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Luronium Natans
''Luronium natans'' is a species of aquatic plant commonly known as the floating water-plantain. It is the only recognized species in the genus ''Luronium'', native to western and central Europe, from Spain to Britain to Norway east to Ukraine. Description Stems elongated, rising in the water or creeping and rooting at the nodes. Submerged leaves (if present) basal, linear; floating or aerial leaves elliptical to ovate. Flowers hermaphrodite, long-pedunculate in the axils of the floating or aerial leaves. Stamens 6. Carpels 6–15 in an irregular whorl, free, each with 1 ovule; styles apical. Fruitlets achenial, longitudinally many-ribbed, with a short apical beak. 2''n'' = 42. ''Luronium natans'' can be a difficult plant to identify. It is both very variable and resembles many other aquatic plants with strap-like leaves such as bur-reeds (''Sparganium''), young water-plantain plants (''Alisma''), arrowheads (''Sagittaria''), lesser water-plantain (''Baldellia'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constantine Samuel Rafinesque-Schmaltz
Constantine Samuel Rafinesque-Schmaltz (; October 22, 1783September 18, 1840) was a French 19th-century polymath born near Constantinople in the Ottoman Empire and self-educated in France. He traveled as a young man in the United States, ultimately settling in Ohio in 1815, where he made notable contributions to botany, zoology, and the study of Mound builder (people), prehistoric earthworks in North America. He also contributed to the study of ancient Mesoamerican languages, Mesoamerican linguistics, in addition to work he had already completed in Europe. Rafinesque was an eccentric and erratic genius. He was an autodidact, who excelled in various fields of knowledge, as a zoologist, botanist, writer and Polyglot (person), polyglot. He wrote prolifically on such diverse topics as anthropology, biology, geology, and linguistics, but was honored in none of these fields during his lifetime. Indeed, he was an outcast in the American scientific community whose submissions were reject ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luronium White Flecks
''Luronium natans'' is a species of aquatic plant commonly known as the floating water-plantain. It is the only recognized species in the genus ''Luronium'', native to western and central Europe, from Spain to Great Britain, Britain to Norway east to Ukraine. Description Stems elongated, rising in the water or creeping and rooting at the nodes. Submerged leaves (if present) basal, linear; floating or aerial leaves elliptical to ovate. Flowers hermaphrodite, long-pedunculate in the axils of the floating or aerial leaves. Stamens 6. Carpels 6–15 in an irregular whorl, free, each with 1 ovule; styles apical. Fruitlets achenial, longitudinally many-ribbed, with a short apical beak. 2''n'' = 42. ''Luronium natans'' can be a difficult plant to identify. It is both very variable and resembles many other aquatic plants with strap-like leaves such as bur-reeds (''Sparganium''), young water-plantain plants (''Alisma''), arrowheads (''Sagittaria''), lesser water-plantain (''B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Plants
Aquatic plants are plants that have adapted to living in aquatic environments (saltwater or freshwater). They are also referred to as hydrophytes or macrophytes to distinguish them from algae and other microphytes. A macrophyte is a plant that grows in or near water and is either emergent, submergent, or floating. In lakes and rivers macrophytes provide cover for fish, substrate for aquatic invertebrates, produce oxygen, and act as food for some fish and wildlife. Macrophytes are primary producers and are the basis of the food web for many organisms. They have a significant effect on soil chemistry and light levels as they slow down the flow of water and capture pollutants and trap sediments. Excess sediment will settle into the benthos aided by the reduction of flow rates caused by the presence of plant stems, leaves and roots. Some plants have the capability of absorbing pollutants into their tissue. Seaweeds are multicellular marine algae and, although their ecologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Alismatales Genera
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, '' Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alismataceae Genera
The water-plantains (Alismataceae) are a family of flowering plants, comprising 19 genera (17 extant and 2 fossil) and 117 species. The family has a cosmopolitan distribution, with the greatest number of species in temperate regions of the Northern Hemisphere. Most of the species are herbaceous aquatic plants growing in marshes and ponds. Description Most Alismataceae are robust perennials, but some may be annual or perennial, depending on water conditions — they are normally perennial in permanent waters, annual in more seasonal conditions but there are exceptions. The stems are corm-like or stoloniferous. Juvenile and submerse leaves are often linear, whilst more mature and emerse leaves can be linear to ovate or even sagittate. Most have a distinct petiole, with a sheathed base. The inflorescence is usually compound with whorls of branches, though some are umbel-like, and others have solitary flowers. The flowers are regular, bisexual or unisexual. There are th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alismataceae
The water-plantains (Alismataceae) are a family of flowering plants, comprising 19 genera (17 extant and 2 fossil) and 117 species. The family has a cosmopolitan distribution, with the greatest number of species in temperate regions of the Northern Hemisphere. Most of the species are Herbaceous plant, herbaceous aquatic plants growing in marshes and ponds. Description Most Alismataceae are robust Perennial plant, perennials, but some may be Annual plant, annual or perennial, depending on water conditions — they are normally perennial in permanent waters, annual in more seasonal conditions but there are exceptions. The Plant stem, stems are corm-like or stoloniferous. Juvenile and submerse Leaf, leaves are often Leaf shape, linear, whilst more mature and emerse leaves can be linear to Leaf shape, ovate or even Leaf shape, sagittate. Most have a distinct Petiole (botany), petiole, with a sheathed base. The inflorescence is usually compound with whorls of branches, though som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of British Postage Stamps
