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Calaminarian Grassland
Calaminarian grassland is grassland where the process of seral succession has been halted due to the toxicity of soils containing high levels of toxic metal ions. These habitats may be semi-natural on naturally exposed deposits, or the result of mining, or from erosion by rivers, sometimes including washed-out mine workings. In the United Kingdom calaminarian grassland is regarded as one of its 'habitats of principal importance for biodiversity conservation' and is predominantly found on industrial or post-industrial land, especially in the east of Cumbria and western dales, the Peak District and north west Wales and parts of the Scottish Highlands. Semi-natural examples are rarer and found mainly in the Highlands and Islands of Scotland. Some examples include Cwmystwyth in West Wales, Halkyn Mountain in Flintshire, Upper Teesdale in County Durham, Oxclose in Tyne and Wear, Caenlochan in eastern Scotland, the Isle of Rhum in western Scotland and Keen of Hamar in Shetland. Situ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. Furthermore, grasslands are one of the largest biomes on earth and dominate the landscape worldwide. There are different types of grasslands: natural grasslands, semi-natural grasslands, and agricultural grasslands. They cover 31–69% of the Earth's land area. Definitions Included among the variety of definitions for grasslands are: * "...any plant community, including harvested forages, in which grasses and/or legumes make up the dominant vegetation." * "...terrestrial ecosystems dominated by herbaceous and shrub vegetation, and maintained by fire, grazing, drought and/or freezing temperatures." (Pilot Assessment of Global Ecosystems, 2000) * "A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minuartia Verna
''Minuartia verna'' is a scarce species of flowering plant in the family Caryophyllaceae, known by the common names spring sandwort and leadwort. It is a small mat-forming, perennial herb. Some authorities consider it a synonym of '' Sabulina verna''. It has a Eurasian Boreal-montane distribution, typically found on Carboniferous limestone Carboniferous Limestone is a collective term for the succession of limestones occurring widely throughout Great Britain and Ireland that were deposited during the Dinantian Epoch of the Carboniferous Period. These rocks formed between 363 and ... ground. It grows in short grassland, on exposed limestone pavement, on scree slopes and on metal-rich soils, including spoil heaps from lead mining. The small (7–9 mm across), 5-petalled flowers appear on short, downy stems from spring until late summer. The slender leaves have 3 veins. References verna Flora of the United Kingdom {{Caryophyllaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom Biodiversity Action Plan
The United Kingdom Biodiversity Action Plan or (UK BAP) was the UK government's response to the Convention on Biological Diversity, opened for signature at the Rio Earth Summit in 1992. The UK was the first country to produce a national Biodiversity Action Plan. It was published in 1994 and created action plans for priority species and habitats in the UK that were most under threat so as to support their recovery. Purpose The UK Biodiversity Action Plan summarised the most threatened or rapidly declining biological resources of the United Kingdom, and gave detailed plans for their conservation. Individual 'Action Plans' were provided for these habitats and species, and a reporting mechanism was established to demonstrate how the UK BAP was contributing to the United Kingdom's commitment to help reduce or halt the significant losses in global biodiversity, highlighted by the international Convention on Biological Diversity. The original publication included action plans for 45 habi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arabis Petraea
