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Ulmus Minor 'Viminalis Gracilis'
The Field Elm cultivar ''Ulmus minor'' 'Viminalis Gracilis' 'slender'is a form of ''U. minor'' 'Viminalis'. Cultivars listed as ''Ulmus gracilis'' Hort. by Kirchner (1864), and as ''U. scabra viminalis gracilis'' Hort. by Dieck (1885), were considered by Green to be forms of Melville's ''U.'' × ''viminalis''. A 1929 herbarium specimen held at the Hortus Botanicus Leiden is labelled ''U. campestris'' var. ''viminalis'' f. ''gracilis'', implying a cultivar that differed from the 'type' tree. Sheet labelled ''U. viminalis gracilis'' (Leiden specimen) Description The epithet 'gracilis' usually refers to the slender habit of a cultivar. Dippel (1892), who treated the 'Viminalis' group as a form of ''U. montana'' (sometimes used for hybrids in his day), described ''viminalis'' f. ''gracilis'' as a small to medium-sized tree, with even finer, more hanging branches than type- 'Viminalis', and smaller, narrower, almost slit-edged leaves. Sheet labelled ''U. campestris'' var. ''vimi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Minor
''Ulmus minor'' Mill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention. Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern outposts are the Baltic islands of Öland and Gotland, although it may have been introduced by humans. The tree's typical habitat is low-lying forest along the main rivers, growing in association with oak and ash, where it tolerates summer floods as well as droughts.Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). ''Iep of olm, karakterboom van de Lage Landen'' (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij. Current treatment of the species owes much to Richens, who noted (1983) that several varieties of field elm are distinguishable on the European mainland. Of these, he listed the small-leaved ''U. minor'' of France and Spain; the narrow-leaved ''U. minor'' of northern and central Italy; the densely hairy lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cultivar
A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, or carefully controlled seed production. Most cultivars arise from purposeful human manipulation, but some originate from wild plants that have distinctive characteristics. Cultivar names are chosen according to rules of the International Code of Nomenclature for Cultivated Plants (ICNCP), and not all cultivated plants qualify as cultivars. Horticulturists generally believe the word ''cultivar''''Cultivar'' () has two meanings, as explained in '' Formal definition'': it is a classification category and a taxonomic unit within the category. When referring to a taxon, the word does not apply to an individual plant but to all plants that share the unique characteristics that define the cultivar. was coined as a term meaning "cultivated vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Minor 'Viminalis'
The field elm cultivar ''Ulmus minor'' 'Viminalis' (:'willow-like'), occasionally referred to as the twiggy field elm, was raised by Masters in 1817, and listed in 1831 as ''U. campestris viminalis'', without description. Loudon added a general description in 1838, and the Cambridge University Herbarium acquired a leaf specimen of the tree in 1866. Moss, writing in 1912, said that the ''Ulmus campestris viminalis'' from Cambridge University Herbarium was the only elm he thought agreed with the original Plot's elm (not ''U. minor'' 'Plotii') as illustrated by Dr. Plot in 1677 from specimens growing in an avenue and coppice at Hanwell near Banbury. Elwes and Henry (1913) also considered Loudon's ''Ulmus campestris viminalis'' to be Dr Plot's elm. Its 19th-century name, ''U. campestris'' var. ''viminalis'', led the cultivar to be classified for a time as a variety of English Elm. On the Continent, 'Viminalis' was the ''Ulmus antarctica'' Hort., 'zierliche Ulme' 'dainty elm'of Ki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Dieck
Georg Dieck (28 April 1847 in Zöschen – 21 October 1925 in Zöschen) was a German entomologist and botanist. After attending high school in Naumburg, he studied natural sciences at Jena, where he was a pupil and assistant of Ernst Haeckel. In 1870, he taught in Zöschen at the large arboretum, where over 6000 different tree and shrub species were cultivated. In addition to the maintenance of plant collections, Dieck went on expeditions in the Rockies (1888), in the Caucasus (1891) and Spain (1892), where he collected beetles, plants and mosses, while new taxa such as ''Orthotrichum cupulatum'' var ''baldaccii'' were discovered. Further journeys led him to France, Italy and Sicily, Morocco, the Balkans and Turkey. He wrote many scientific papers describing new taxa, and introduced several plants to western cultivation, notably ''Ulmus pumila'' L. var. ''arborea'' Litv. from Turkestan. His collections are in the University of Halle-Wittenberg (Biozentrum, World Coleoptera), Mus� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Shaw Green
Peter Shaw Green (11 September 1920–17 August 2009) was an English botanist. Early life Green was born in Rochester, Kent, the youngest son of John and Elizabeth (née Hainsworth) Green, his father a civilian engineer with the Royal Air Force. He was educated at Taunton School, before studying botany at King's College London. His studies were interrupted by the Second World War, in which he served as an Adjutant (Captain) in the Northumberland Fusiliers, initially training recruits to shoot, but later joining his regiment in Italy, where he contracted typhoid. Upon recovery, he was despatched to Greece. In 1946, while still in uniform, he married Winifred Brown, whom he had met at King's College before the war. After demobilization, he returned to his studies at King's College. Career After graduation, Green was appointed Assistant Lecturer at Birmingham University before joining the Royal Botanic Garden, Edinburgh in 1952. In 1961, he moved to the Arnold Arboretum of Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronald Melville (botanist)
