Teak (''Tectona grandis'') is a tropical
hardwood
Hardwood is wood from dicot trees. These are usually found in broad-leaved temperate and tropical forests. In temperate and boreal latitudes they are mostly deciduous, but in tropics and subtropics mostly evergreen. Hardwood (which comes from ...
tree species in the family
Lamiaceae
The Lamiaceae ( )
or Labiatae are a family of flowering plants commonly known as the mint, deadnettle or sage family. Many of the plants are aromatic in all parts and include widely used culinary herbs like basil, mint, rosemary, sage, savory ...
. It is a large,
deciduous
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...
tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (
panicle
A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...
s) at the end of the branches. These flowers contain both types of reproductive organs (
perfect flowers). The large, papery leaves of teak trees are often
hairy Hairy may refer to:
* people or animals covered in hairs or fur
* plants covered in trichomes
* insects covered in setae
* people nicknamed "the Hairy"
* Hairy (gene)
See also
* Hairies, a fictional people
* Haerye
''Hunminjeongeum Haerye'' ...
on the lower surface. Teak wood has a leather-like smell when it is freshly milled and is particularly valued for its durability and water resistance. The wood is used for boat building, exterior construction, veneer, furniture, carving, turnings, and other small wood projects.
''Tectona grandis'' is native to
south
South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west.
Etymology
The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...
and
southeast Asia
Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
, mainly
Bangladesh
Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...
,
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
,
Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
,
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
,
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
and
Sri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
, but is naturalised and cultivated in many countries in
Africa
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
and the
Caribbean
The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...
.
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
's teak forests account for nearly half of the world's naturally occurring teak.
Molecular studies show that there are two centres of genetic origin of teak: one in India and the other in Myanmar and Laos.
Description
![Nilambur Teak Plantation 0666](https://upload.wikimedia.org/wikipedia/commons/e/e4/Nilambur_Teak_Plantation_0666.jpg)
Teak is a large
deciduous
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...
tree up to tall with grey to greyish-brown branches, known for its high quality wood. Its leaves are
ovate-elliptic to ovate, long by wide, and are held on robust
petioles which are long.
Leaf margin
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ste ...
s are entire.
[''Tectona grandis''](_blank)
''Flora of China'' 17: 16. Accessed online: 17 December 2010.
![Hyblaea puera at Kadavoor](https://upload.wikimedia.org/wikipedia/commons/7/7d/Hyblaea_puera_at_Kadavoor.jpg)
Fragrant white flowers are borne on long by wide
panicle
A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...
s from June to August. The
corolla tube is 2.5–3 mm long with 2 mm wide obtuse lobes. ''Tectona grandis'' sets fruit from September to December; fruits are globose and 1.2–1.8 cm in diameter.
Flowers are weakly
protandrous
Sequential hermaphroditism (called dichogamy in botany) is a type of hermaphroditism that occurs in many fish, gastropods, and plants. Sequential hermaphroditism occurs when the individual changes its sex at some point in its life. In particular, ...
in that the
anther
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10
Morphology and terminology
A stamen typically consists of a stalk called the filam ...
s precede the
stigma in maturity and pollen is shed within a few hours of the flower opening.
[Tangmitcharoen, S. and J. N. Owens. 1996]
Floral biology, pollination, pistil receptivity, and pollen tube growth of teak (''Tectona grandis'' Linn f.).
''Annals of Botany'', 79(3): 227–241. The flowers are primarily
entomophilous
Entomophily or insect pollination is a form of pollination whereby pollen of plants, especially but not only of flowering plants, is distributed by insects. Flowers pollinated by insects typically advertise themselves with bright colours, some ...
(insect pollinated), but can occasionally be
anemophilous
Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Almost all gymnosperms are anemophilous, as are many plants in the order Poales, including grasses, sedges, and rushes. Other common anemophilous plan ...
(wind pollinated).
