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Floating Water-plantain
''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] |
Constantine Samuel Rafinesque-Schmaltz
Constantine Samuel Rafinesque-Schmaltz (; 22 October 178318 September 1840) was a French early 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 Builders, 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 and his submissions were automati ... [...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] |
Flora Of Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe shares the landmass of Eurasia with Asia, and of Afro-Eurasia with both Africa and Asia. Europe is commonly considered to be Boundaries between the continents#Asia and Europe, separated from Asia by the Drainage divide, watershed of the Ural Mountains, the Ural (river), Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea, and the waterway of the Bosporus, Bosporus Strait. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea with its outlets, the Bosporus and Dardanelles." Europe covers approx. , or 2% of Earth#Surface, Earth's surface (6.8% of Earth's land area), making it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Plants
Aquatic plants, also referred to as hydrophytes, are vascular plants and non-vascular plants that have adapted to live in aquatic environments ( saltwater or freshwater). In lakes, rivers and wetlands, aquatic vegetations provide cover for aquatic animals such as fish, amphibians and aquatic insects, create substrate for benthic invertebrates, produce oxygen via photosynthesis, and serve as food for some herbivorous wildlife. Familiar examples of aquatic plants include waterlily, lotus, duckweeds, mosquito fern, floating heart, water milfoils, mare's tail, water lettuce, water hyacinth, and algae. Aquatic plants require special adaptations for prolonged inundation in water, and for floating at the water surface. The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floating leaves and finely dissected leaves are also common.Sculthorpe, C. D. 1967. The Biology of Aquatic Vascular Plants. Reprinted 1985 Edward Arnold, by London.Hu ... [...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. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alismataceae Genera
The water-plantains (Alismataceae) are a family of flowering plants, comprising 20 genera (17 extant and 3 fossil) and 119 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 three sepa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of British Postage Stamps
A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, but lists are frequently written down on paper, or maintained electronically. Lists are "most frequently a tool", and "one does not ''read'' but only ''uses'' a list: one looks up the relevant information in it, but usually does not need to deal with it as a whole". Lucie Doležalová,The Potential and Limitations of Studying Lists, in Lucie Doležalová, ed., ''The Charm of a List: From the Sumerians to Computerised Data Processing'' (2009). Purpose It has been observed that, with a few exceptions, "the scholarship on lists remains fragmented". David Wallechinsky, a co-author of '' The Book of Lists'', described the attraction of lists as being "because we live in an era of overstimulation, especially in terms of information, and lists help ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Mail
Royal Mail Group Limited, trading as Royal Mail, is a British postal service and courier company. It is owned by International Distribution Services. It operates the brands Royal Mail (letters and parcels) and Parcelforce Worldwide (parcels). Formed in 2001, the company used the name Consignia for a brief period but changed it soon afterwards. Prior to this date, Royal Mail and Parcelforce were (along with Post Office Counters Ltd) part of the Post Office, a UK state-owned enterprise the history of which is summarised below. Long before it came to be a company name, the 'Royal Mail' brand had been used by the General Post Office to identify its distribution network (which over the centuries included horse-drawn mail coaches, horse carts and hand carts, ships, trains, vans, motorcycle combinations and aircraft). The company provides mail collection and delivery services throughout the UK. Letters and parcels are deposited in post or parcel boxes, or are collected in bul ... [...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, 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 * Montgomery, Tennessee * ... [...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''. Cleistogamy is promoted in the tomato plant by a modification of floral structures. This modification includes formation of a stigma enclosing floral structure. 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 e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