Ronald Melville (12 March 1903 – 6 August 1985) He was an English botanist, based at the Royal Botanic Gardens Kew. He is chiefly remembered for his wartime research into Rose hip, rosehips as a source of vitamin C, prompted by the epidemic of scurvy amongst children owing to the reduced importation of fresh fruit. His research concluded that hips from the common Dog Rose ''Rosa canina'' held the highest concentration of the vitamin. In later years, he challenged the two-species taxonomy of the British elms proposed by Richard Hook Richens, Richens,Richens, R. H. (1984) ''Elm'', Cambridge University Press. identifying five distinct species, several varieties and numerous complex hybrids.Melville, R. (1978). On the discrimination of species in hybrid swarms with special reference to ''Ulmus'' and the nomenclature of ''U. minor'' (Mill.) and ''U. carpinifolia'' (Gled.). ''Taxon'' 27: 345-351, 1978. Melville assembled a large collection of elm species, varieties and hybrids whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnold Arboretum
The Arnold Arboretum of Harvard University is a botanical research institution and free public park, located in the Jamaica Plain and Roslindale neighborhoods of Boston, Massachusetts. Established in 1872, it is the oldest public arboretum in North America. The landscape was designed by Charles Sprague Sargent and Frederick Law Olmsted and is the second largest "link" in the Emerald Necklace. The Arnold Arboretum's collection of temperate trees, shrubs, and vines has a particular emphasis on the plants of the eastern United States and eastern Asia, where arboretum staff and colleagues are actively sourcing new material on plant collecting expeditions. The arboretum supports research in its landscape and in its Weld Hill Research Building. History The Arboretum was founded in 1872 when the President and Fellows of Harvard College became trustees of a portion of the estate of James Arnold (1781–1868), a whaling merchant from New Bedford, Massachusetts. Arnold specified tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University
Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher learning in the United States and one of the most prestigious and highly ranked universities in the world. The university is composed of ten academic faculties plus Harvard Radcliffe Institute. The Faculty of Arts and Sciences offers study in a wide range of undergraduate and graduate academic disciplines, and other faculties offer only graduate degrees, including professional degrees. Harvard has three main campuses: the Cambridge campus centered on Harvard Yard; an adjoining campus immediately across Charles River in the Allston neighborhood of Boston; and the medical campus in Boston's Longwood Medical Area. Harvard's endowment is valued at $50.9 billion, making it the wealthiest academic institution in the world. Endo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hortus Botanicus Leiden
The Hortus botanicus of Leiden is the oldest botanical garden of the Netherlands, and one of the oldest in the world. It is located in the southwestern part of the historical centre of the city, between the Academy building and the old Leiden Observatory building. History In 1587 the young University of Leiden asked for permission from the mayor of Leiden to establish a ''hortus academicus'' behind the university building, for the benefit of the medical students. The request was granted in 1590, and the famous botanist Carolus Clusius (1526–1609) was appointed as prefect. Clusius arrived in Leiden in 1593. His knowledge, reputation, and international contacts allowed him to set up a very extensive plant collection. Clusius also urged the Dutch East India Company (VOC) to collect plants and (dried) plant specimens in the colonies. The original garden set up by Clusius was small (about 35 by 40 meters), but contained more than 1000 different plants. The collecting o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leopold Dippel
Georg Heinrich Leopold Dippel (4 August 1827 – 4 March 1914) was a German botanist. He was the son of a royal Bavarian forester, Carl Friedrich Peter Dippel, and Sussanna Purpus. He attended schools in Kaiserslautern and Zweibrücken. From 1845, he studied at the Academy of Forestry in Aschaffenburg, until he graduated in 1848. During his time there he was a member of the Munich Corps Hubertia fraternity. He continued his studies in Jena under the tutelage of Matthias Jacob Schleiden. Under him, he learned more extensively about botany and pioneered his work in microscopy and his research on the structure of plant's bodies. From July 1869, he worked at the Technische Universität Darmstadt The Technische Universität Darmstadt (official English name Technical University of Darmstadt, sometimes also referred to as Darmstadt University of Technology), commonly known as TU Darmstadt, is a research university in the city of Darmstadt ..., as a Professor of Botany and Zoology, Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Rehder
Alfred Rehder (4 September 1863 in Waldenburg, Saxony – 25 July 1949 in Jamaica Plain, Massachusetts) was a German-American botanical taxonomist and dendrologist who worked at the Arnold Arboretum of Harvard University. He is generally regarded as the foremost dendrologist of his generation. Life Georg Alfred Rehder was born in the castle of Waldenburg to Thekla née Schmidt (1839–1897) and Paul Julius Rehder (1833–1917), the superintendent of parks and gardens of the principality of Schönburg-Waldenburg. Through his father, Rehder was introduced to the gardening profession. On his mother's side of the family, Rehder was likely descended from Henry, Duke of Anhalt-Köthen (1778–1847). Rehder broke off his attendance at the gymnasium in Zwickau in 1881 and did not pursue university studies, instead working for three years as an apprentice under the tutelage of his father. His professional career began in 1884 at the Berlin Botanical Garden. Here he was able ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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