[Bryndum, K. and T. Hedegart. 1969. Pollination of teak (''Tectona grandis'' Linn.f.). ''Silv. Genet.'' 18: 77–80.] A 1996 study found that in its native range in Thailand, the major pollinator were species in the bee genus ''
Ceratina
The cosmopolitan bee genus ''Ceratina'', often referred to as small carpenter bees, is the sole lineage of the tribe Ceratinini, and is not closely related to the more familiar carpenter bees. The genus presently contains over 300 species in 23 ...
''.
Wood
* Heartwood is golden-brown. It darkens as it ages. There can be a large variation based on which region the Teak is from. Old growth has much tighter rings than new growth. There is a leather-like scent in newly cut wood.
* Sapwood is whitish to pale yellowish brown. It can be easily separated from heartwood.
* Wood texture is hard and ring porous.
* Density varies according to moisture content: at 15% moisture content it is 660 kg/m.
Botanical history
''Tectona grandis'' was first formally described by
Carl Linnaeus the Younger
Carl Linnaeus the Younger, Carolus Linnaeus the Younger, Carl von Linné den yngre (Swedish; abbreviated Carl von Linné d. y.), or ''Linnaeus filius'' (Latin for ''Linnaeus the son''; abbreviated L.fil. (outdated) or L.f. (modern) as a botanic ...
in his 1782 work ''
Supplementum Plantarum''.
In 1975,
Harold Norman Moldenke
Harold Norman Moldenke, also known as simply Moldenke (1909–1996) was an American botanist/taxonomist. His expertise is largely in the study of Verbenaceae, Avicenniaceae, Stilbaceae, Dicrastylidaceae, Symphoremaceae, Nyctanthaceae and Erio ...
published new descriptions of four
forms
Form is the shape, visual appearance, or configuration of an object. In a wider sense, the form is the way something happens.
Form also refers to:
*Form (document), a document (printed or electronic) with spaces in which to write or enter data
* ...
of this species in the journal ''
Phytologia
Phytologia is an open-access journal to expedite plant systematics, Phytogeography, phytogeographical and Ecology, ecological publication, focused on North America. Its mode of subscription is by sending e-mail to the editor. It has been available ...
''. Moldenke described each form as varying slightly from the
type specimen
In biology, a type is a particular wiktionary:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to a ...
: ''T. grandis'' f. ''canescens'' is distinguished from the type material by being densely
canescent, or covered in hairs, on the underside of the leaf, ''T. grandis'' f. ''pilosula'' is distinct from the type material in the varying morphology of the leaf veins, ''T. grandis'' f. ''punctata'' is only hairy on the larger veins on the underside of the leaf, and ''T. grandis'' f. ''tomentella'' is noted for its dense yellowish
tomentose
Trichomes (); ) are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a pl ...
hairs on the lower surface of the leaf.
[Moldenke, H. N. 1975]
Notes on new and noteworthy plants. LXXVII.
''Phytologia'', 31: 28.
Etymology
The English word ''teak'' comes via the
Portuguese
Portuguese may refer to:
* anything of, from, or related to the country and nation of Portugal
** Portuguese cuisine, traditional foods
** Portuguese language, a Romance language
*** Portuguese dialects, variants of the Portuguese language
** Portu ...
from
Malayalam
Malayalam (; , ) is a Dravidian language spoken in the Indian state of Kerala and the union territories of Lakshadweep and Puducherry (Mahé district) by the Malayali people. It is one of 22 scheduled languages of India. Malayalam was des ...
(cognate with
Tamil
Tamil may refer to:
* Tamils, an ethnic group native to India and some other parts of Asia
**Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils
**Tamil Malaysians, Tamil people native to Malaysia
* Tamil language, nativ ...
,
Telugu
Telugu may refer to:
* Telugu language, a major Dravidian language of India
*Telugu people, an ethno-linguistic group of India
* Telugu script, used to write the Telugu language
** Telugu (Unicode block), a block of Telugu characters in Unicode
S ...
