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Sheath Grass
''Coleanthus'' is a genus of Eurasian and North American plants in the grass family. The only known species is ''Coleanthus subtilis''. It has a scattered distribution, found on lakeshores, streambanks, and other wet places in central Europe (France, Germany, Czech Republic; extinct in Norway and Italy), Asia (Western Siberia, Khabarovsk, eastern China), and northwestern North America (Oregon, Washington, British Columbia). Description ''Coleanthus subtilis'' is a small-growing, clump-forming annual grass that often grows on the ground. The culms are thin, prostrate, or ascending, have two to three nodes, and a little groove. They grow to a length of 30 to 80 mm. The leaf sheaths are glabrous and closed in the lower half, especially the uppermost leaf sheath, which is strongly inflated. The ligules form a membranous fringe and scale between 0.5 and 0.8 mm. The glabrous leaf blades measure 10 to 20 mm in length and 1 to 2 mm in width. They are weakly groove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wenzel Benno Seidl
Wenzel Benno Seidl (sometimes spelt as Seidel; 14 September 1773 – 7 February 1842) was a Bohemian-Austrian botanist and entomologist. He examined the flora of Bohemia and also collected insect specimens from the region. The sedge genus ''Seidlia'' was named in his honour in 1826 by Philipp Maximilian Opiz but it is now a synonym of ''Scirpus''. Biography Seidl was born in Schüttenhofen and studied agriculture. He attended the lectures of Franz Willibald Schmidt in Prague and became interested in botany and began to examine the plants of the region. He became an accounts officer in the Imperial and Royal Provincial Accounting Office in Prague around 1809. He contributed to the ''Tentamen florae Bohemicae'' by Johann Ehrenfried Pohl. He wrote a manuscript on the wild plants of Bohemia titled ''Icones plantarum selectarum in Bohemia sponte nascentium'' with illustrations and hoped to produce a flora of Bohemia. It however remained unfinished. He also contributed to another work on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spikelet
A spikelet, in botany, describes the typical arrangement of the inflorescences of grasses, sedges and some other monocots. Each spikelet has one or more florets. The spikelets are further grouped into panicles or spikes. The part of the spikelet that bears the florets is called the rachilla. In grasses In Poaceae, the grass family, a spikelet consists of two (or sometimes fewer) bracts at the base, called glumes, followed by one or more florets. A floret consists of the flower surrounded by two bracts, one external (the lemma) and one internal (the palea). The perianth is reduced to two scales, called lodicules, that expand and contract to spread the lemma and palea; these are generally interpreted to be modified sepals. The flowers are usually hermaphroditic — maize being an important exception — and mainly anemophilous or wind-pollinated, although insects occasionally play a role. Lemma Lemma is a phytomorphological term referring to a part of the spikelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhineland-Palatinate
Rhineland-Palatinate ( , ; ; ; ) is a western state of Germany. It covers and has about 4.05 million residents. It is the ninth largest and sixth most populous of the sixteen states. Mainz is the capital and largest city. Other cities are Ludwigshafen am Rhein, Koblenz, Trier, Kaiserslautern, Worms, and Neuwied. It is bordered by North Rhine-Westphalia, Saarland, Baden-Württemberg and Hesse and by France, Luxembourg and Belgium. Rhineland-Palatinate was established in 1946 after World War II, from parts of the former states of Prussia (part of its Rhineland and Nassau provinces), Hesse ( Rhenish Hesse) and Bavaria (its former outlying Palatinate kreis or district), by the French military administration in Allied-occupied Germany. Rhineland-Palatinate became part of the Federal Republic of Germany in 1949 and shared the country's only border with the Saar Protectorate until the latter was returned to German control in 1957. Rhineland-Palatinate's natural and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westerwald
The Westerwald (; literally 'Western forest') is a low mountain range on the right bank of the river Rhine in the States of Germany, German federal states of Rhineland-Palatinate, Hesse and North Rhine-Westphalia. It is a part of the Rhenish Massif ( or Rhenish Slate Mountains). Its highest elevation, at 657 m above sea level, is the Fuchskaute in the High Westerwald. Tourist attractions include the (394 metres), site of some Celts, Celtic ruins from La Tène culture, La Tène times (5th to 1st century BC), found in the Dornburg, Hesse, community of the same name, and Limburg an der Lahn, a town with a Middle Ages, mediaeval centre. The Geology, geologically old, heavily Erosion, eroded range of the Westerwald is in its northern parts overlaid by a Volcano, volcanic upland made of Neogene basalt layers. It covers an area of some , and therefore roughly , making the Westerwald one of Germany's biggest mountain ranges by area. In areas of subsidence, it has in its flatter w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrocław
Wrocław is a city in southwestern Poland, and the capital of the Lower Silesian Voivodeship. It is the largest city and historical capital of the region of Silesia. It lies on the banks of the Oder River in the Silesian Lowlands of Central Europe, roughly from the Sudetes, Sudeten Mountains to the north. In 2023, the official population of Wrocław was 674,132, making it the third-largest city in Poland. The population of the Wrocław metropolitan area is around 1.25 million. Wrocław is the historical capital of Silesia and Lower Silesia. The history of the city dates back over 1,000 years; at various times, it has been part of the Kingdom of Poland, the Kingdom of Bohemia, the Kingdom of Hungary, the Habsburg monarchy of Austria, the Kingdom of Prussia and German Reich, Germany, until it became again part of Poland in 1945 immediately after World War II. Wrocław is a College town, university city with a student population of over 130,000, making it one of the most yo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waldviertel
