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Wild Service Tree
''Torminalis'' is a genus of plants in the rose family, Rosaceae. The genus was formerly included within the genus ''Sorbus'' as the section ''Torminaria'', but the simple-leafed species traditionally classified in ''Sorbus'' are now considered to form a separate monophyletic group. It is monotypic, being represented by the single species ''Torminalis glaberrima'', commonly known as wild service tree, chequers, and checker tree. This tree is native to Europe, parts of northern Africa and western Asia. A possible second species in the genus has been identified through DNA analysis, but a new scientific description for it has not yet been written. Description ''Torminalis glaberrima'' is a medium-sized deciduous tree growing to about 30 m (100 ft) tall, with a trunk up to 1.3 m in diameter. The bark is smooth and grey when young, becoming scaly and flaking away in squarish plates to reveal darker brown layers when about 30 years old. Young twigs are lightly hairy, quickly becomin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Kasimir Medikus
Friedrich Kasimir Medikus (or Friedrich Casimir Medicus; 6 January 1738 – 8 July 1808) was a German physician and botanist. He was born at Grumbach and became director of the University of Mannheim (Theodoro Palatinae Mannheim) and curator of the botanical garden at Mannheim. He encouraged the cultivation of locust trees (''Robinia'') in Europe. The genus ''Medicusia'' was named after him by Conrad Moench Conrad Moench (sometimes written Konrad Mönch; 15 August 1744 – 6 January 1805) was a German botanist, professor of botany at Marburg University from 1786 until his death. He wrote ''Methodus Plantas horti botanici et agri Marburgensis''; in ... (now considered synonymous with '' Picris''). References {{DEFAULTSORT:Medikus, Friedrich Kasimir 18th-century German botanists 1738 births 1808 deaths People from Kusel (district) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sorbus Torminalis Leaves Kz
''Sorbus'' is a genus of over 100 species of trees and shrubs in the rose family, Rosaceae. Species of ''Sorbus'' ('' s.str.'') are commonly known as rowan or mountain-ash. The genus used to include species commonly known as whitebeam, chequer tree and service tree that are now classified in other genera (see below). The genus ''Sorbus'', as currently circumscribed, includes only the pinnate leaved species of former subgenus ''Sorbus''. ''Sorbus'' is not closely related to the true ash trees which belong to the genus ''Fraxinus'', although the leaves are superficially similar. Genus As treated in its broad sense, the genus was traditionally divided into several subgenera, however, this treatment was found to be paraphyletic, comprising two disparate lineages within the Malinae subtribe. Consequently, each of the former subgenera have since been elevated into genera in their own right, with the genus name ''Sorbus'' retained only for the rowans. Additionally, it was recognised th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karpatiosorbus
''Karpatiosorbus'' (Synonymy: ''Sorbus'' subgenus ''Tormaria'' Májovsky & Bernátová = ''S''. subgenus ''Aria'' x subgenus ''Torminaria'') is a genus of flowering plants in the family Rosaceae, native to Europe, including Crimea, and Algeria. Shrubs or small trees, they appear to have arisen via hybridization events between the clades ''Aria'' (Pers.) Host and '' Torminalis'' Medik. Many of its species propagate solely by apomixis In botany, apomixis is asexual development of seed or embryo without fertilization. However, other definitions include replacement of the seed by a plantlet or replacement of the flower by bulbils. Apomictically produced offspring are geneti .... The genus name of ''Karpatiosorbus'' is in honour of Zoltán Kárpáti (1909–1972), who was a Hungarian (Geo-)Botanist, Taxonomist, Dendrologist and specialist in Sorbus (from central Europe). The genus was circumscribed by Alexander Nikolaevitsch Sennikov and Arto Kurtto in Memoranda Soc. Fauna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karpatiosorbus Bristoliensis
''Karpatiosorbus bristoliensis'' is a species of flowering plant in the family Rosaceae. It is known commonly as the Bristol whitebeam. It is endemic to Great Britain, growing wild only in the Avon Gorge and in the Leigh Woods area of Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t .... There are around 300 individuals as of 2016, and the population is thought to be increasing. References Further reading *Watkins, JWhitebeams spread their leaves in Bristol's Avon Gorge.''The Telegraph'' 14 May 2009. {{Taxonbar, from1=Q41521683, from2=Q2249201 Endemic flora of England bristoliensis Endangered plants Taxonomy articles created by Polbot Plants described in 1934 Environment of Bristol Taxobox binomials not recognized by IUCN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sorbus Latifolia
''Karpatiosorbus latifolia'' (the broad-leaved whitebeam or service tree of Fontainebleau; French: ''alisier de Fontainebleau'') is a species of whitebeam that is endemic to the area around Fontainebleau, south of Paris in France, where it has been known since the early eighteenth century.Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins .Mitchell, A. F. (1974). ''A Field Guide to the Trees of Britain and Northern Europe''. Collins Mitchell, A. F. (1982). ''The Trees of Britain and Northern Europe''. Collins Description It is a medium-sized deciduous tree that grows to between ten and twenty metres tall, with a trunk up to sixty centimetres in diameter. The leaves are five to ten centimetres long and broad (rarely, up to 20 cm long and 12 cm broad), but, most typically, the leaves are approximately as broad as they are long. (''Latifolia'' is the Latin word for 'broad-leaved'.) They are green above, downy with greyish-white hairs beneath, with six to ten s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction. Generally, it means that each cell has genetic material from two different organisms, whereas an individual where some cells are derived from a different organism is called a chimera. Hybrids are not always intermediates between their parents such as in blending inheritance (a now discredited theory in modern genetics by particulate inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridization, which include genetic and morph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apomixis
