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Crataegus Laevigata
''Crataegus laevigata'', known as the Midland hawthorn, English hawthorn, woodland hawthorn, or mayflower, is a species of hawthorn native to western and central Europe, from Great Britain (where it is typically found in ancient woodland and old hedgerows) and Spain east to the Czech Republic and Hungary. It is also present in North Africa. The species name is sometimes spelt ''C. levigata'', but the original orthography is ''C. lævigata''. Description It is a large shrub or small tree growing to or rarely to tall, with a dense crown. The leaves are long and broad, with two or three shallow, forward-pointing lobes on each side of the leaf. The hermaphrodite flowers are produced in corymbs of 6 to 12, each flower with five white or pale pink petals and two or sometimes three styles. The flowers are pollinated by insects. The fruit is a dark red pome diameter, slightly broader than long, containing two or three nutlets. It is distinguished from the closely related common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crataegus × Media
''Crataegus'' × ''media'', is a hybrid between two species in the genus '' Crataegus'' (Hawthorn), '' C. monogyna'' and '' C. laevigata'', both in series '' Crataegus''. Under the rules of botanical nomenclature the name ''C.'' × ''media'' covers all intermediate forms between the two parent species, including backcrosses. Horticulturally significant forms of ''C.'' × ''media'' include some with double pink or red flowers, including 'Paul's scarlet' and 'Rubra Plena'. References media Media may refer to: Communication * Media (communication), tools used to deliver information or data ** Advertising media, various media, content, buying and placement for advertising ** Broadcast media, communications delivered over mass e ... Hybrid plants {{Crataegus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Louis Marie Poiret
Jean Louis Marie Poiret (11 June 1755 in Saint-Quentin7 April 1834 in Paris) was a French clergyman, botanist, and explorer. From 1785 to 1786, he was sent by Louis XVI to Algeria to study the flora. After the French Revolution, he became a professor of natural history at the Écoles Centrale of Aisne. The genus '' Poiretia'' of the legume family Fabaceae was named after him in 1807 by Étienne Pierre Ventenat. Selected publications *Coquilles fluviatiles et terrestres observées dans le département de l'Aisne et aux environs de Paris. Prodrome. – pp. i–xi –11 1–119. Paris. (Barrois, Soissons); (1801). * ''Leçons de flore: Cours complet de botanique'' (1819–1820); (illus. by P. J. F. Turpin). * * * * * ''Voyage en Barbarie, …, pendant les années 1785 et 1786'' (1789). * ''Histoire philosophique, littéraire, économique des plantes d'Europe''; (1825–1829). * with Jean-Baptiste de Lamarck Jean-Baptiste Pierre Antoine de Monet, chevalier de La ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrena
A pyrena or pyrene (commonly called a "pit" or "stone") is the fruitstone within a drupe or drupelet produced by the ossification of the endocarp or lining of the fruit. It consists of a hard endocarp tissue surrounding one or more seeds (also called the "kernel"). The hardened endocarp which constitutes the pyrene provides a protective physical barrier around the seed, shielding it from pathogens and herbivory. While many drupes are monopyrenous, containing only one pyrene, pome-type fruit with a hard, stony (rather than leathery) endocarp are typically polypyrenous drupes, containing multiple pyrenes. Development The hardening of the endocarp of a developing drupe occurs via secondary cell wall formation and lignification. The biopolymer lignin, also found in wood, provides a structure within secondary cell walls which supports the polymerisation of cellulose and hemicellulose; together these polymers provide the endocarp with tensile strength and stiffness. Further harden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasineura Crataegi
''Dasineura crataegi'', the hawthorn button-top gall-midge, is a dipteran gall-midge. It causes the hawthorn button-top gall, which develops in the terminal shoots of common hawthorn, ''Crataegus monogyna'' Jacq., Midland hawthorn '' C laevigata'' (Poir.) DC and their hybrid, '' C × media'' Bechst.Stubbs, Page 23Redfern, Page 315 Synonyms are ''Perrisia crataegi'' and ''Cecidomyia crataegi'' (Winnertz, 1853).Darlington, Page 137 Appearance of the gall The midge induces stunted and distorted rosettesHancy, Page 88 in the host by inhibiting the elongation of the shoot; the rosette is formed from many (8 to 40 or more) slightly thickened and deformed leaves with reduced petioles. Many of the leaves have small green or red ligulate excrescences or projections. The midge larvae are of an orange-red colour.Redfern, Page 315 The gall is occasionally found on isolated plants, but infestation is more commonly in hedges, with the new growth resulting from hedge cutting being the site o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Award Of Garden Merit
The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit is a mark of quality awarded, since 1922, to garden plants (including trees, vegetables and decorative plants) by the United Kingdom, Royal Horticultural Society (RHS). Awards are made annually after plant trials intended to judge the plants' performance under UK growing conditions. Trials may last for one or more years, depending on the type of plant being analyzed, and may be performed at Royal Horticulture Society Garden in Wisley and other gardens or after observation of plants in specialist collections. Trial reports are made available as booklets and on the website. Awards are reviewed annually in case plants have become unavailable horticulturally, or have been superseded by better cultivars. Similar awards The award should not be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Horticultural Society
