places, as also in Gusukus – fortified areas which contain sacred sites within them. The Seifa-utaki was designated as a UNESCO World Heritage Site designated in 2003. It consists of a triangular cavern formed by gigantic rocks, and contains a sacred grove with rare, indigenous trees like the Kubanoki (a kind of palm) and

11135-411: The ground by the trunk, which typically contains woody tissue for strength, and vascular tissue to carry materials from one part of the tree to another. For most trees the trunk is surrounded by a layer of bark which serves as a protective barrier. Below the ground, the roots branch and spread out widely; they serve to anchor the tree and extract moisture and nutrients from the soil . Above ground,

11266-480: The ground underneath trees there is shade, and often there is undergrowth, leaf litter , and decaying wood that provide other habitat. Trees stabilise the soil, prevent rapid run-off of rain water, help prevent desertification, have a role in climate control and help in the maintenance of biodiversity and ecosystem balance. Many species of tree support their own specialised invertebrates . In their natural habitats, 284 different species of insect have been found on

11397-421: The ground. Trees use a variety of methods of seed dispersal . Some rely on wind, with winged or plumed seeds. Others rely on animals, for example with edible fruits. Others again eject their seeds (ballistic dispersal), or use gravity so that seeds fall and sometimes roll. Seeds are the primary way that trees reproduce and their seeds vary greatly in size and shape. Some of the largest seeds come from trees, but

11528-415: The grounds onto the surface. There is also a ritual of planting small tree sapling on fresh graves by family members who will then water it and tend to it periodically. Petals from fresh red and pink roses are also brought upon visitation to be scattered on the graves and a ritual of pouring rose water upon the soils are also performed. The Malays regard visiting the graves from between sunset to sunrise as

11659-413: The growth of the fungus by blocking off the xylem tissue carrying sap upwards and the branch above, and eventually the whole tree, is deprived of nourishment and dies. In Britain in the 1990s, 25 million elm trees were killed by this disease. The innermost layer of bark is known as the phloem and this is involved in the transport of the sap containing the sugars made by photosynthesis to other parts of

11790-447: The heartwood are blocked in some species. Heartwood is usually darker in colour than the sapwood. It is the dense central core of the trunk giving it rigidity. Three quarters of the dry mass of the xylem is cellulose , a polysaccharide , and most of the remainder is lignin, a complex polymer . A transverse section through a tree trunk or a horizontal core will show concentric circles of lighter or darker wood – tree rings. These rings are

11921-411: The inserted spigots; the sap is then heated to concentrate the flavour. Similarly in northern Europe the spring rise in the sap of the silver birch ( Betula pendula ) is tapped and collected, either to be drunk fresh or fermented into an alcoholic drink. In Alaska, the sap of the sweet birch ( Betula lenta ) is made into a syrup with a sugar content of 67%. Sweet birch sap is more dilute than maple sap;

12052-400: The inside. The newly created xylem is the sapwood . It is composed of water-conducting cells and associated cells which are often living, and is usually pale in colour. It transports water and minerals from the roots to the upper parts of the tree. The oldest, inner part of the sapwood is progressively converted into heartwood as new sapwood is formed at the cambium. The conductive cells of

12183-418: The larger cities, these houses are abandoned and allowed to return to nature. As most traditional Orang Asli and Malay houses are made of only wood, bamboo , rattan and woven palm leaves (being built without using a single nail), the remains of those houses crumble easily into its surrounding. Besides that, a practice of creating arches of vine and creeping flowering plants so that each time one were to enter

12314-528: The largest tree, Sequoiadendron giganteum , produces one of the smallest tree seeds. The great diversity in tree fruits and seeds reflects the many different ways that tree species have evolved to disperse their offspring. For a tree seedling to grow into an adult tree it needs light. If seeds only fell straight to the ground, competition among the concentrated saplings and the shade of the parent would likely prevent it from flourishing. Many seeds such as birch are small and have papery wings to aid dispersal by

12445-569: The medicinal plants that grow in the forests of Ramogi hill are considered to have strong healing powers. The concept of sacred groves is present in Nigerian mythology as well. The Osun-Osogbo Sacred Grove , containing dense forests, is located just outside the city of Osogbo , and is regarded as one of the last virgin high forests in Nigeria. It is dedicated to the fertility goddess in Yoruba mythology , and

12576-542: The men and women, as well as the children, danced around the table, something that continued for the whole night. When they went to bed one after another, they invited us to eat and take with us what we would, since they would not eat what was left over, but would give it to the dogs. Neither did they want to take any payment from us for what we had eaten. The Celts used sacred groves, called nemeton in Gaulish , for performing rituals, based on Celtic mythology . The deity involved

