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Orchidaceae
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"Orchid" redirects here. For other uses, see Orchid (disambiguation).
Orchidaceae
Fossil range: 80 Ma PreЄЄOSDCPTJKPgN↓Late Cretaceous - Recent
Color plate from Ernst Haeckel's Kunstformen der Natur
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Asparagales
Family: Orchidaceae
Juss.
Subfamilies
Apostasioideae Horaninov
Cypripedioideae Kosteletzky
Epidendroideae Kosteletzky
Orchidoideae Eaton
Vanilloideae Szlachetko
Distribution range of family Orchidaceae
Orchidaceae, commonly referred to as the Orchid family, is a morphologically diverse and widespread family of monocots. It is currently believed to be the second largest family of flowering plants (only the Asteraceae is larger), with between 21,950 and 26,049 currently accepted species, found in 880 genera.[1][2] The number of orchid species equals more than twice the number of bird species, and about four times the number of mammal species. It also encompasses about 6–11% of all seed plants.[3] The largest genera are Bulbophyllum (2,000 species), Epidendrum (1,500 species), Dendrobium (1,400 species) and Pleurothallis (1,000 species).
The family also includes Vanilla (the genus of the vanilla plant), Orchis (type genus) and many commonly cultivated plants such as Phalaenopsis and Cattleya. Moreover, since the introduction of tropical species in the 19th century, horticulturists have produced more than 100,000 hybrids and cultivars.
The complex mechanisms which orchids evolve to achieve cross-pollination were investigated by Charles Darwin and described in his 1862 book Fertilisation of Orchids.
Contents [hide]
1 Etymology
2 Distribution
3 Taxonomy
4 Characteristics
4.1 Stem and roots
4.2 Leaves
4.3 Flowers
4.4 Fruits and seeds
5 Reproduction
5.1 Pollination
5.2 Asexual reproduction
6 Evolution
7 Ecology
8 Uses
9 Genera
10 Gallery
11 See also
12 References
13 External links
[edit] Etymology
The name comes from the Greek "órkhis", literally meaning "testicle", because its root has a similar shape.[4][5] The term was introduced in 1845 by John Lindley in "School Botany".[5]
[edit] Distribution
Orchidaceae are cosmopolitan, occurring in almost every habitat apart from glaciers. The great majority are to be found in the tropics, mostly Asia, South America and Central America, but they are also found above the Arctic Circle, in southern Patagonia, and even two species of Nematoceras on Macquarie Island, close to Antarctica.
The following list gives a rough overview of their distribution:
tropical America: 250 to 270 genera
tropical Asia: 260 to 300 genera
tropical Africa: 230 to 270 genera
Oceania: 50 to 70 genera
Europe and temperate Asia: 40 to 60 genera
North America: 20 to 26 genera
[edit] Taxonomy
Main article: Taxonomy of the Orchid family
The taxonomy of this family is in constant flux, as new studies continue to identify more classificatory elements. The Orchidaceae is currently placed in the order Asparagales by the APG III system of 2009.
Five subfamilies are recognised. The cladogram has been made according to the APG system:
Apostasioideae: 2 genera and 16 species, south-western Asia
Cypripedioideae: 5 genera and 130 species, from the temperate regions of the world, as well as tropical America and tropical Asia
Monandrae
Vanilloideae: 15 genera and 180 species, humid tropical and subtropical regions, eastern North America
Epidendroideae: more than 500 genera and more or less 20,000 species, cosmopolitan
Orchidoideae: 208 genera and 3,630 species, cosmopolitan
[edit] Characteristics
Orchids are easily distinguished from other plants, as they share some very evident apomorphies. Among these: bilaterally symmetric (zygomorphic), many resupinate, one petal (labellum) is always highly modified, stamens and carpels are fused, and the seeds are extremely small.
[edit] Stem and roots
All orchids are perennial herbs and lack any permanent woody structure. Orchids can grow according to two patterns:
Monopodial: The stem grows from a single bud, leaves are added from the apex each year and the stem grows longer accordingly. The stem of orchids with a monopodial growth can reach several metres in length, as in Vanda and Vanilla.