''Arabis'' ,''Sunset Western Garden Book,'' 1995:606–607 or rockcress, is a genus of flowering plants, within the family Brassicaceae. Description The species are herbaceous, annual or perennial plants, growing to 10–80 cm tall, usually densely hairy, with simple entire to lobed leaves 1–6 cm long, and small white four-petaled flowers. The fruit is a long, slender capsule containing 10-20 or more seeds. Natural habitat for ''Arabis'' species is rocky mountain/cliff sides or dry sites. Cultivation of ''Arabis'' is best suited for rock gardens or container gardens. This genus is pollinated by members of Apieae and Lepidoptera. Taxonomy Though traditionally recognized as a large genus with many Old World and New World members, more recent evaluations of the relationships among these species using genetic data suggest there are two major groups within the old genus ''Arabis''. These two groups are not each other's closest relatives, so have been split into tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerastium Nigrescens
''Cerastium nigrescens'', commonly known as the Shetland mouse-ear, Shetland mouse-eared chickweed or Edmondston's chickweed, is an endemic flowering plant found in Shetland, Scotland. It was first recorded in 1837 by botanist Thomas Edmondston, who was 12 at the time. For a long time it was synonymised with arctic mouse-ear ''Cerastium arcticum'' but it is now widely regarded as a separate species. Although reported from two other sites in the 19th century, it currently grows only on two serpentine hills on the island of Unst Unst (; sco, Unst; nrn, Ønst) is one of the North Isles of the Shetland Islands, Scotland. It is the northernmost of the inhabited British Isles and is the third-largest island in Shetland after Mainland and Yell. It has an area of . Unst ... (see Keen of Hamar). The numbers of ''Cerastium nigrescens'' can vary dramatically from year to year, for reasons that are unclear (probably due to a varying rates of seedling germination and survival ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arenaria Norvegica
''Arenaria norvegica'', also known as Arctic, English or Norwegian sandwort, is a low growing plant in the family Caryophyllaceae, found in northwest Europe. The diploid chromosome number is 2n=80. There are two recognised subspecies.Flora of NW Europe Description ''Arenaria norvegica'' is a much branched, low-growing plant growing up to six centimetres tall. The midrib of the leaves is indistinct and the margins glabrous only in the lower third which distinguishes it from the rather similar '' Arenaria ciliata''. ;''Arenaria norvegica'' subsp. ''anglica'' ''Arenaria norvegica'' subsp. ''anglica'' is an |
Ditrichum Plumbicola
''Ditrichum'' is a genus of haplolepideous mosses (Dicranidae) in the family Ditrichaceae. Species The genus contains the following species: *'' Ditrichum amoenum'' *'' Ditrichum apophysatum'' *'' Ditrichum astomoides'' *'' Ditrichum atlanticum'' *'' Ditrichum aureum'' *'' Ditrichum austrogeorgicum'' *'' Ditrichum blindioides'' *'' Ditrichum bogotense'' *'' Ditrichum boryanum'' *'' Ditrichum brachycarpum'' *'' Ditrichum brachypodum'' *'' Ditrichum breidleri'' *'' Ditrichum brevidens'' *'' Ditrichum brevirostre'' *'' Ditrichum brevisetum'' *'' Ditrichum brotherusii'' *'' Ditrichum buchananii'' *'' Ditrichum canadense'' *'' Ditrichum canariense'' *'' Ditrichum capense'' *'' Ditrichum capillaceum'' *'' Ditrichum capillare'' *'' Ditrichum colijnii'' *'' Ditrichum conicum'' *'' Ditrichum cornubicum'' *'' Ditrichum crinale'' *''Ditrichum cylindricarpum ''Ditrichum'' is a genus of Peristome#In_mosses, haplolepideous mosses (Dicranidae) in the family Ditrich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephaloziella Nicholsonii
''Cephaloziella'' is a genus of liverworts. ''Cephaloziella varians'' (Gottsche) Steph. is the only liverwort that occurs in the continental Antarctic. Species * '' Cephaloziella acanthophora'' * '' Cephaloziella aenigmatica'' * '' Cephaloziella antillana'' * '' Cephaloziella arctogena'' * '' Cephaloziella arenaria'' * '' Cephaloziella aspericaulis'' * '' Cephaloziella aterrima'' * '' Cephaloziella baumgartneri'' * '' Cephaloziella biloba'' * '' Cephaloziella biokoensis'' * '' Cephaloziella breviperianthia'' * '' Cephaloziella brinkmanii'' * '' Cephaloziella calyculata'' * '' Cephaloziella capensis'' * '' Cephaloziella crassigyna'' * '' Cephaloziella dentata'' * '' Cephaloziella dentifolia'' * '' Cephaloziella divaricata'' * '' Cephaloziella dusenii'' * '' Cephaloziella elachista'' * '' Cephaloziella elegans'' * '' Cephaloziella exigua'' * '' Cephaloziella exiliflora'' * '' Cephaloziella flexuosa'' * '' Cephaloziella fragillima'' * '' Cephaloziella gemmata'' * '' Cephaloziella ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsupella Profunda