12707-459: The midst of preexisting groves. The Cryptomeria tree is venerated in Shinto practice, and considered sacred. Among the sacred groves associated with such jinja s or Shinto shrines is the 20-hectare wooded area associated with Atsuta Shrine ( 熱田神宮 , Atsuta-jingū ) at Atsuta-ku, Nagoya . The 1500-hectare forest associated with Kashima Shrine was declared a "protected area" in 1953. Today it

12838-409: The mixed podocarp and broadleaf forest of Ulva Island, New Zealand , forest is the more-or-less stable climatic climax community at the end of a plant succession, where open areas such as grassland are colonised by taller plants, which in turn give way to trees that eventually form a forest canopy. In cool temperate regions, conifers often predominate; a widely distributed climax community in

12969-562: The name of the father. When a person dies, the father's name is replaced with his or her mother's name and this is made known during the reading of burial sentences. Granted World Heritage status by UNESCO in 1997, Lumbini Grove is a Buddhist pilgrimage site in the Rupandehi District of Nepal . It is the place where, according to Buddhist tradition, Queen Mayadevi gave birth to Siddhartha Gautama in 623 BCE . Gautama, who achieved nirvana some time around 543 BCE, became

13100-519: The next glacial period. Trees are an important part of the terrestrial ecosystem , providing essential habitats including many kinds of forest for communities of organisms. Epiphytic plants such as ferns , some mosses, liverworts, orchids and some species of parasitic plants (e.g., mistletoe ) hang from branches; these along with arboreal lichens, algae, and fungi provide micro-habitats for themselves and for other organisms, including animals. Leaves, flowers and fruits are seasonally available. On

13231-420: The old lineages of flowering plants called basal angiosperms or paleodicots ; these include Amborella , Magnolia , nutmeg and avocado , while trees such as bamboo, palms and bananas are monocots . Wood gives structural strength to the trunk of most types of tree; this supports the plant as it grows larger. The vascular system of trees allows water, nutrients and other chemicals to be distributed around

13362-495: The only fuel available and collecting firewood is often a time-consuming task as it becomes necessary to travel further and further afield in the search for fuel. It is often burned inefficiently on an open fire. In more developed countries other fuels are available and burning wood is a choice rather than a necessity. Modern wood-burning stoves are very fuel efficient and new products such as wood pellets are available to burn. Sacred grove They were important features of

13493-585: The plant and reduce water loss. Both the production of wood and the production of cork are forms of secondary growth. Trees are either evergreen , having foliage that persists and remains green throughout the year, or deciduous , shedding their leaves at the end of the growing season and then having a dormant period without foliage. Most conifers are evergreens, but larches ( Larix and Pseudolarix ) are deciduous, dropping their needles each autumn, and some species of cypress ( Glyptostrobus , Metasequoia and Taxodium ) shed small leafy shoots annually in

13624-409: The plant, and without it trees would not be able to grow as large as they do. Trees need to draw water high up the stem through the xylem from the roots by capillary action , as water continually evaporates from the leaves in the process of transpiration . If insufficient water is available the leaves will die. The three main parts of trees include the root, stem, and leaves; they are integral parts of

13755-405: The planting of gahara , as it is known as locally, in eastern Indonesia, particularly in the province of Papua . Nine species are accepted. This Thymelaeaceae article is a stub . You can help Misplaced Pages by expanding it . Tree 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

13886-429: The principal producer of the resin -suffused agarwood . The depletion of wild trees from indiscriminate cutting for agarwood has resulted in the trees being listed and protected as an endangered species . Projects are currently underway in some countries in southeast Asia to infect cultivated trees artificially to produce agarwood in a sustainable manner. In Indonesia, for example, there have been proposals to encourage

14017-437: The rest, many are gymnosperms or softwood trees; these include conifers , cycads , ginkgophytes and gnetales , which produce seeds which are not enclosed in fruits, but in open structures such as pine cones , and many have tough waxy leaves, such as pine needles. Most angiosperm trees are eudicots , the "true dicotyledons", so named because the seeds contain two cotyledons or seed leaves. There are also some trees among

14148-428: The roots and helps protect the trees against predators and pathogens. It can also limit damage done to a tree by pollution as the fungus accumulate heavy metals within its tissues. Fossil evidence shows that roots have been associated with mycorrhizal fungi since the early Paleozoic , four hundred million years ago, when the first vascular plants colonised dry land. Some trees such as Alder ( Alnus species) have