Sympodial: The plant produces a series of adjacent shoots which grow to a certain size, bloom and then stop growing, to be then replaced. Sympodial orchids grow laterally rather than vertically, following the surface of their support. The growth continues by development of new leads, with their own leaves and roots, sprouting from or next to those of the previous year, as in Cattleya. While a new lead is developing, the rhizome may start its growth again from a so-called 'eye', an undeveloped bud, thereby branching.
Anacamptis lactea showing the two tubersTerrestrial orchids may be rhizomatous or form corms or tubers. The root caps of terrestrials are smooth and white.
Some sympodial terrestrials, such as Orchis and Ophrys, have two subterranean tuberous roots. One is used as a food reserve for wintry periods, and provides for the development of the other one, from which visible growth develops.
In warm and humid climates, many terrestrial orchids do not need pseudobulbs.
Epiphytic orchids have modified aerial roots that can sometimes be a few meters long. In the older parts of the roots, a modified spongy epidermis called velamen has the function to absorb humidity. It is made of dead cells and can have a silvery-grey, white or brown appearance. In some orchids the velamen includes spongy and fibrous bodies near the passage cells. These structures are named tilosomes.
The cells of the root epidermis grow at a right angle to the axis of the root to allow them to get a firm grasp on their support. Nutrients mainly come from animal droppings and other organic detritus on their supporting surface.
The pseudobulb of Prosthechea fragransThe base of the stem of sympodial epiphytes, or in some species essentially the entire stem, may be thickened to form what is called a pseudobulb that contains nutrients and water for drier periods.
The pseudobulb has a smooth surface with lengthwise grooves and can have different shapes, often conical or oblong. Its size is very variable; in some small species of Bulbophyllum it is no longer than two millimeters, while in the largest orchid in the world, Grammatophyllum speciosum (giant orchid), it can reach three meters. Some Dendrobium have long, canelike pseudobulbs with short, rounded leaves over the whole length, some other orchids have hidden or extremely small pseudobulbs, completely included inside the leaves.
With ageing the pseudobulb sheds its leaves and becomes dormant. At this stage it is often called a backbulb. A pseudobulb then takes over, exploiting the last reserves accumulated in the backbulb, which eventually dies off too. A pseudobulb typically lives for about five years.
[edit] Leaves
A close-up of a Phalaenopsis orchid leaf; the parallel veins and cuticle are visible.Like most monocots, orchids generally have simple leaves with parallel veins, although some Vanilloideae have a reticulate venation. Leaves may be ovate, lanceolate, or orbiculate, and very variable in size. Their characteristics are often diagnostic. They are normally alternate on the stem, often plicate, and have no stipules. Orchid leaves often have siliceous bodies called stegmata in the vascular bundle sheaths (not present in the Orchidoideae) and are fibrous.
The structure of the leaves corresponds to the specific habitat of the plant. Species that typically bask in sunlight, or grow on sites which can be occasionally very dry, have thick, leathery leaves and the laminas are covered by a waxy cuticle to retain their necessary water supply. Shade species, on the other hand, have long, thin leaves.
The leaves of most orchids are perennial, that is they live for several years, while others, especially those with plicate leaves, shed them annually and develop new leaves together with new pseudobulbs, as in Catasetum.
The leaves of some orchids are considered ornamental. The leaves of the Macodes sanderiana, a semiterrestrial or lithophyte, show a sparkling silver and gold veining on a light green background. The cordate leaves of Psychopsiella limminghei are light brownish green with maroon-puce markings, created by flower pigments. The attractive mottle of the leaves of Lady's Slippers from tropical and subtropical Asia, (Paphiopedilum) is caused by uneven distribution of chlorophyll. Also Phalaenopsis schilleriana is a pastel pink orchid with leaves spotted dark green and light green. The Jewel Orchid (Ludisia discolor) is grown more for its colorful leaves than its fairly inconspicuous white flowers.
Some orchids, as Dendrophylax lindenii (Ghost Orchid), Aphyllorchis and Taeniophyllum depend on their green roots for photosynthesis and lack normally developed leaves, as do all of the heterotrophic species.
[edit] Flowers
Dactylorhiza sambucina, Orchidoideae for referenceOrchidaceae are well known for the many structural variations in their flowers.