''Marsupella profunda'', the western rustwort, is a liverwort native to Europe and known only from Portugal (Mainland, Azores and Madeira) and Great Britain (Cornwall) and has been sighted in the Canary Islands. It is a small reddish liverwort and can be confused with '' Marsupella sprucei'' which has a more widespread distribution. Distribution and habitat ''Marsupella profunda'' is a saxicolous plant, commonly found on open but shady sites, in wet rock crevices or on slopes. It has a very disjunct population, from Santa Maria Island and Madeira Island in Macaronesia to mountainous areas in Continental Portugal, to Cornwall in England. The species was also sighted in La Palma on the Canary Islands though its presence on the archipelago is not confirmed. Less than 1000 individuals are known, occupying an area of about from in altitude. In Portugal the species is mainly reported from the Peneda-Gerês National Park, the Serra da Estrela Natural Park, the Serra de São Mamede N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ditrichum Cornubicum
''Ditrichum cornubicum'', commonly known as the Cornish path-moss, is a moss endemic to Cornwall, United Kingdom. First discovered in 1963, on a roadside west of Lanner, Cornwall by Jean Paton, it has since been found in two other places within Cornwall. It was published as new to science in 1976. Distribution, habitat and conservation In 1963, a local bryologist Jean Paton, found an unknown specimen at a roadside to the west of Lanner, near Redruth, in west Cornwall. It was on mine spoil used to surface a small roadside lay-by. It has not been re-found at Lanner but two years later, in 1965 she found the same species at a disused copper mine on the south-east edge of Bodmin Moor at Minions. In 1997 David Holyoak found another population nearby at Crow's Nest. A small population discovered in west Cork, Ireland is likely to have been an accidental introduction from Cornwall and appears to have disappeared. The entire world population of this species covers only 0.16msq and it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asplenium Septentrionale
''Asplenium septentrionale'' is a species of fern known by the common names northern spleenwort and forked spleenwort. It is native to Europe, Asia and western North America, where it grows on rocks. Its long, slender leaves give it a distinctive appearance. Three subspecies exist, corresponding to a tetraploid and a diploid cytotype and their triploid hybrid. Description ''Asplenium septentrionale'' is a small fern which grows in dense clusters superficially resembling tufts of grass. The long, dark stems support narrow, leathery leaf blades, which may appear slightly forked at the tip. The fronds are monomorphic, with no difference in shape or size between fertile and sterile fronds. The rhizome from which the many leaves of each plant spring is about 1 millimetre in diameter, and covered with scales. The scales are narrowly triangular, and range in color from black to a dark reddish brown. They are long, 0.3 to 0.6 millimetres wide, and entire (untoothed) at the ed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epipactis Youngiana
''Epipactis helleborine'' var. ''youngiana'', known as Young's helleborine, is a variety of orchid that is endemic to Great Britain. It has also been treated as a separate species, ''Epipactis youngiana''. Taxonomy ''Epipactis helleborine'' var. ''youngiana'' was discovered in 1975 by Tony Porter, and described as a new species by Porter and A. J. Richards in 1982. The specific epithet commemorates Donald Peter Young, who worked extensively on ''Epipactis''. It is part of the ''Epipactis helleborine'' species complex, and cannot be distinguished from the wide-ranging and variable species ''E. helleborine'' using genetic markers. It is therefore treated as a variety of the widespread species, as ''E. helleborine'' var. ''youngiana''. ''Epipactis helleborine'' var. ''youngiana'' was thought to be a hybrid between two other orchid taxa, probably '' E. dunensis'' and ''E. helleborine''. More recently it is treated simply as a variety of ''E. helleborine''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
