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Hedlundia Anglica
''Hedlundia anglica'', the English whitebeam, is a species of whitebeam tree in the family Rosaceae. It is endemic to Ireland and the United Kingdom, with an entire British population estimated at 600David Jones, ''Welsh Wildlife'', 2003, "Trees", p. 39. individuals. Description ''Hedlundia anglica'' grows as a small tree or shrub, often with multiple stems. The leaves are broader than most other related species, with lobes whose bases are incised up to one third of the way to the midrib. Distribution ''Hedlundia anglica'' is found in several widely scattered sites in southwestern England, Wales, and around Killarney in southwestern Ireland. Ecology and evolution ''Hedlundia anglica'' is usually found growing on cliffs, quarries and rocky hillsides. It appears to be indifferent to soil pH. Occasional specimens are known from oak woodland. Research suggests ''Hedlundia anglica'' arose from a cross between '' Aria porrigentiformis'' and ''Sorbus aucuparia ''Sorbus aucuparia' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Biodiversity Network
The National Biodiversity Network (UK) (NBN) is a collaborative venture set up in 2000 in the United Kingdom committed to making biodiversity information available through various media, including on the internet via the NBN Atlas—the data search website of the NBN. Description It is estimated that up to 60,000 people routinely record biodiversity information in the UK and Ireland. Most of this effort is voluntary and is organised through about 2,000 national societies and recording schemes. The UK government through its agencies also collects biodiversity data and one of the principal elements for the collation and interpretation of this data is the network of Local Environmental Records Centres. In 2012, it had been listed in the top 1,000 UK charities that raised most donations. NBN Trust The NBN Trust—the organisation facilitating the building of the Network—supports agreed standards for the collection, collation and exchange of biodiversity data and encourages improve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint Nature Conservation Committee
The Joint Nature Conservation Committee (JNCC) is the public body that advises the UK Government and devolved administrations on UK-wide and international nature conservation. Originally established under the Environmental Protection Act 1990, JNCC was reconstituted by the Natural Environment and Rural Communities Act 2006. JNCC is led by the Joint Committee, which brings together members from the nature conservation bodies for England, Scotland, Wales and Northern Ireland and independent members appointed by the Secretary of State for the Environment, Food and Rural Affairs under an independent chair. Support is provided to the committee by a company set up and controlled by the Committee solely for that purpose. The company employs around 130 people. They bring together scientific and technical expertise, extensive knowledge of policy at global, European and national levels and skills in working with other organisations. Staff are based in offices in Peterborough and Aberdeen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitebeam
The whitebeams are members of the family Rosaceae, comprising subgenus ''Aria'' (or, according to some authorities, its own genus) of genus ''Sorbus'', and hybrids involving species of this subgenus and members of subgenera ''Sorbus'', ''Torminaria'' and ''Chamaemespilus''. They are deciduous trees with simple or lobed leaves, arranged alternately. They are related to the rowans (''Sorbus'' subgenus ''Sorbus''), and many of the endemic restricted-range apomictic microspecies of whitebeam in Europe are thought to derive from hybrids between ''S. aria'' and the European rowan ''S. aucuparia''; some are also thought to be hybrids with the wild service tree ''S. torminalis'', notably the service tree of Fontainebleau ''Sorbus latifolia'' in French woodlands. The best known species is the common whitebeam ''Sorbus aria'', a columnar tree which grows to tall by broad, with clusters of white flowers in spring followed by speckled red berries in autumn (fall). Appearance The surface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosaceae
Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera. The name is derived from the type genus ''Rosa''. Among the most species-rich genera are '' Alchemilla'' (270), '' Sorbus'' (260), '' Crataegus'' (260), '' Cotoneaster'' (260), '' Rubus'' (250), and '' Prunus'' (200), which contains the plums, cherries, peaches, apricots, and almonds. However, all of these numbers should be seen as estimates—much taxonomic work remains. The family Rosaceae includes herbs, shrubs, and trees. Most species are deciduous, but some are evergreen. They have a worldwide range but are most diverse in the Northern Hemisphere. Many economically important products come from the Rosaceae, including various edible fruits, such as apples, pears, quinces, apricots, plums, cherries, peaches, raspberries, blackberries, loquats, strawberries, rose hips, hawthorns, and almonds. The family also includes popular ornamental trees and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil PH
Soil pH is a measure of the acidity or basicity (alkalinity) of a soil. Soil pH is a key characteristic that can be used to make informative analysis both qualitative and quantitatively regarding soil characteristics. pH is defined as the negative logarithm (base 10) of the activity of hydronium ions ( or, more precisely, ) in a solution. In soils, it is measured in a slurry of soil mixed with water (or a salt solution, such as ), and normally falls between 3 and 10, with 7 being neutral. Acid soils have a pH below 7 and alkaline soils have a pH above 7. Ultra-acidic soils (pH 9) are rare. Soil pH is considered a master variable in soils as it affects many chemical processes. It specifically affects plant nutrient availability by controlling the chemical forms of the different nutrients and influencing the chemical reactions they undergo. The optimum pH range for most plants is between 5.5 and 7.5; however, many plants have adapted to thrive at pH value ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aria Porrigentiformis