Some orchids have single flowers but most have a racemose inflorescence, sometimes with a large number of flowers. The flowering stem can be basal, that is produced from the base of the tuber, like in Cymbidium, apical, meaning it grows from the apex of the main stem, like in Cattleya, or axillary, from the leaf axil, as in Vanda.
As an apomorphy of the clade, orchid flowers are primitively zygomorphic (bilaterally symmetrical), although in some genera like Mormodes, Ludisia, Macodes this kind of symmetry may be difficult to notice.
The orchid flower, like most flowers of monocots, has two whorls of sterile elements. The outer whorl has three sepals and the inner whorl has three petals. The sepals are usually very similar to the petals (and thus called tepals, 1), but may be completely distinct.
The upper medial petal, called the labellum or lip (6), is always modified and enlarged. The inferior ovary (7) or the pedicel usually rotates 180 degrees, so that the labellum, goes on the lower part of the flower, thus becoming suitable to form a platform for pollinators. This characteristic, called resupination occurs primitively in the family and is considered apomorphic (the torsion of the ovary is very evident from the picture). Some orchids have secondarily lost this resupination, e. g. Zygopetalum and Epidendrum secundum.
The normal form of the sepals can be found in Cattleya, where they form a triangle. In Paphiopedilum (Venus slippers) the lower two sepals are fused together into a synsepal, while the lip has taken the form of a slipper. In Masdevallia all the sepals are fused.
Orchid flowers with abnormal numbers of petals or lips are called peloric. Peloria is a genetic trait, but its expression is environmentally influenced and may appear random.
Longitudinal section of a flower of Vanilla planifoliaOrchid flowers primitively had three stamens, but this situation is now limited to the genus Neuwiedia. Apostasia and the Cypripedioideae have two stamens, the central one being sterile and reduced to a staminode. All of the other orchids, the clade called Monandria, retain only the central stamen, the others being reduced to staminodes (4). The filaments of the stamens are always adnate (fused) to the style to form cylindrical structure called the gynostemium or column (2). In the primitive Apostasioideae this fusion is only partial, in the Vanilloideae it is more deep, while in Orchidoideae and Epidendroideae it is total. The stigma (9) is very asymmetrical as all of its lobes are bent towards the centre of the flower and lay on the bottom of the column.
Pollen is released as single grains, like in most other plants, in the Apostasioideae, Cypripedioideae and Vanilloideae. In the other subfamilies, that comprise the great majority of orchids, the anther (3), carries and two pollinia.
A pollinium is a waxy mass of pollen grains held together by the glue-like alkaloid viscin, containing both cellulosic stands and mucopolysaccharides. Each pollinium is connected to a filament which can take the form of a caudicle, like in Dactylorhiza or Habenaria or a stipe, like in Vanda. Caudicles or stipes hold the pollinia to the viscidium, a sticky pad which sticks the pollinia to the body of pollinators.
At the upper edge of the stigma of single-anthered orchids, in front of the anther cap, there is the rostellum (5), a slender extension involved in the complex pollination mechanism.
As aforementioned, the ovary is always inferior (located behind the flower). It is three-carpelate and one or, more rarely, three-partitioned, with parietal placentation (axile in the Apostasioideae).
[edit] Fruits and seeds
Cross-section of an orchid capsule, the longitudinal slitsThe ovary typically develops into a capsule that is dehiscent by 3 or 6 longitudinal slits, while remaining closed at both ends. The ripening of a capsule can take 2 to 18 months.
The seeds are generally almost microscopic and very numerous, in some species over a million per capsule. After ripening they blow off like dust particles or spores. They lack endosperm and must enter symbiotic relationship with various mycorrhizal basidiomyceteous fungi that provide them the necessary nutrients to germinate, so that all orchid species are mycoheterotrophic during germination and reliant upon fungi to complete their lifecycle.
As the chance for a seed to meet a fitting fungus is very small, only a minute fraction of all the seeds released grow into an adult plant. In cultivation, germination typically takes weeks, while there is a report of one paphiopedilum that took fifteen years.
