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Thryptomene Decussata
''Thryptomene decussata'' is a species of flowering plant in the family Myrtaceae and is endemic to Western Australia. It is an erect shrub with upward pointing, egg-shaped leaves, and white or pink flowers with five petals and twenty to thirty stamens in two whorls. Description ''Thryptomene decussata'' is an erect, open shrub that typically grows to a height of , often with large galls on the stems and flowers. Its leaves are pointed upwards and broadly egg-shaped with the narrower end towards the base, long and wide on a petiole long. The flowers are arranged in pairs in up to three adjacent leaf axils, on peduncles about long with bracteoles long that remain until the fruit falls. The flowers are in diameter and cup-shaped with egg-shaped, pinkish sepals long and wide. The petals are pink, long and there are twenty to thirty stamens in two whorls, some with filaments up to long. Flowering occurs from May to November. Taxonomy This species was first formally de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrtaceae
Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire (i.e., without a toothed margin). The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous. Evolutionary history Scientists hypothesize that the family Myrtaceae arose between 60 and 56 million years ago (Mya) during the Paleocene era. Pollen fossils have been sourced to the ancient supercontinent Gondwana. The breakup of Gondwana during the Cretaceous period (145 to 66 Mya) geographically isolated disjunct taxa and allowed for rapid speciation; i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decussate
Decussation is used in biological contexts to describe a crossing (due to the shape of the Roman numeral for ten, an uppercase 'X' (), ). In Latin anatomical terms, the form is used, e.g. . Similarly, the anatomical term chiasma is named after the Greek uppercase 'Χ' (chi). Whereas a decussation refers to a crossing within the central nervous system, various kinds of crossings in the peripheral nervous system are called chiasma. Examples include: * In the brain, where nerve fibers obliquely cross from one lateral side of the brain to the other, that is to say they cross at a level other than their origin. See for examples Decussation of pyramids and sensory decussation. In neuroanatomy, the term ''chiasma'' is reserved for crossing of- or within nerves such as in the optic chiasm. * In botanical leaf taxology, the word ''decussate'' describes an opposite pattern of leaves which has successive pairs at right angles to each other (i.e. rotated 90 degrees along the stem when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosids Of Western Australia
The rosids are members of a large clade (monophyletic group) of flowering plants, containing about 70,000 species, more than a quarter of all angiosperms. The clade is divided into 16 to 20 orders, depending upon circumscription and classification. These orders, in turn, together comprise about 140 families. Fossil rosids are known from the Cretaceous period. Molecular clock estimates indicate that the rosids originated in the Aptian or Albian stages of the Cretaceous, between 125 and 99.6 million years ago. Today's forests are highly dominated by rosid species, which in turn helped with diversification in many other living lineages. Additionally, rosid herbs and shrubs are also a significant part of arctic/alpine, temperate floras, aquatics, desert plants, and parasites. Name The name is based upon the name "Rosidae", which had usually been understood to be a subclass. In 1967, Armen Takhtajan showed that the correct basis for the name "Rosidae" is a description of a group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thryptomene
''Thryptomene'' is a genus of flowering plants in the family Myrtaceae and is endemic to Australia. Plants in the genus ''Thryptomene'' are shrubs with small leaves arranged in opposite pairs and white or pink flowers. About forty-seven species of ''Thryptomene'', occurring in all Australian states and the Northern Territory, have been formally described. Description Plants in the genus ''Thryptomene'' are erect, slender shrubs typically growing to a height of with small leaves arranged in opposite pairs with oil glands especially visible on the lower surface. The flowers are usually arranged singly or in pairs in leaf axils, and usually have five sepals, five white or pink petals and five, rarely ten or fifteen stamens. The fruit is a nut usually containing a single seed. Taxonomy The genus ''Thryptomene'' was first formally described in 1838 by Stephan Ladislaus Endlicher in ''Stirpium Australasicarum Herbarii Hugeliani Decades Tres'', published in the journal ''Annalen d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Department Of Parks And Wildlife (Western Australia)
The Department of Parks and Wildlife (DPaW) was the department of the Government of Western Australia responsible for managing lands described in the ''Conservation and Land Management Act 1984'' and implementing the state's conservation and environment legislation and regulations. The minister responsible for the department was the Minister for the Environment. History The Department of Environment and Conservation (DEC) was separated on 30 June 2013, forming the Department of Parks and Wildlife (DPaW) and the Department of Environment Regulation (DER), both of which commenced operations on 1 July 2013. DPaW focused on managing multiple use state forests, national parks, marine parks and reserves. DER focused on environmental regulation, approvals and appeals processes, and pollution prevention. It was announced on 28 April 2017 that the Department of Parks and Wildlife would merge with the Botanic Gardens and Parks Authority, the Zoological Parks Authority and the Rott ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBRA
The Interim Biogeographic Regionalisation for Australia (IBRA) is a biogeographic regionalisation of Australia developed by the Australian government's Department of Sustainability, Environment, Water, Population, and Communities. It was developed for use as a planning tool, for example for the establishment of a national reserve system. The first version of IBRA was developed in 1993–94 and published in 1995. Within the broadest scale, Australia is a major part of the Australasia biogeographic realm, as developed by the World Wide Fund for Nature. Based on this system, the world is also split into 14 terrestrial habitats, of which eight are shared by Australia. The Australian land mass is divided into 89 bioregions and 419 subregions. Each region is a land area made up of a group of interacting ecosystems that are repeated in similar form across the landscape. IBRA is updated periodically based on new data, mapping improvements, and review of the existing scheme. The most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yalgoo (biogeographic Region)
Yalgoo is an interim Australian bioregion located in Western Australia. It has an area of . The bioregion, together with the Avon Wheatbelt and Geraldton Sandplains bioregions, is part of the larger Southwest Australia savanna ecoregion as classified by the World Wildlife Fund. Geography The Yalgoo bioregion extends southeastwards from the southern end of Shark Bay on Australia's west coast nearly to Lake Barlee in the interior of Western Australia. The western portion, known as the Edel subregion, includes the Edel Land peninsula and Dirk Hartog, Bernier, and Dorre islands, which enclose Shark Bay on the west. It also includes the coastal plain south of Shark Bay nearly to Kalbarri, where it transitions to the Geraldton Sandplains bioregion. The Edel subregion rests on the Carnarvon and Perth sedimentary basins. The Zuytdorp Cliffs line the coast from the northern end of Edel Land to the mouth of the Murchison River. Soils are generally white sands along the coast, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murchison (biogeographic Region)
The Murchison is an interim Australian bioregion located within the Mid West of Western Australia. The bioregion is loosely related to the catchment area of the Murchison River and has an area of . Traditionally the region is known as ''The Murchison''. Geography The landscape is characterised by low hills and mesas, separated by colluvium flats and alluvial plains. The western portion of the bioregion is drained by the upper Murchison and Wooramel rivers, which drain westwards towards the coast.Anthony Desmond, Mark Cowan and Alanna Chant (2001). "Murchison 2 (MUR2 – Western Murchison subregion)", in ''A Biodiversity Audit of Western Australia’s 53 Biogeographical Subregions in 2002''. The Department of Conservation and Land Management, Government of Western Australia, November 2001/ref> Together with Gascoyne bioregion, it constitutes the Western Australian mulga shrublands ecoregion. Population is scattered; the largest population centres are Meekatharra, Mount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gascoyne (biogeographic Region)
Gascoyne is an interim Australian bioregion located in Western Australia. It has an area of . Together with Murchison bioregion to the south, it constitutes the Western Australian Mulga shrublands ecoregion, as assessed by the World Wildlife Fund. Subregions It has three subregions named after localities or areas in the region: *Ashburton GAS01 3,687,030 hectares (9,110,800 acres) *Carnegie GAS02 4,718,656 hectares (11,660,050 acres) *Augustus GAS03 9,669,571 hectares (23,894,030 acres) Protected areas Protected areas in the bioregion include: * Barlee Range Nature Reserve * Birriliburu Indigenous Protected Area * Collier Range National Park * Mount Augustus National Park Mount Augustus National Park is located 852 km north of Perth, 490 km by road east of Carnarvon and 390 km northwest of Meekatharra, in the Gascoyne region of Western Australia. Mount Augustus itself, the feature around which th ... References Further reading * Thackway, R an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnarvon (biogeographic Region)
The Carnarvon xeric shrublands is a deserts and xeric shrublands ecoregion of Western Australia. The ecoregion is coterminous with the Carnarvon Interim Biogeographic Regionalisation for Australia (IBRA) bioregion.IBRA Version 6.1 data Location and description The ecoregion covers an area of 90,500 square kilometers (34,900 square miles) from the bounded by the to the west from the in up to the |
Leonora, Western Australia
Leonora is a town in the Goldfields-Esperance region of Western Australia, located northeast of the state capital, Perth, and north of the city of Kalgoorlie. History The first European explorer to visit the area was John Forrest in 1869. On 21 June 1869 Forrest's party made camp near a conspicuous hill, which Forrest named Mount Leonora, after his six-year-old niece Frances (Fanny) Leonora Hardey. In 1895, gold was discovered in the area by prospector Edward "Doodah" Sullivan at the Johannesburg lease just north of the current townsite. In the following two years a number of rich finds resulted in rapid development of the area. The Sons of Gwalia gold mine brought Leonora to the attention of the world. By 1897 a residential and business area had been established, and the town was gazetted as Leonora. Leonora had a single track passenger tramway linking the town and nearby Gwalia, from 1901 to 1921. Initially steam driven, the service was electric from November 1908, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark Bay
Shark Bay (Malgana: ''Gathaagudu'', "two waters") is a World Heritage Site in the Gascoyne region of Western Australia. The http://www.environment.gov.au/heritage/places/world/shark-bay area is located approximately north of Perth, on the westernmost point of the Australian continent. UNESCO's official listing of Shark Bay as a World Heritage Site reads: : History The record of Australian Aboriginal occupation of Shark Bay extends to years BP. At that time most of the area was dry land, rising sea levels flooding Shark Bay between BP and BP. A considerable number of aboriginal midden sites have been found, especially on Peron Peninsula and Dirk Hartog Island which provide evidence of some of the foods gathered from the waters and nearby land areas. An expedition led by Dirk Hartog happened upon the area in 1616, becoming the second group of Europeans known to have visited Australia. (The crew of the ''Duyfken'', under Willem Janszoon, had visited Cape York in 1606). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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