The ''Waldviertel'' (; ; Central Bavarian: ; ) is the northwestern region of the Austrian state of Lower Austria. It is bounded to the south by the river Danube, to the southwest by Upper Austria, to the northwest and to the north by the Czech Republic and to the east by the Manhartsberg (), which is the survey point dividing the from the region. Geologically it is part of the Bohemian Massif. In the south are the Wachau and Kamptal wine regions. Districts The following administrative districts of Lower Austria are considered to be part of the * * * * * * northern part of * statutory city of Krems an der Donau Economy The northern Waldviertel (Forest Region) had been part of the Bohemian region of glasshouses since the 14th century. In historical times, Waldviertel sands were good raw materials for forest glass production, especially for colored glass. Further reading * Birgit Zotz Birgit Zotz (born 7 August 1979) is an Austrian writer, cultural anthropo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brittany
Brittany ( ) is a peninsula, historical country and cultural area in the north-west of modern France, covering the western part of what was known as Armorica in Roman Gaul. It became an Kingdom of Brittany, independent kingdom and then a Duchy of Brittany, duchy before being Union of Brittany and France, united with the Kingdom of France in 1532 as a provinces of France, province governed as a separate nation under the crown. Brittany is the traditional homeland of the Breton people and is one of the six Celtic nations, retaining Culture of Brittany, a distinct cultural identity that reflects History of Brittany, its history. Brittany has also been referred to as Little Britain (as opposed to Great Britain, with which it shares an etymology). It is bordered by the English Channel to the north, Normandy to the northeast, eastern Pays de la Loire to the southeast, the Bay of Biscay to the south, and the Celtic Sea and the Atlantic Ocean to the west. Its land area is 34,023 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a package of DNA containing part or all of the genetic material of an organism. In most chromosomes, the very long thin DNA fibers are coated with nucleosome-forming packaging proteins; in eukaryotic cells, the most important of these proteins are the histones. Aided by chaperone proteins, the histones bind to and condense the DNA molecule to maintain its integrity. These eukaryotic chromosomes display a complex three-dimensional structure that has a significant role in transcriptional regulation. Normally, chromosomes are visible under a light microscope only during the metaphase of cell division, where all chromosomes are aligned in the center of the cell in their condensed form. Before this stage occurs, each chromosome is duplicated ( S phase), and the two copies are joined by a centromere—resulting in either an X-shaped structure if the centromere is located equatorially, or a two-armed structure if the centromere is located distally; the jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ploidy
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 an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fruit
In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propagated using the movements of humans and other animals in a symbiotic relationship that is the means for seed dispersal for the one group and nutrition for the other; humans, and many other animals, have become dependent on fruits as a source of food. Consequently, fruits account for a substantial fraction of the world's agricultural output, and some (such as the apple and the pomegranate) have acquired extensive cultural and symbolic meanings. In common language and culinary usage, ''fruit'' normally means the seed-associated fleshy structures (or produce) of plants that typically are sweet (or sour) and edible in the raw state, such as apples, bananas, grapes, lemons, oranges, and strawberries. In botanical usage, the term ''fruit'' als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovary (botany)
In the flowering plants, an ovary is a part of the female reproductive organ of the flower or gynoecium. Specifically, it is the part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals. The pistil may be made up of one carpel or of several fused carpels (e.g. dicarpel or tricarpel), and therefore the ovary can contain part of one carpel or parts of several fused carpels. Above the ovary is the Style (botany), style and the stigma, which is where the pollen lands and germinates to grow down through the style to the ovary, and, for each individual pollen grain, to fertilize one individual ovule. Some wind pollinated flowers have much reduced and modified ovaries. Fruits A fruit is the mature, ripened ovary of a flower following double fertilization in an angiosperm. Because gymnosperms do not have an ovary but reproduce through fertilization of unprotected ovules, they produce naked seeds th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stigma (botany)
The stigma (: stigmas or stigmata) is the receptive tip of a Gynoecium#Carpels, carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the Style (botany), style and ovary (botany), ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germination, germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals (Pollination syndrome#Biotic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