, and
Kannada
Kannada (; ಕನ್ನಡ, ), originally romanised Canarese, is a Dravidian language spoken predominantly by the people of Karnataka in southwestern India, with minorities in all neighbouring states. It has around 47 million native s ...
) via
Sanskrit
Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...
''"shaka"'' and ''"saka"''.
Central Province teak and
Nagpur
Nagpur (pronunciation: Help:IPA/Marathi, aːɡpuːɾ is the third largest city and the winter capital of the Indian state of Maharashtra. It is the 13th largest city in India by population and according to an Oxford's Economics report, Nag ...
teak are named for those regions of India.
Distribution and habitat
''Tectona grandis'' is one of three species in the genus ''Tectona''. The other two species, ''
T. hamiltoniana'' and ''
T. philippinensis'', are
endemics
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
with relatively small native distributions in
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
and the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
, respectively.
[Tewari, D. N. 1992. ''A Monograph on Teak (''Tectona grandis'' Linn.f.)''. International Book Distributors.] ''Tectona grandis'' is native to
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
Bangladesh
Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...
,
Sri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
,
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
,
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
, northern
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
, and northwestern
Laos
Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
.
''Tectona grandis'' is found in a variety of habitats and climatic conditions from arid areas with only 500 mm of rain per year to very moist forests with up to 5,000 mm of rain per year. Typically, though, the annual rainfall in areas where teak grows averages 1,250–1,650 mm with a 3–5 month dry season.
[Kaosa-ard, A. 1981. Teak its natural distribution and related factors. ''Natural History Bulletin of the Siam Society'', 29: 55–74.]
Cultivation
Teak's natural
oil
An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) & lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturated ...
s make it useful in exposed locations, and make the timber termite- and pest-resistant. Teak is durable even when not treated with oil or varnish. Timber cut from old teak trees was once believed to be more durable and harder than plantation-grown teak. Studies have shown that plantation teak performs on par with old-growth teak in erosion rate, dimensional stability, warping, and surface checking, but is more susceptible to colour change from UV exposure.
The vast majority of commercially harvested teak is grown on teak plantations found in
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
and controlled by
Perum Perhutani (a state owned forest enterprise) that manages the country's forests. The primary use of teak harvested in Indonesia is in the production of outdoor teak furniture for export.
Nilambur
Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
in
Kerala
Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...
, India, is also a major producer of teak, and is home to the world's oldest teak plantation.
Teak consumption raises a number of environmental concerns, such as the disappearance of rare old-growth teak. However, its popularity has led to growth in sustainable plantation teak production throughout the seasonally dry tropics in
forestry
Forestry is the science and craft of creating, managing, planting, using, conserving and repairing forests, woodlands, and associated resources for human and environmental benefits. Forestry is practiced in plantations and natural stands. Th ...
plantation
A plantation is an agricultural estate, generally centered on a plantation house, meant for farming that specializes in cash crops, usually mainly planted with a single crop, with perhaps ancillary areas for vegetables for eating and so on. The ...
s. The
Forest Stewardship Council
The Forest Stewardship Council A. C. (FSC) is an international non-profit, multistakeholder organization established in 1993 that promotes responsible management of the world's forests via timber certification. It is an example of a market-ba ...
offers certification of sustainably grown and harvested teak products. Propagation of teak via tissue culture for plantation purposes is commercially viable.
Teak plantations were widely established in
Equatorial Africa
Equatorial Africa is an ambiguous term that sometimes is used to refer either to the equatorial region of Sub-Saharan Africa traversed by the Equator, more broadly to tropical Africa or in a biological and geo-environmental sense to the intra-tr ...
during the
Colonial era. These timber resources, as well as the oil reserves, are at the heart of the current (2014)
South Sudan
South Sudan (; din, Paguot Thudän), officially the Republic of South Sudan ( din, Paankɔc Cuëny Thudän), is a landlocked country in East Africa. It is bordered by Ethiopia, Sudan, Central African Republic, Democratic Republic of the C ...
ese conflict.