14279-596: The sacred grove at Didyma , Turkey are thought to be nemeton s, sacred groves protected by druids based on Celtic mythology. In fact, according to Strabo , the central shrine at Galatia was called Drunemeton . Some of these were also sacred groves in Greek times (as in the case of Didyma), but were based on a different or slightly changed mythology. Trees hold a particular role in Germanic paganism and Germanic mythology, both as individuals (sacred trees) and in groups (sacred groves). The central role of trees in Germanic religion

14410-535: The sacrilege entailed in its destruction. There are two mentions on this tradition in the Bible : And Abraham planted a grove in Beersheba, and called there on the name of God. and where the women wove hangings for the grove. Excavations at Labraunda have revealed a large shrine assumed to be that of Zeus Stratios mentioned by Herodotus as a large sacred grove of plane trees sacred to Carians . In Syria, there

14541-488: The scorching tropical sun is reduced to a dim shadow as temperatures drop to a comfortable cool. Malay folklore relates that the trees whisper prayers to the creator in absolution of the past transgression of the ground's once human inhabitants. The trees are also allowed to take root into the graves where the grave keepers ( penjaga kubur in Malay) slowly remove gravestones (which used to be made from wood) as they are ejected from

14672-464: The seeds on the surface of water. Mangroves often grow in water and some species have buoyant fruits with seeds that start germinating before they detach from the parent tree. These float on the water and may become lodged on emerging mudbanks and successfully take root. Other seeds, such as apple pips and plum stones, have fleshy receptacles and smaller fruits like hawthorns have seeds enclosed in edible tissue; animals including mammals and birds eat

14803-434: The soil particles and can absorb water and nutrients such as potassium in solution. The roots require oxygen to respire and only a few species such as mangroves and the pond cypress ( Taxodium ascendens ) can live in permanently waterlogged soil. In the soil, the roots encounter the hyphae of fungi. Many of these are known as mycorrhiza and form a mutualistic relationship with the tree roots. Some are specific to

14934-471: The start of the dry season. Many deciduous trees flower before the new leaves emerge. A few trees do not have true leaves but instead have structures with similar external appearance such as Phylloclades – modified stem structures – as seen in the genus Phyllocladus . Trees can be pollinated either by wind or by animals, mostly insects. Many angiosperm trees are insect pollinated. Wind pollination may take advantage of increased wind speeds high above

15065-413: The surviving seeds germinate in the spring. Pine cones may similarly be hoarded by red squirrels , and grizzly bears may help to disperse the seed by raiding squirrel caches. The seeds of conifers, the largest group of gymnosperms, are enclosed in a cone and most species have seeds that are light and papery that can be blown considerable distances once free from the cone. Sometimes the seed remains in

15196-661: The temperature begins to decrease, the leaves no longer make new chlorophyll and the red and yellow pigments already present in the blades become apparent. Synthesis in the leaf of a plant hormone called auxin also ceases. This causes the cells at the junction of the petiole and the twig to weaken until the joint breaks and the leaf floats to the ground. In tropical and subtropical regions, many trees keep their leaves all year round. Individual leaves may fall intermittently and be replaced by new growth but most leaves remain intact for some time. Other tropical species and those in arid regions may shed all their leaves annually, such as at

15327-642: The total number of sacred groves could be as high as 100,000. Threats to the groves include urbanization, and over-exploitation of resources. While many of the groves are looked upon as abode of Hindu gods, in the recent past a number of them have been partially cleared for construction of shrines and temples. Ritualistic dances and dramatizations based on the local deities that protect the groves are called Theyyam in Kerala and Nagmandalam , among other names, in Karnataka . There are sacred groves in Ernakulam region in

15458-408: The tree, but some tree species have evolved roots that are aerial . The common purposes for aerial roots may be of two kinds, to contribute to the mechanical stability of the tree, and to obtain oxygen from air. An instance of mechanical stability enhancement is the red mangrove that develops prop roots that loop out of the trunk and branches and descend vertically into the mud. A similar structure

15589-432: The tree. It is a soft spongy layer of living cells, some of which are arranged end to end to form tubes. These are supported by parenchyma cells which provide padding and include fibres for strengthening the tissue. Inside the phloem is a layer of undifferentiated cells one cell thick called the vascular cambium layer. The cells are continually dividing, creating phloem cells on the outside and wood cells known as xylem on

15720-492: The tropics or sub-tropics , 0.61 trillion (20%) in the temperate zones , and 0.74 trillion (24%) in the coniferous boreal forests . The estimate is about eight times higher than previous estimates, and is based on tree densities measured on over 400,000 plots. It remains subject to a wide margin of error, not least because the samples are mainly from Europe and North America. The estimate suggests that about 15 billion trees are cut down annually and about 5 billion are planted. In