The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (North Yorkshire), Rosemoor (Devon) and Bridgewater (Greater Manchester); flower shows including the Chelsea Flower Show, Hampton Court Palace Flower Show, Tatton Park Flower Show and Cardiff Flower Show; community gardening schemes; Britain in Bloom and a vast educational programme. It also supports training for professional and amateur gardeners. the president was Keith Weed and the director general was Sue Biggs CBE. History Founders The creation of a British horticultural society was suggested by John Wedgwood (son of Josiah Wedgwood) in 1800. His aims were fairly modest: he wanted to hold regular meetings, allowing the society's members the opportunity to present papers on their horticultural activities and discoveries, to enc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Botanical Congress
International Botanical Congress (IBC) is an international meeting of botanists in all scientific fields, authorized by the International Association of Botanical and Mycological Societies (IABMS) and held every six years, with the location rotating between different continents. The current numbering system for the congresses starts from the year 1900; the XVIII IBC was held in Melbourne, Australia, 24–30 July 2011, and the XIX IBC was held in Shenzhen, China, 23–29 July 2017. The IBC has the power to alter the ICN ( International Code of Nomenclature for algae, fungi, and plants), which was renamed from the International Code of Botanical Nomenclature (ICBN) at the XVIII IBC. Formally the power resides with the Plenary Session; in practice this approves the decisions of the Nomenclature Section. The Nomenclature Section meets before the actual Congress and deals with all proposals to modify the Code: this includes ratifying recommendations from sub-committees on conservation. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Irene Byatt
Jean may refer to: People * Jean (female given name) * Jean (male given name) * Jean (surname) Fictional characters * Jean Grey, a Marvel Comics character * Jean Valjean, fictional character in novel ''Les Misérables'' and its adaptations * Jean Pierre Polnareff, a fictional character from ''JoJo's Bizarre Adventure'' Places * Jean, Nevada, USA; a town * Jean, Oregon Jean is an unincorporated community in Clackamas County, Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washingt ..., USA Entertainment * Jean (dog), a female collie in silent films * "Jean" (song) (1969), by Rod McKuen, also recorded by Oliver * ''Jean Seberg'' (musical), a 1983 musical by Marvin Hamlisch Other uses * JEAN (programming language) * USS ''Jean'' (ID-1308), American cargo ship c. 1918 * Sternwheeler Jean, a 1938 paddleboat of the Willamette River See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Edgar Dandy
James Edgar Dandy (24 September 1903, in Preston, Lancashire – 10 November 1976, in Tring) was a British botanist, Keeper of Botany at the British Museum (Natural History) between 1956 and 1966. He was a world specialist on the plant genus ''Potamogeton'' and the family Magnoliaceae. Life Dandy was educated at Winckley Square#Preston Grammar School, Preston Grammar School and after that at Downing College, Cambridge, where he took his B.A. In 1925, he was appointed as an assistant to John Hutchinson (botanist), John Hutchinson at Kew Gardens, who worked on a new Angiosperm classification. He gave Dandy the opportunity to revise three taxa, one of which was Magnoliaceae. He became Fellow of the Linnean Society in 1927. On 11 July the same year, he was appointed Second class Assistant at the British Museum Department of Botany. He stayed here until his retirement in 1966. In 1936 he was promoted to First class Assistant, in 1946 to Principal Scientific Officer, and in 1956 he even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicholaas Jacquin
Nikolaus Joseph Freiherr von Jacquin (16 February 172726 October 1817) was a scientist who studied medicine, chemistry and botany. Biography Born in Leiden in the Netherlands, he studied medicine at Leiden University, then moved first to Paris and afterward to Vienna. In 1752, he studied under Gerard van Swieten in Vienna. Between 1755 and 1759, Jacquin was sent to the West Indies, Central America, Venezuela and New Granada by Francis I to collect plants for the Schönbrunn Palace, and amassed a large collection of animal, plant and mineral samples. In 1797, Alexander von Humboldt profited from studying these collections and conversing with Jacquin in preparation of his own journey to the Americas. In 1763, Jacquin became professor of chemistry and mineralogy at the Bergakademie Schemnitz (now Banská Štiavnica in Slovakia). In 1768, he was appointed Professor of Botany and Chemistry and became director of the botanical gardens of the University of Vienna. For his work, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Linnaeus
Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as and, after his 1761 ennoblement, as . Linnaeus was born in Råshult, the countryside of Småland, in southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his ' in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crataegus Oxyacantha
The name ''Crataegus oxyacantha'' L. has been rejected as being of uncertain application, but is sometimes still used. Taxonomy Linnaeus introduced the name ''Crataegus oxyacantha'' for a species of Northern European hawthorn and the name gradually became used for several similar species, which were assumed to be the same, particularly the Midland hawthorn '' C. laevigata'' and the common hawthorn '' C. monogyna''. In 1946, Dandy showed that Linnaeus had actually observed and described a single-styled species similar to the common hawthorn, and the Midland hawthorn was effectively a later discovery. However, Byatt showed that confusion over the true identity of ''C. oxyacantha'' remained, and the name was formally rejected as ambiguous by the International Botanical Congress.. More recently, Christensen concluded that the species studied by Linnaeus matches '' C. rhipidophylla'' Gand. Abbé Jean Michel Gandoger (10 May 1850 – 4 October 1926), was a French botanist and mycologis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