Much of the world's teak is exported by
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
and
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
. There is also a rapidly growing plantation grown market in Central America (
Costa Rica
Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...
) and
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...
. With a depletion of remaining natural hectares of teak forests, a growth in plantations in Latin America is expected to rise.
''
Hyblaea puera
''Hyblaea puera'', the teak defoliator, is a moth and cryptic species complex native to South Asia and South-east Asia. It was first described by Pieter Cramer in 1777. The species has also been recently reported to be present in Central America ...
'', commonly known as the teak defoliator, is a
moth
Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...
native to southeast Asia. It is a teak pest whose
caterpillar
Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths).
As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder Sym ...
feeds on teak and other species of trees common in the region of southeast Asia.
Uses
Teak's high oil content, high tensile strength and tight grain make it particularly suitable where weather resistance is desired. It is used in the manufacture of outdoor
furniture
Furniture refers to movable objects intended to support various human activities such as seating (e.g., stools, chairs, and sofas), eating (tables), storing items, eating and/or working with an item, and sleeping (e.g., beds and hammocks). Fu ...
and boat
decks. It is also used for
cutting board
A cutting board (or chopping board) is a durable board on which to place material for cutting. The kitchen cutting board is commonly used in preparing food; other types exist for cutting raw materials such as leather or plastic. Kitchen cutting b ...
s, indoor
flooring
Flooring is the general term for a permanent covering of a floor, or for the work of installing such a floor covering. Floor covering is a term to generically describe any finish material applied over a floor structure to provide a walking surface ...
,
countertop
A countertop, also counter top, counter, benchtop, worktop (British English) or kitchen bench (Australian or New Zealand English), bunker (Scottish English) is a raised, firm, flat, and horizontal surface. They are built for work in kitchens or o ...
s and as a
veneer
Veneer may refer to:
Materials
* Veneer (dentistry), a cosmetic treatment for teeth
* Masonry veneer, a thin facing layer of brick
* Stone veneer, a thin facing layer of stone
* Wood veneer, a thin facing layer of wood
Arts and entertainment
* ' ...
for indoor finishings. Although easily worked, it can cause severe blunting on edged tools because of the presence of silica in the wood. Over time teak can weather to a silvery-grey finish, especially when exposed to sunlight.
Teak is used extensively in India to make doors and window frames, furniture, and columns and beams in homes. It is resistant to
termite
Termites are small insects that live in colonies and have distinct castes (eusocial) and feed on wood or other dead plant matter. Termites comprise the infraorder Isoptera, or alternatively the epifamily Termitoidae, within the order Blattode ...
attacks and damage caused by other
insect
Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...
s. Mature teak fetches a very good price. It is grown extensively by forest departments of different states in forest areas.
Leaves of the teak wood tree are used in making Pellakai gatti (
jackfruit
The jackfruit (''Artocarpus heterophyllus''), also known as jack tree, is a species of tree in the fig, mulberry, and breadfruit family (Moraceae). Its origin is in the region between the Western Ghats of southern India, all of Bangladesh, ...
dumpling), where
batter is poured into a teak leaf and is steamed. This type of usage is found in the coastal district of
Udupi
Udupi (alternate spelling Udipi; also known as Odipu) is a city in the Indian state of Karnataka. Udupi is situated about north of the educational, commercial and industrial hub of Mangalore and about west of state capital Bangalore by road.
...
in the
Tulunadu
Tulunad or Tulu Nadu, also called Bermere sristi or Parashurama Srishti, is a region and a proposed state on the southwestern coast of India. The Tulu people, known as 'Tuluva' (plural 'Tuluver'), speakers of Tulu, a Dravidian language, are ...
region in South
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
. The leaves are also used in
gudeg
Gudeg is a traditional Javanese dish from Yogyakarta and Central Java, Indonesia. Gudeg is made from young unripe jack fruit ( Javanese: ''gori'', Indonesian: '' nangka muda'') stewed for several hours with palm sugar, and coconut milk. Additio ...