Horticultural techniques have been devised for germinating seeds on a nutrient-containing gel, eliminating the requirement of the fungus for germination, greatly aiding the propagation of ornamental orchids.
The main component for the sowing of orchids in artificial conditions is the agar agar. The substance is put together with some type of carbohydrate (actually, some kind of glucose) which provides qualitative organic feed. Such substance may be banana, pineapple, peach or even tomato puree or coconut milk. After the cooking of the agar agar (it has to be cooked in sterile conditions) the mix is poured into test tubes or jars where the substance begins to jelly. The seeds have to be put in the dish above boiling water, in the steam because that secures sterile conditions. The test tubes are put diagonally after that.
[edit] Reproduction
[edit] Pollination
Orchids have developed highly specialized pollination systems and thus the chances of being pollinated are often scarce. This is why orchid flowers usually remain receptive for very long periods and why most orchids deliver pollen in a single mass; each time pollination succeeds thousands of ovules can be fertilized.
Pollinators are often visually attracted by the shape and colours of the labellum. The flowers may produce attractive odours. Although absent in most species, nectar may be produced in a spur (8) of the labellum, on the point of the sepals or in the septa of the ovary, the most typical position amongst the Asparagales.
In orchids that produce pollinia, pollination happens as some variant of the following. When the pollinator enters into the flower, it touches a viscidium, which promptly sticks to its body, generally on the head or abdomen. While leaving the flower, it pulls the pollinium out of the anther, as it is connected to the viscidium by the caudicle or stipe. The caudicle then bends and the pollinium is moved forwards and downwards. When the pollinator enters another flower of the same species, the pollinium has taken such position that it will stick to the stigma of the second flower, just below the rostellum, pollinating it. The possessors of orchids may be able to reproduce the process with a pencil, small paintbrush, or other similar device.
Ophrys apifera is about to self-pollinateSome orchids mainly or totally rely on self-pollination, especially in colder regions where pollinators are particularly rare. The caudicles may dry up if the flower hasn't been visited by any pollinator and the pollina then fall directly on the stigma. Otherwise the anther may rotate and then enter the stigma cavity of the flower (as in Holcoglossum amesianum).
The labellum of the Cypripedioideae is poke-shaped and has the function to trap visiting insects. The only exit leads to the anthers that deposit pollen on the visitor.
In some extremely specialized orchids, like the Eurasian genus Ophrys, the labellum is adapted to have a colour, shape and odour which attracts male insects via mimicry of a receptive female. Pollination happens as the insect attempts to mate with flowers.
Many neotropical orchids are pollinated by male orchid bees, which visit the flowers to gather volatile chemicals they require to synthesize pheromonal attractants. Each type of orchid places the pollinia on a different body part of a different species of bee, so as to enforce proper cross-pollination.
An underground orchid in Australia, Rhizanthella slateri, never sees the light of day and depends on ants and other terrestrial insects to pollinate it.
Catasetum, a genus discussed briefly by Darwin actually launches its viscid pollinia with explosive force when an insect touches a seta, knocking the pollinator off the flower.
After pollination the sepals and petals fade and wilt, but they usually remain attached to the ovary.
[edit] Asexual reproduction
Some species, as some Phalaenopsis, Dendrobium and Vanda, produce offshoots or plantlets formed from one of the nodes along the stem, through the accumulation of growth hormones at that point. These shoots are known as keiki.
[edit] Evolution
A study in the scientific journal Nature [6] has hypothesized that the origin of orchids goes back much longer than originally expected. An extinct species of stingless bee, Proplebeia dominicana, was found trapped in Miocene amber from about 15-20 million years ago. The bee was carrying pollen of a previously unknown orchid taxon, Meliorchis caribea, on its wings. This find is the first evidence of fossilised orchids to date.[6]
The extinct orchid M. caribea has been placed within the extant tribe Cranichideae, subtribe Goodyerinae (subfamily Orchidoideae).