This is a list of British postage stamps issued by the Royal Mail postal service of the United Kingdom, normally referred to in philatelic circles as Great Britain. This list should be consistent with printed publications, and cite sources of any deviation (e.g., magazine issue listing newly found variations). Queen Victoria Line engraved * One Penny Black issued on 1 May for use from 6 May 1840 * Penny Black VR official * Penny Blue * Two penny blue contemporary issue with the Penny Black * One Penny Red issued in 1841 to replace the Penny Black (the first issue with perforations from 1848) * Prince Consort Essay * Two penny blue printed in a new ink. The design has the addition of white * lines above and below the inscriptions * Halfpenny Rose Red issued in 1870 for the reduced postcard and newspaper rate * Three Halfpence Red introduced in 1870 for the reduced printed matter rate Embossed * Sixpence embossed, 1847–54 * Ten Pence embossed, 1847–54 * One Shilling emboss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Mail
, kw, Postya Riel, ga, An Post Ríoga , logo = Royal Mail.svg , logo_size = 250px , type = Public limited company , traded_as = , foundation = , founder = Henry VIII , location = London, England, UK , key_people = * Keith Williams (Non-executive Chairman) * Simon Thompson (CEO) , area_served = United Kingdom , industry = Postal services, courier , products = , services = Letter post, parcel service, EMS, delivery, freight forwarding, third-party logistics , revenue = £12.638 billion(2021) , operating_income = £611 million (2021) , net_income = £620 million (2021) , num_employees = 158,592 (2021) , parent = , divisions = * Royal Mail * Parcelforce Worldwide , subsid = * General Logistics Systems * eCourier * StoreFeeder * Intersoft Systems & Programming , homepage = , dissolved = , footnotes = International Distributions Services plc (formerly Royal Mail plc), trading as Royal Mail, is a British multinational postal ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luronium Rosette
''Luronium natans'' is a species of aquatic plant commonly known as the floating water-plantain. It is the only recognized species in the genus ''Luronium'', native to western and central Europe, from Spain to Britain to Norway east to Ukraine. Description Stems elongated, rising in the water or creeping and rooting at the nodes. Submerged leaves (if present) basal, linear; floating or aerial leaves elliptical to ovate. Flowers hermaphrodite, long-pedunculate in the axils of the floating or aerial leaves. Stamens 6. Carpels 6–15 in an irregular whorl, free, each with 1 ovule; styles apical. Fruitlets achenial, longitudinally many-ribbed, with a short apical beak. 2''n'' = 42. ''Luronium natans'' can be a difficult plant to identify. It is both very variable and resembles many other aquatic plants with strap-like leaves such as bur-reeds (''Sparganium''), young water-plantain plants (''Alisma''), arrowheads (''Sagittaria''), lesser water-plantain (''Baldellia'') and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montgomery Canal At Arddlin - Geograph
Montgomery refers to: People For people with the name Montgomery, see Montgomery (name) Places Belgium * Montgomery Square, Brussels * Montgomery metro station, Brussels Pakistan * Montgomery (town), British India, former name of Sahiwal, Punjab * Montgomery District, an administrative district in the Lahore division of former Punjab Province of British India ** Montgomery Tahsil, an administrative subdivision of Montgomery District in Punjab province of British India United Kingdom Wales * Montgomery, Powys ** Montgomery Canal ** Montgomery Castle * Montgomeryshire (other) United States * Montgomery, Alabama, state capital * Montgomery, California * Montgomery, Georgia * Montgomery, Illinois * Montgomery, Indiana * Montgomery, Iowa * Montgomery, Kentucky * Montgomery, Louisiana * Montgomery, Massachusetts * Montgomery, Michigan * Montgomery, Minnesota * Montgomery, Mississippi * Montgomery, New York (other) * Montgomery, Ohio * Montgomery, Pennsylvania * Montg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luronium Natans In A River
''Luronium natans'' is a species of aquatic plant commonly known as the floating water-plantain. It is the only recognized species in the genus ''Luronium'', native to western and central Europe, from Spain to Britain to Norway east to Ukraine. Description Stems elongated, rising in the water or creeping and rooting at the nodes. Submerged leaves (if present) basal, linear; floating or aerial leaves elliptical to ovate. Flowers hermaphrodite, long-pedunculate in the axils of the floating or aerial leaves. Stamens 6. Carpels 6–15 in an irregular whorl, free, each with 1 ovule; styles apical. Fruitlets achenial, longitudinally many-ribbed, with a short apical beak. 2''n'' = 42. ''Luronium natans'' can be a difficult plant to identify. It is both very variable and resembles many other aquatic plants with strap-like leaves such as bur-reeds (''Sparganium''), young water-plantain plants (''Alisma''), arrowheads (''Sagittaria''), lesser water-plantain (''Baldellia'') and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cleistogamy
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Especially well known in peanuts, peas, and pansies, this behavior is most widespread in the grass family. However, the largest genus of cleistogamous plants is ''Viola''. The more common opposite of cleistogamy, or "closed marriage", is called chasmogamy, or "open marriage". Virtually all plants that produce cleistogamous flowers also produce chasmogamous ones.Meeuse, Bastiaan and Sean Morris. 1984. The sex life of flowers. New York, NY: Facts on File Publishers. pp 110-111. The principal advantage of cleistogamy is that it requires fewer plant resources to produce seeds than does chasmogamy, because development of petals, nectar and large amounts of pollen is not required. This efficiency makes cleistogamy particularly useful for seed production on unfavorable sites or adverse conditions. ''Impatiens capensis,'' for example, has been o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
