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Pandanus Sechellarum
''Pandanus sechellarum'' ("Vakwa maron", also spelled "Vacoa marron") is a species of plant in the Pandan, or Screwpine Family (Pandanaceae). It is one of five species of ''Pandanus'' that are endemic to Seychelles. Description This large species (up to 15 meters in height) has extremely large and prominent stilt-roots, that grow individually and far apart, from high up on the trunk. They can be up to thirty-three feet (ten meters) in length, and sometimes "over twelve meters" (over 39 feet). \ exceeded in length only by some banyan (Ficus spp) roots. Its medium-sized (30 cm), spherical fruit-body contains about 70 individual fruit segments, called pyrenes and hangs from the stem on a stalk. Distribution and habitat ''Pandanus sechellarum'' was formerly one of the most common species in the indigenous vegetation of the Seychelles, to which it is endemic. Currently it is usually found on steep terrain, river valleys or in accessible mountain tops. Other indigenous ''Pandan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaac Bayley Balfour
Sir Isaac Bayley Balfour, Knight Commander of the Order of the British Empire, KBE, Fellow of the Royal Society, FRS, Fellow of the Royal Society of Edinburgh, FRSE (31 March 1853 – 30 November 1922) was a Scottish botanist. He was Regius Professor of Botany (Glasgow), Regius Professor of Botany at the University of Glasgow from 1879 to 1885, Sherardian Professor of Botany at the University of Oxford from 1884 to 1888, and Professor of Botany at the University of Edinburgh from 1888 to 1922. Early life He was the son of John Hutton Balfour, also a botanist, and Marion Spottiswood Bayley, and was born at home, 27 Inverleith Row, Edinburgh. His mother was granddaughter of George Husband Baird. He was the cousin of Sir James Crichton-Browne. Biography Balfour was educated at the Edinburgh Academy from 1864 to 1870. At this early stage his interests and abilities were in the biological sciences, which were taught to him by his father. Due to his father's post as Professor of Bota ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandanus Hornei
''Martellidendron hornei'' (''Vakwa Parasol'', or ''Vacoa Parasol'') is a species of plant in the Pandan, or Screwpine family (Pandanaceae), one of several ''Pandanus'' species that are endemic to the Seychelles. Description This species is a tall (15 meters, or 49 feet), erect tree. It has a single, tall, straight trunk, with a spreading, parasol-like canopy only near the top. Its branches usually divide into groups of three. This is not trichotomous, but probably the result of having three ranks of leaves. The multiple fruit is up to in diameter with large pyrenes. each up to in length, each containing one seed. They are mostly yellow with a green outer tip. Its stilt-roots are characteristically large but very closely packed. File:Horne's Pandanus - Pandanus hornei.jpg, Rosette detail File:Pandanus hornei stilt-roots - Vallee de Mai.jpg, The close-packed stilt-roots of two specimens Distribution and habitat ''Martellidendron hornei'' is endemic to the Seychelles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Articles Created By Polbot
280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation of things to the classes (classification). Originally, taxonomy referred only to the classification of organisms on the basis of shared characteristics. Today it also has a more general sense. It may refer to the classification of things or concepts, as well as to the principles underlying such work. Thus a taxonomy can be used to organize species, documents, videos or anything else. A taxonomy organizes taxonomic units known as "taxa" (singular "taxon"). Many are hierarchies. One function of a taxonomy is to help users more easily find what they are searching for. This may be effected in ways that include a library classification system and a search engine taxonomy. Etymology The word was coined in 1813 by the Swiss botanist A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of Seychelles
Endemism is the state of a species being found only 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 elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becoming ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerable Plants
Vulnerable may refer to: General *Vulnerability *Vulnerability (computing) * Vulnerable adult *Vulnerable species Music Albums * ''Vulnerable'' (Marvin Gaye album), 1997 * ''Vulnerable'' (Tricky album), 2003 * ''Vulnerable'' (The Used album), 2012 Songs * "Vulnerable" (Roxette song), 1994 * "Vulnerable" (Selena Gomez song), 2020 * "Vulnerable", a song by Secondhand Serenade from '' Awake'', 2007 * "Vulnerable", a song by Pet Shop Boys from '' Yes'', 2009 * "Vulnerable", a song by Tinashe from '' Black Water'', 2013 * "Vulnerability", a song by Operation Ivy from ''Energy'', 1989 Other uses * Climate change vulnerability Climate change vulnerability is a concept that describes how strongly people or ecosystems are likely to be affected by climate change. Its formal definition is the " propensity or predisposition to be adversely affected" by climate change. It can ..., vulnerability to anthropogenic climate change used in discussion of society's response to climate change * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of Seychelles
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 a tree may be narrower, e.g., including only woody plants with secondary growth, only plants that are usable as lumber, or only plants above a specified height. But wider definitions include taller palms, tree ferns, bananas, and bamboos. 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 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 trees reaching several thousand years old. Trees evolved around 400 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandanus Utilis