This indicates that orchids may have an ancient origin and have arisen 76 to 84 million years ago during the Late Cretaceous. In other words, they may have co-existed with dinosaurs. It shows also that at that time insects were active pollinators of orchids. According to M.W. Chase et al. (2001) the overall biogeography and phylogenetic patterns of Orchidaceae show that they are even older and may go back roughly 100 million years [7]
Using the molecular clock method, it was possible to determine the age of the major branches of the orchid family. This also confirmed that the subfamily Vanilloideae is a branch at the basal dichotomy of the monandrous orchids, and must have evolved very early in the evolution of the family. Since this genus occurs worldwide in tropical and subtropical regions, from tropical America to tropical Asia, New Guinea and West Africa, and the continents began to split about 100 million years ago, significant biotic exchange must have occurred after this split (since the age of Vanilla is estimated at 60 to 70 million years).
[edit] Ecology
A majority of orchids are perennial epiphytes, which grow anchored to trees or shrubs in the tropics and subtropics. Other species are lithophytes, growing on rocks or very rocky soil, or are terrestrial. Nearly all temperate orchids are terrestrial.
Some orchids, like Neottia and Corallorhiza, lack chlorophyll and are unable to photosynthesize. Instead, these species obtain energy and nutrients by parasitising soil fungi through the formation of orchid mycorrhizas. The fungi involved include those that form ectomycorrhizas with trees and other woody plants, parasites such as Armillaria, and saprotrophs.[8] These orchids are known as myco-heterotrophs, but were formerly (incorrectly) described as saprophytes due to the belief that they gained their nutrition by breaking down organic matter. While only a few species are achlorophyllous holoparasites, all orchids are myco-heterotrophic during germination and seedling growth and even photosynthetic adult plants may continue to obtain carbon from their mycorrhizal fungi.
[edit] Uses
Further information: Vanilla
Vanilla fruits dryingOne orchid genus, Vanilla, is commercially important, used as a flavouring.
The underground tubers of terrestrial orchids (mainly Orchis mascula (Early Purple Orchid)) are ground to a powder and used for cooking, such as in the hot beverage salep or in the Turkish ice-cream (Dondurma - salepli dondurma). It has been claimed that the name salep comes from the Arabic expression ḥasyu al-tha`lab, "fox testicles", however, it appears more likely that the Turkish name salep comes directly from the Arabic name saḥlab. The similarity in appearance to testes naturally accounts for salep being considered an aphrodisiac.
The dried leaves of Jumellea fragrans are used to flavour rum on Reunion Island.
The scent of orchids is frequently analysed by perfumers (using headspace technology and Gas-liquid chromatography) to identify potential fragrance chemicals.
The other important use of orchids is their cultivation for the enjoyment of the flowers. Most cultivated orchids are tropical or subtropical, but quite a few which grow in colder climates can be found on the market. Temperate species available at nurseries include Ophrys apifera (Bee Orchid), Gymnadenia conopsea (Fragrant Orchid), Anacamptis pyramidalis (Pyramidal Orchid) and Dactylorhiza fuchsii (Common Spotted Orchid).
Orchids of all types have also often been sought by collectors of both species and hybrids. As such many hundreds of societies and clubs worldwide have been established. These can be small local clubs like Sutherland Shire Orchid Society or larger national organisations like American Orchid Society. Both serve to encourage cultivation and collection of orchids, but some go further by concentrating on conservation or research.
The term botanical orchid loosely denotes those small flowered tropical orchids belonging to several genera (not necessarily related to each other) that don't fit into the "Florist" orchid category. A few of these genera contain enormous numbers of species. Some, such as Pleurothallis and Bulbophyllum, contain approximately 1700 and 2000 species, respectively, and are often extremely vegetatively diverse. The primary use of the term is among orchid hobbyists wishing to describe unusual species they grow, though it is also used to distinguish naturally occurring orchid species from horticulturally created hybrids.