, a dish of young jackfruit made in
Central Java
Central Java ( id, Jawa Tengah) is a province of Indonesia, located in the middle of the island of Java. Its administrative capital is Semarang. It is bordered by West Java in the west, the Indian Ocean and the Special Region of Yogyakarta in t ...
,
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, and give the dish its dark brown colour.
Teak is used as a food plant by the
larva
A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle.
The ...
e of
moth
Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...
s of the genus ''
Endoclita
''Endoclita'' is a genus of moths of the family Hepialidae. There are 60 described species found in eastern and southeast Asia and the Indian subcontinent.
Species
*'' Endoclita aboe'' – India
*''Endoclita absurdus'' – China
*''Endoclita ...
'' including ''
E. aroura'', ''
E. chalybeatus'', ''
E. damor'', ''
E. gmelina'', ''
E. malabaricus'', ''
E. sericeus'' and ''
E. signifer'' and other
Lepidoptera
Lepidoptera ( ) is an order (biology), order of insects that includes butterfly, butterflies and moths (both are called lepidopterans). About 180,000 species of the Lepidoptera are described, in 126 Family (biology), families and 46 Taxonomic r ...
including the
turnip moth
''Agrotis segetum'', sometimes known as the turnip moth, is a moth of the family Noctuidae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It is a common European species and it is found in Africa and across ...
.
File:Fauteuil de jardin en teck (brut et huilé).JPG, Teak garden armchairs
File:McIntosh Teak Fold-Over Top with Nest of Tables.jpg, Teak AH McIntosh nested tables
Boatbuilding
![Teak Tree](https://upload.wikimedia.org/wikipedia/commons/6/6d/Teak_Tree.JPG)
Teak has been used as a
boat-building
Boat building is the design and construction of boats and their systems. This includes at a minimum a hull, with propulsion, mechanical, navigation, safety and other systems as a craft requires.
Construction materials and methods
Wood
W ...
material for over 2000 years (it was found in an archaeological dig in
Berenice Panchrysos
Berenice Panchrysos (Greek: , Steph. B., ''s. v.''; Strabo xvi. 771), was an ancient town of ancient Egypt, near Sabae in the Regio Troglodytica, on the west coast of the Red Sea, between the 20th and 21st degrees of North latitude, in modern ...
, a port on the
Indian Roman trade route). In addition to relatively high strength, teak is also highly resistant to rot,
fungi and mildew. The wood has a relatively low shrinkage ratio,
which makes it excellent for applications where it undergoes periodic changes in moisture. Teak has the unusual property of being both an excellent structural timber for framing or planking, while at the same time being easily worked and finished, unlike some otherwise similar woods such as
purpleheart.
For this reason, it is also prized for the trim work on boat interiors. Due to the oily nature of the wood, care must be taken to properly prepare the wood before gluing.
When used on boats, teak is also very flexible in the finishes that may be applied. One option is to use no finish at all, in which case the wood will naturally weather to a pleasing silver grey.
The wood may also be oiled with a finishing agent such as
linseed
Flax, also known as common flax or linseed, is a flowering plant, ''Linum usitatissimum'', in the family Linaceae. It is cultivated as a food and fiber crop in regions of the world with temperate climates. Textiles made from flax are known in ...
or
tung oil.
This results in a pleasant, somewhat dull finish. Finally, teak may also be varnished for a deep, lustrous glow.
Teak is also used extensively in boat
decks, as it is extremely durable and requires very little maintenance. The teak tends to wear in to the softer 'summer' growth bands first, forming a natural 'non-slip' surface.