''Aria porrigentiformis'', commonly known as the grey-leafed whitebeam, is a species of whitebeam endemic to England and Wales. Description This species grows as a shrub or small tree, growing to a height of about 5m. It has obovate leaves ; these are shiny green above, and as with all whitebeams, are whitish below. Flowers are white, while the fruits are red globose berries ca.1cm across, usually dappled with pale lenticels.Rich, T.C.G., Houston, L., Robertson, A. and Proctor, M.C.F., 2010. Whitebeams, Rowans and Service trees of Britain and Ireland: a monograph of British and Irish 'Sorbus' L. London: Botanical Society of the British Isles. Distribution and habitat ''Aria porrigentiformis'' is a light demanding species, growing in abandoned quarries, scrubby hills, and grassland on shallow, usually calcareous soils. Populations are restricted to South Wales, Devon and Somerset, and there are fewer than one thousand individuals in total. References Rosaceae {{r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sorbus Aucuparia
''Sorbus aucuparia'', commonly called rowan (UK: /ˈrəʊən/, US: /ˈroʊən/) and mountain-ash, is a species of deciduous tree or shrub in the rose family. It is a highly variable species, and botanists have used different Circumscription (taxonomy), definitions of the species to include or exclude trees native to certain areas; a recent definition includes trees native to most of Europe and parts of Asia, as well as northern Africa. The range extends from Madeira, the British Isles and Iceland to Russia and northern China. Unlike many plants with similar distributions, it is not native to Japan. The tree has a slender trunk with smooth bark, a loose and roundish crown, and its leaves are pinnate in pairs of leaflets on a central vein with a terminal leaflet. It blossoms from May to June in dense corymbs of small yellowish white flowers and develops small red pomes as fruit that ripen from August to October and are eaten by many bird species. The plant is undemanding and frost h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hedlundia
''Hedlundia'' is a genus of plants in the rose family (biology), family (of Rosaceae). They are shrubs or small trees that have a Hybrid (biology), hybrid origin involving crosses between ''Whitebeam, Aria'' and ''Sorbus'' sensu stricto. There are about 48 species are distributed across central, western and southern Europe, Scandinavia, Turkey, the Caucasus, Crimea, and also central Asia. The term ''Hedlundia'' was published in 2017. Description ''Hedlundia'' species are small trees or shrubs, with simple leaves, pinnatilobate (having lobes arranged in a pinnate manner) or basally Pinnation, pinnate with 1–2(–3) leaflets. They are white- or greenish-grey-tomentose (covered with dense, matted, woolly hairs) beneath, with 7–15 pairs of lateral veins, with small to prominent, long, sub-acute to obtuse lobes with a variable number of teeth. They have flowers with white petals and 2–3 Gynoecium, styles. The fruit is medium-sized, orange-red to crimson in colour, with few to sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Articles Created By Polbot
Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. Among other things, a taxonomy can be used to organize and index knowledge (stored as documents, articles, videos, etc.), such as in the form of a library classification system, or a search engine taxonomy, so that users can more easily find the information they are searching for. Many taxonomies are hierarchies (and thus, have an intrinsic tree structure), but not all are. Originally, taxonomy referred only to the categorisation of organisms or a particular categorisation of organisms. In a wider, more general sense, it may refer to a categorisation of things or concepts, as well as to the principles underlying such a categorisation. Taxonomy organizes taxonomic units known as "taxa" (singular "taxon")." Taxonomy is different from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Great Britain
The flora of Great Britain and Ireland is one of the best documented in the world. There are 1390 native species and over 1100 well-established non-natives documented on the islands. A bibliographic database of the species is compiled by the Botanical Society of Britain and Ireland. Because of the size of the list, it is spread across multiple pages. * Part 1 covers ferns and allies (Lycopodiopsida, Equisetopsida and Pteridopsida) * Part 2 covers the conifers (Pinopsida) The remaining parts cover the flowering plants ( Magnoliopsida): * Part 3, covering a group of dicotyledon families (Lauraceae to Salicaceae) * Part 4, covering another group of dicotyledon families (Brassicaceae to Saxifragaceae) * Part 5, covering the dicotyledon family Rosaceae * Part 6, covering another group of dicotyledon families ( Mimosaceae to Dipsacaceae) * Part 7, covering the dicotyledon family Asteraceae * Part 8, covering the monocotyledons ( Butomaceae to Orchidaceae) The list gives an Engl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of Ireland
Many lists of trees of Great Britain and Ireland have been written. There are a number of issues surrounding the inclusion of a species in such a list. As can be seen from the outline of debate below, there is no 'correct' list of trees of Britain and Ireland. Issues of debate Definition of species There are a number of different opinions regarding the validity of some species, notably apomictic microspecies and whether some 'species' may actually be hybrids. In particular, the number and definition of species in the genera ''Sorbus'' (rowans, whitebeams etc.), ''Ulmus'' ( elms) and ''Salix'' ( willows) are open to debate. Definition of native Native species are considered to be species which are today present in the region in question, and have been continuously present in that region since a certain period of time. When applied to Britain and Ireland, three possible definitions of this time constraint are: * a species that colonised these islands during the retreat of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