Cultivated Phalaenopsis lindeniiA few of the most common orchids found in "casual" culture are:
Anguloa
Cattleya
Cymbidium
Laelia
Dendrobium
Phalaenopsis
Paphiopedilum
Oncidium
Vanda
Epidendrum
Brassia
Bulbophyllum
Catasetum
Sophronitis
Miltonia
Phaius
The Taiwan Orchid Nursery [9] in Pingtung, Taiwan, and The National Orchid Garden in the Singapore Botanic Gardens are considered by some to be among the finest collections of orchids in cultivation open to the public.[citation needed]
Orchids, like tulips, have become a major market throughout the world. Buyers now bid hundreds of dollars on new hybrids or improved ones. Because of their apparent ease in hybridization, they are now becoming one of the most popular cut-flowers on the market.[citation needed] Trade shows like the Taiwan International Orchid Show [10] attracted more than 200,000 visitors and 3,000 foreign floral exports and buyers from abroad. As such, some governments, including the Taiwanese, considers orchid plantation as a high-tech industry and invests in science parks like the Taiwan Orchid Plantation in Tainan County (台灣蘭花科技園區).[11]
[edit] Genera
Main article: List of Orchidaceae genera
The following are amongst the most notable genera of the orchid family:
Aa
Abdominea
Acampe
Acanthephippium
Aceratorchis
Acianthus
Acineta
Acrorchis
Ada
Aerangis
Aeranthes
Aerides
Aganisia
Agrostophyllum
Amitostigma
Anacamptis
Ancistrochilus
Angraecum
Anguloa
Ansellia
Aorchis
Aplectrum
Arethusa
Armodorum
Ascocenda
Ascocentrum
Ascoglossum
Australorchis
Auxopus
Baptistonia
Barbrodia
Barkeria
Barlia
Bartholina
Beloglottis
Biermannia
Bletilla
Brassavola
Brassia
Bulbophyllum
Calypso
Catasetum
Cattleya
Cirrhopetalum
Cleisostoma
Clowesia
Coelogyne
Coryanthes
Cymbidium
Cyrtopodium
Cypripedium
Dactylorhiza
Dendrobium
Disa
Dracula
Encyclia
Epidendrum
Epipactis
Eria
Eulophia
Gongora
Goodyera
Grammatophyllum
Gymnadenia
Habenaria
Herschelia
Ida
Laelia
Lepanthes
Liparis
Ludisia
Lycaste
Masdevallia
Maxillaria
Meliorchis
Mexipedium
Miltonia
Mormodes
Odontoglossum
Oeceoclades
Oncidium
Ophrys
Orchis
Paphiopedilum
Paraphalaenopsis
Peristeria
Phaius
Phalaenopsis
Pholidota
Phragmipedium
Platanthera
Pleione
Pleurothallis
Promenaea
Pterostylis
Renanthera
Renantherella
Restrepia
Restrepiella
Rhynchostylis
Roezliella
Saccolabium
Sarcochilus
Satyrium
Selenipedium
Serapias
Sophronitis
Spiranthes
Stanhopea
Stelis
Thrixspermum
Tolumnia
Trias (genus)
Trichocentrum
Trichoglottis
Vanda
Vanilla
Zeuxine
Zygopetalum
[edit] Gallery
Corallorhyza maculata, a myco-heterotroph
Cephalanthera longifolia, a terrestrial orchid
Leaves of different species of orchids
Habenaria radiata. Note the lip
Pterostylis coccinea, a highly specialized shape
Neuwiedia griffithii, Apostasioideae. Note the three normal stamens.
Cypripedium acaule has two stamens. One can be seen from the picture, the other is on the other side
Ophrys insectifera
Catasetum fimbriatum. The seta is evident.
Holcoglossum kimballianum
Spiranthes spiralis
Vanilla plant (the climber)
Bulbophyllum putidum
Cattleya intermedia
Cultivated Epidendrum ciliare
Dracula vampira
Rossioglossum grande
Listera ovata, a less showy orchid
Vanda tricolor var. suavis
Oncidium papilio
Cambria
Phalaenopsis hybrid
Orchids at a flower show in Tatton Park, Cheshire, England, 24 July 2008
Renanthera storei
Neottia nidus-avis, a myco-heterotroph.
Cattleya aclandiae. There is the typical zygomorphic flower with three petal-like sepals (top, lower right, lower left), two normal petals on either side and the labellum.
An orchid Leaf.