Any sanding is therefore only damaging. Use of modern cleaning compounds, oils or preservatives will shorten the life of the teak, as it contains natural teak oil a very small distance below the white surface. Wooden boat experts will only wash the teak with salt water, and re-
caulk
Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping.
The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on w ...
when needed. This cleans the deck, and prevents it from drying out and the wood shrinking. The salt helps it absorb and retain moisture, and prevents any mildew and algal growth. Over-maintenance, such as cleaning teak with harsh chemicals, can shorten its usable lifespan as decking.
Propagation
![Tree in new leaves (Tectona grandis) I IMG 8133](https://upload.wikimedia.org/wikipedia/commons/5/5b/Tree_in_new_leaves_%28Tectona_grandis%29_I_IMG_8133.jpg)
Teak is propagated mainly from seeds. Germination of the seeds involves pretreatment to remove dormancy arising from the thick pericarp. Pretreatment involves alternate wetting and drying of the seed. The seeds are soaked in water for 12 hours and then spread to dry in the sun for 12 hours. This is repeated for 10–14 days and then the seeds are sown in shallow germination beds of coarse peat covered by sand. The seeds then germinate after 15 to 30 days.
Clonal propagation of teak has been successfully done through grafting, rooted stem cuttings and micro propagation. While bud grafting on to seedling root stock has been the method used for establishing clonal seed orchards that enables assemblage of clones of the superior trees to encourage crossing, rooted stem cuttings and micro propagated plants are being increasingly used around the world for raising clonal plantations.
World's largest living teak tree
Ministry of Environmental Conservation and Forestry (Myanmar)
The Ministry of Environmental Conservation and Forestry ( my, ) is a ministry in the government of Myanmar responsible for the country's forestry and logging sectors. From 1948 to 5 March 1992, the Ministry was joined with the Ministry of Agric ...
found the world's two biggest living teak trees on 28 August 2017 in
Homalin Township
Homalin Township ( my, ဟုမ္မလင်း မြို့နယ် ) is a township in Hkamti District in the Sagaing Region of Burma. The principal town is Homalin. ,
Sagaing Region
Sagaing Region ( my, စစ်ကိုင်းတိုင်းဒေသကြီး, ; formerly Sagaing Division) is an administrative region of Myanmar, located in the north-western part of the country between latitude 21° 30' north and lon ...
,
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
. The biggest one, named Homemalynn 1, is in girth and tall. The second biggest one, named Homemalynn 2, is in girth.
Previously, the world's biggest recorded teak tree was located within the
Parambikulam Wildlife Sanctuary
Parambikulam Tiger Reserve, which also includes the erstwhile Parambikulam Wildlife Sanctuary, is a protected area lying in Palakkad district and Thrissur district of Kerala state, South India. The Wildlife Sanctuary, which had an area of wa ...
in the
Palakkad District
Palakkad District () is one of the 14 districts in the Indian state of Kerala. It was carved out from the southeastern region of the former Malabar District on 1 January 1957. It is located at the centre of Kerala. It is the largest district i ...
of
Kerala
Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...
in India, named Kannimara. The tree is approximately tall. Its age is between 450–500 years and is considered one of the oldest teak trees in the world.
In 2017, a tree was discovered in the Ottakallan area of the Thundathil range of the Malayattoor Forest Division in Kerala with a girth of and height of .
A teak tree in Kappayam, Edamalayar, Kerala, which used to be considered the biggest, has a girth of only 7.23 meters.
Tree No 23 is the oldest planted teak on earth. It is located in Conolly's plot (the world’s oldest teak plantation),
Nilambur
Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
, Kerala.
References
External links
*
*U.S. Forest Products Lab
USDA Forest Service
{{Taxonbar, from=Q156938
Teak
Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
Plants described in 1782
Tectona grandis
Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
Tectona grandis
Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
Tectona grandis
Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
Tectona grandis
Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
Wood
Forestry in Indonesia
Forestry in Myanmar
Plant dyes