''Pandanus utilis'', the common screwpine is, despite its name, a monocot and not a pine. It is native to Madagascar and naturalised in Mauritius and the Seychelles. Description The trunk features aerial prop roots. The leaves are linear and spiny, with a spiral arrangement on the tree. The leaves are also dried out and rolled, and used to make mats in Kerala, India; and Hawaii. Care must be taken when handling the leaves because of their sharp spines. The fruit of ''Pandanus utilis'' is edible, although not flavorful to humans and must be cooked prior to consumption. It attracts mammals such as, in North America, squirrels. Introduction Within the family Pandanaceae, the genus ''Pandanus'' is thought to compose the largest group of plants.M. H. Zimmerman, et al., "Vascular Construction and Development in the Stems of Certain Pandanaceae," ''Botanical Journal of the Linnean Society'' 68:1 (January 1974): 21-41 It is estimated that there are somewhere between 500 and 1,000 spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandanus Multispicatus
''Pandanus multispicatus'' (Vakwa de Montanny) is a species of plant in the family Pandanaceae, one of several ''Pandanus'' species that are endemic to the Seychelles. Description This is the only ''Pandanus'' of Seychelles that does not become a tree, but rather grows as a low (max 4 meters high), sprawling shrub, the thin stems often lying decumbent along the ground. The fruit bodies resemble corn cobs. Each contains 200-400 individual fruit segments, and several fruit bodies are born together on a stalk. Distribution and habitat It grows mainly in rocky areas and was previously very common in the higher mountains of Seychelles (the reason for its local name, "Vakwa de Montanny"). Formerly widespread, it is currently restricted to only eight small and isolated populations. Other indigenous ''Pandanus'' of the Seychelles include ''Pandanus sechellarum'', ''Pandanus hornei'' and ''Pandanus balfourii''. The Madagascan species ''Pandanus utilis ''Pandanus utilis'', the common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandanus Balfourii
''Pandanus balfourii'', also known as , is a species of plant in the family Pandanaceae, one of four ''Pandanus'' species that are Endemism, endemic to the Seychelles. Description ''Pandanus balfourii'' is a small, slender, elegant tree of about 8 meters in height, with small supporting roots, and bearing its drooping leaves in spiral rosettes. Its medium-sized fruit-body (25 cm) hangs from the stem and contain 70-90 individual fruits. Distribution and habitat It is Endemism, endemic to Seychelles, and was especially common on all the granitic islands. It was formerly extremely common along the coast, and its local name refers to this habitat preference. However, it has been known to live in more rocky areas at higher altitudes too. It is threatened by habitat loss. Other indigenous ''Pandanus'' of the Seychelles include ''Pandanus sechellarum'', ''Pandanus hornei'' and ''Pandanus multispicatus''. The Madagascan species ''Pandanus utilis'' is introduced and is now also w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant
Plants are the eukaryotes that form the Kingdom (biology), kingdom Plantae; they are predominantly Photosynthesis, photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria to produce sugars from carbon dioxide and water, using the green pigment chlorophyll. Exceptions are parasitic plants that have lost the genes for chlorophyll and photosynthesis, and obtain their energy from other plants or fungi. Most plants are multicellular organism, multicellular, except for some green algae. Historically, as in Aristotle's biology, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. Definitions have narrowed since then; current definitions exclude fungi and some of the algae. By the definition used in this article, plants form the clade Viridiplantae (green plants), which consists of the green algae and the embryophytes or land plants (hornworts, liverworts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrenes
Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is . This yellow-green solid is the smallest peri-fused PAH (one where the rings are fused through more than one face). Pyrene forms during incomplete combustion of organic compounds. Occurrence and properties Pyrene was first isolated from coal tar, where it occurs up to 2% by weight. As a peri-fused PAH, pyrene is much more resonance-stabilized than its five-member-ring containing isomer fluoranthene. Therefore, it is produced in a wide range of combustion conditions. For example, automobiles produce about 1 μg/km.Senkan, Selim and Castaldi, Marco (2003) "Combustion" in ''Ullmann's Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim. Reactions Oxidation with chromate affords perinaphthenone and then naphthalene-1,4,5,8-tetracarboxylic acid. Pyrene undergoes a series of hydrogenation reactions and is susceptible to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandanus Sechellarum - Seychelles Botanical Garden 2
''Pandanus'' is a genus of monocots with about 578 accepted species. They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics. Common names include pandan, screw palm and screw pine. The genus is classified in the order Pandanales, family Pandanaceae, and is the largest in the family. Description The species vary in size from small shrubs less than tall, to medium-sized trees tall, typically with a broad canopy, heavy fruit, and moderate growth rate. The trunk is stout, wide-branching, and ringed with many leaf scars. Mature plants can have branches. Depending on the species, the trunk can be smooth, rough, or warty. The roots form a pyramidal tract to hold the trunk. They commonly have many thick stilt roots near the base, which provide support as the tree grows top-heavy with leaves, fruit, and branches. These roots are adventitious and often branched. The top of the plant has one or more crowns of strap-shaped leaves that may be spi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