In botany, apomixis is asexual development of seed or embryo without fertilization. However, other definitions include replacement of the seed by a plantlet or replacement of the flower by bulbils. Apomictically produced offspring are genetically identical to the parent plant, except in nonrecurrent apomixis. Its etymology is Greek for "away from" + "mixing". Normal asexual reproduction of plants, such as propagation from cuttings or leaves, has never been considered to be apomixis. In contrast to parthenocarpy, which involves seedless fruit formation without fertilization, apomictic fruits have viable seeds containing a proper embryo, with asexual origin. In flowering plants, the term "apomixis" is used in a restricted sense to mean agamospermy, i.e. clonal reproduction through seeds. Although agamospermy could theoretically occur in gymnosperms, it appears to be absent in that group. Apogamy is a related term that has had various meanings over time. In plants with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitebeam
The whitebeams are members of the family Rosaceae, tribe Malinae, comprising a number of deciduous simple or lobe-leaved species formerly lumped together within ''Sorbus'' s.l. Many whitebeams are the result of extensive intergeneric hybridisation involving the genera ''Sorbus'' (''Sorbus aucuparia'' in particular), ''Aria'', '' Torminalis'' and ''Chamaemespilus''. As an effect, they are commonly apomicts (reproducing solely asexually) and many have very restricted ranges. The best known species is the common whitebeam ('' Aria edulis''), 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 In many species, the surface of the leaves is an unremarkable mid-green, but the underside is pale to almost white (hence the name) with pale grey or white hairs, transforming the appearance of the tree in strong winds, as noted by the poet Meredith: "flashing as in gusts the sudden-lighted wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aria (plant)
''Aria'' is a genus of plant in the rose family Rosaceae. It includes some of the deciduous species commonly known as whitebeams, and is native to Europe, the north African mountains and western Asia. Via hybridisation with related genera, it is a main contributor to the genesis of a complex of apomicts of intergeneric hybrid origin, which are also commonly referred to as whitebeams. Description Whitebeams of the genus ''Aria'' are small to medium-sized bushes or trees. The leaves are simple and almost white on the underside. The leaf margins are often serrated. While some species such as common whitebeam ('' Aria edulis'') may grow into sizeable trees of up to height, many species (such as rock whitebeam, '' Aria rupicola'') stay bushy. They bear corymbs of white flowers in spring, and the small, colourful pome fruits ripen in late summer. Whitebeam apomicts Hybridisation events between at least one member of genus ''Aria'' and at least one member of at least one differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Here ''sets of chromosomes'' refers to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair—the form in which chromosomes naturally exist. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more sets of chromosomes. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variety (botany)
In botanical nomenclature, variety (abbreviated var.; in ) is a taxonomic rank below that of species and subspecies, but above that of form. As such, it gets a three-part infraspecific name. It is sometimes recommended that the subspecies rank should be used to recognize geographic distinctiveness, whereas the variety rank is appropriate if the taxon is seen throughout the geographic range of the species. Example The pincushion cactus, ''Escobaria vivipara'', is a wide-ranging variable species occurring from Canada to Mexico, and found throughout New Mexico below about . Nine varieties have been described. Where the varieties of the pincushion cactus meet, they intergrade. The variety ''Escobaria vivipara'' var. ''arizonica'' is from Arizona, while ''Escobaria vivipara'' var. ''neo-mexicana'' is from New Mexico. Definitions The term is defined in different ways by different authors. However, the International Code of Nomenclature for Cultivated Plants, while recognizing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaspard Bauhin
Gaspard Bauhin or Caspar Bauhin (; 17 January 1560 – 5 December 1624), was a Switzerland, Swiss botanist whose ''Pinax theatri botanici'' (1623) described thousands of plants and classified them in a manner that draws comparisons to the later binomial nomenclature of Carl Linnaeus, Linnaeus. He was a disciple of the famous Italian physician Girolamo Mercuriale and he also worked on human anatomy, anatomical nomenclature. Bauhin described the ileocecal valve in 1588—hence the name Bauhin's Valve or Valve of Bauhin—in the preface of his first writing,''De corporis humani partibus externis tractatus, hactenus non editus.''Linnaeus honored the Bauhin brothers Gaspard and Johann Bauhin, Jean in the genus name ''Bauhinia''. Biography Jean and Gaspard were the sons of Jean Bauhin (1511–1582), a French physician who had to leave his native country on becoming a convert to Protestantism. Gaspard was born in Basel. From 1572 he studied in his hometown, Padua, Bologna, Montpelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