Orchid on display at American Orchid Society, Delray Beach
purple orchids at American Orchid Society, Delray Beach, FL
Orchid at Am. Orchid Soc Delray Bch
Phalaenopsis cultivar
[edit] See also
Wikinews has related news: American botanist Lou Jost discovers world's smallest orchid
Adaptation., a movie based on the Susan Orlean book The Orchid Thief
American Orchid Society
Distribution of orchid species
Moyobamba, known as the 'City of Orchids', which has some 3,500 species of orchid native to the area
Nero Wolfe, a fictional detective and orchidophile
Orchid Conservation Coalition
Orchid hunters
Orchidelirium the Victorian era of flower madness in which collecting and discovering Orchid reached extraordinary levels.
The Orchid Thief, a non-fiction book written by Susan Orlean
[edit] References
Notes
^ Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website Version 9, June 2008 Mobot.org
^ "WCSP". World Checklist of Selected Plant Families. http://apps.kew.org/wcsp/. Retrieved 2010.
^ Taxonomic exaggeration and its effects on orchid conservation
^ Corominas, Joan. "Breve Diccionario Etimológico de la Lengua Castellana". Ed. Gredos, 1980. ISBN 8424913329, pp 328
^ a b "Orchid". The Online Etymology Dictionary. http://www.etymonline.com/index.php?term=orchid. Retrieved 2010-03-25.
^ a b Santiago R. Ramírez, Barbara Gravendeel, Rodrigo B. Singer, Charles R. Marshall & Naomi E. Pierce (30 August 2007). "Dating the origin of the Orchidaceae from a fossil orchid with its pollinator". Nature 448 (7157): 1042–1042. doi:10.1038/nature06039. PMID 17728756. http://www.nature.com/nature/journal/v448/n7157/abs/nature06039.html.
^ The origin and biogeography of Orchidaceae .In Pridgeon , A.M. , Cribb, PJ ., Chase,MW, and Rasmussen , F.eds .Genera orchidacearum .Vol. 2 . pp. 1-5 Oxford University Press , Oxford
^ Leake JR. 2005. Plants parasitic on fungi: unearthing the fungi in myco-heterotrophs and debunking the 'saprophytic' plant myth. Mycologist 19: 113–122. (abstract)).
^ Taiwan Orchid Nursery
^ the Taiwan International Orchid Show
^ Taiwan Orchid Plantation in Tainan County (台灣蘭花科技園區)
[edit] External links
Wikimedia Commons has media related to: Orchidaceae
EPIDENDRA: The botanical databases of Jardín Botánico Lankester
Assembling the Orchid Tree of Life
Orchidaceae at the Angiosperm Phylogeny Website
Orchidaceae at The Families of Flowering Plants (DELTA)
Orchidaceae at the online Flora of North America
Orchidaceae at the online Flora of China
Orchidaceae at the Virtual Flora of Mongolia
Orchidaceae at Chileflora
Orchidaceae at FloraBase the Western Australian Flora
Orchidaceae at the online Flora of New Zealand
Orchid Conservation Coalition
International Orchid Register at the Royal Horticultural Society (RHS)
World Orchid Iconography at the Swiss Orchid Foundation
The North of England Orchid Society
Australian Native Orchids on Flickr
Kew Gardens video Watch the first known instance of a cricket as an orchid pollinator.
Retrieved from "http://en.wikipedia.org/wiki/Orchidaceae"
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العربية Aragonés Avañe'ẽ Azərbaycanca བོད་ཡིག Brezhoneg Български Català Česky Corsu Dansk Deutsch Eesti Ελληνικά Español Esperanto Euskara Français Galego 한국어 हिन्दी Hornjoserbsce Hrvatski Ido Bahasa Indonesia Italiano עברית Basa Jawa ქართული Kreyòl ayisyen Latina Latviešu Lëtzebuergesch Lietuvių Limburgs Magyar Македонски Malagasy മലയാളം Bahasa Melayu မြန်မာဘာသာ Nederlands नेपाली 日本語 Norsk (bokmål) Occitan ਪੰਜਾਬੀ Polski Português Română Runa Simi Русский Simple English Slovenčina Slovenščina Српски / Srpski Srpskohrvatski / Српскохрватски Suomi Svenska తెలుగు ไทย lea faka-Tonga Türkçe Українська Tiếng Việt 中文 This page was last modified on 11 December 2010 at 11:14.
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