15851-522: The uncanny atmosphere. Lucus Pisaurensis , the Sacred Grove of Pesaro , Italy was discovered by Patrician Annibale degli Abati Olivieri in 1737 on property he owned along the 'Forbidden Road' ( Collina di Calibano ), just outside Pesaro. This sacred grove is the site of the Votive Stones of Pesaro and was dedicated to Salus , the ancient Roman demi-goddess of well-being. The city of Massilia ,

15982-403: The vascular system which interconnects all the living cells. In trees and other plants that develop wood, the vascular cambium allows the expansion of vascular tissue that produces woody growth. Because this growth ruptures the epidermis of the stem, woody plants also have a cork cambium that develops among the phloem. The cork cambium gives rise to thickened cork cells to protect the surface of

16113-429: The water depth and creating suitable conditions for further mangrove colonisation. Thus mangrove swamps tend to extend seawards in suitable locations. Mangrove swamps also provide an effective buffer against the more damaging effects of cyclones and tsunamis. Trees are the source of many of the world's best known fleshy fruits. Apples, pears, plums, cherries and citrus are all grown commercially in temperate climates and

16244-466: The ways and habits of the natives of Malaysia which include 18 tribes of Orang Asli ( Malay for Natural People) and the Malays , who are often regarded as the 19th tribe. There is a practice of tree planting around houses to the extent that the walls and wooden structures are allowed to give way to the roots of creeping plants, purposely sown at the bases of these structures. With increased migration towards

16375-437: The wind. Ash trees and maples have larger seeds with blade shaped wings which spiral down to the ground when released. The kapok tree has cottony threads to catch the breeze. The flame tree Delonix regia shoots its seeds through the air when the two sides of its long pods crack apart explosively on drying. The miniature cone-like catkins of alder trees produce seeds that contain small droplets of oil that help disperse

16506-465: The world, forests are shrinking as trees are cleared to increase the amount of land available for agriculture. Because of their longevity and usefulness, trees have always been revered, with sacred groves in various cultures, and they play a role in many of the world's mythologies . Although "tree" is a common word, there is no universally recognised precise definition of what a tree is, either botanically or in common language. In its broadest sense,

16637-769: The world, fruit is gathered from forest trees for consumption. Many trees bear edible nuts which can loosely be described as being large, oily kernels found inside a hard shell. These include coconuts ( Cocos nucifera ), Brazil nuts ( Bertholletia excelsa ), pecans ( Carya illinoinensis ), hazel nuts ( Corylus ), almonds ( Prunus dulcis ), walnuts ( Juglans regia ), pistachios ( Pistacia vera ) and many others. They are high in nutritive value and contain high-quality protein, vitamins and minerals as well as dietary fibre. A variety of nut oils are extracted by pressing for culinary use; some such as walnut, pistachio and hazelnut oils are prized for their distinctive flavours, but they tend to spoil quickly. In temperate climates there

16768-732: Was a grove sacred to Adonis at Afqa . A sacred grove is known as alka(s) in Lithuanian and elks in Latvian , however, the terms are also sometimes used to refer to natural holy places in general. The first mention of Baltic sacred groves dates back to 1075 when Adam of Bremen noted Baltic Prussian sacred groves and springs whose sacredness was believed to be polluted by the entry of Christians ( solus prohibetur accessus lucorum et fontium, quos autumant pollui christianorum accessu ). A few sacred groves in Sambian Peninsula are mentioned in

16899-536: Was approaching, they went hunting in their holy forest, where they do no hunting and do not cut a single rod throughout the rest of the year. All that they now hunted there: roe deer, red deer and hares, they skinned, cooked and placed on a long table. They fastened a large number of wax candles to the table, for the souls of their parents, children and relatives. After this, standing and walking to and fro, they ate and drank, and forced us to do likewise. Later, they brought an empty beer keg and beat on it with two sticks, and

17030-450: Was the earliest known tree. Both of these reproduced by spores rather than seeds and are considered to be links between ferns and the gymnosperms which evolved in the Triassic period. The gymnosperms include conifers, cycads, gnetales and ginkgos and these may have appeared as a result of a whole genome duplication event which took place about 319 million years ago. Ginkgophyta was once

17161-623: Was usually Nemetona – a Celtic goddess. Druids oversaw such rituals. Existence of such groves have been found in Germany, Switzerland, Czech Republic and Hungary in Central Europe, in many sites of ancient Gaul in France, as well as England and Northern Ireland . Sacred groves had been plentiful up until the 1st century BC, when the Romans attacked and conquered Gaul. One of the best known nemeton sites

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