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Catasetum
''Catasetum'', abbreviated as Ctsm. in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with 166 species, many of which are highly prized in horticulture. Species of the genus ''Catasetum'' occur from Mexico to Argentina, including much of Central America, the West Indies, and South America. The largest number of species is in Brazil. Biology They have thick, cigar-shaped pseudobulbs which are clustered. The leaves are pleated in the upper part and deciduous. The pseudobulbs become spiny after the leaves have dropped. The inflorescence is borne on the basis. It consists of very fleshy flowers that are unisexual, which is exceptional for orchids. The colorful male and yellowish-green female flowers are typically situated on different plants, a phenomenon known as dioecy. Which type of flower a plant produces is determined by the conditions under which it grows. Male and female flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catasetum Macrocarpum Female - Flickr 006
''Catasetum'', abbreviated as Ctsm. in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with 166 species, many of which are highly prized in horticulture. Species of the genus ''Catasetum'' occur from Mexico to Argentina, including much of Central America, the West Indies, and South America. The largest number of species is in Brazil. Biology They have thick, cigar-shaped pseudobulbs which are clustered. The Leaf, leaves are pleated in the upper part and deciduous. The pseudobulbs become spiny after the leaves have dropped. The inflorescence is borne on the basis. It consists of very fleshy flowers that are unisexual, which is exceptional for orchids. The colorful male and yellowish-green female flowers are typically situated on different plants, a phenomenon known as dioecy. Which type of flower a plant produces is determined by the conditions under which it grows. Male and fema ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catasetum Pileatum Orchi 088
''Catasetum'', abbreviated as Ctsm. in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with 166 species, many of which are highly prized in horticulture. Species of the genus ''Catasetum'' occur from Mexico to Argentina, including much of Central America, the West Indies, and South America. The largest number of species is in Brazil. Biology They have thick, cigar-shaped pseudobulbs which are clustered. The leaves are pleated in the upper part and deciduous. The pseudobulbs become spiny after the leaves have dropped. The inflorescence is borne on the basis. It consists of very fleshy flowers that are unisexual, which is exceptional for orchids. The colorful male and yellowish-green female flowers are typically situated on different plants, a phenomenon known as dioecy. Which type of flower a plant produces is determined by the conditions under which it grows. Male and female flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catasetum Deltoideum - Fl 1
''Catasetum'', abbreviated as Ctsm. in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with 166 species, many of which are highly prized in horticulture. Species of the genus ''Catasetum'' occur from Mexico to Argentina, including much of Central America, the West Indies, and South America. The largest number of species is in Brazil. Biology They have thick, cigar-shaped pseudobulbs which are clustered. The leaves are pleated in the upper part and deciduous. The pseudobulbs become spiny after the leaves have dropped. The inflorescence is borne on the basis. It consists of very fleshy flowers that are unisexual, which is exceptional for orchids. The colorful male and yellowish-green female flowers are typically situated on different plants, a phenomenon known as dioecy. Which type of flower a plant produces is determined by the conditions under which it grows. Male and female flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catasetum Saccatum
''Catasetum saccatum'', the sack-shaped catasetum, is a species of orchid Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering .... saccatum Plants described in 1840 {{Cymbidieae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertilisation Of Orchids
''Fertilisation of Orchids'' is a book by English naturalist Charles Darwin published on 15 May 1862 under the full explanatory title ''On the Various Contrivances by Which British and Foreign Orchids Are Fertilised by Insects, and On the Good Effects of Intercrossing''. – Bibliographical introduction from: Freeman, R. B. (1977) ''The Works of Charles Darwin: An Annotated Bibliographical Handlist''. 2nd edn. Dawson: Folkestone. Darwin's previous book, ''On the Origin of Species'', had briefly mentioned evolutionary interactions between insects and the plants they fertilised, and this new idea was explored in detail. Field studies and practical scientific investigations that were initially a recreation for Darwin—a relief from the drudgery of writing—developed into enjoyable and challenging experiments. Aided in his work by his family, friends, and a wide circle of correspondents across Britain and worldwide, Darwin tapped into the contemporary vogue for growing exotic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchid
Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering plants. The Orchidaceae have about 28,000 currently accepted species, distributed in about 763 genera. (See ''External links'' below). The determination of which family is larger is still under debate, because verified data on the members of such enormous families are continually in flux. Regardless, the number of orchid species is nearly equal to the number of bony fishes, more than twice the number of bird species, and about four times the number of mammal species. The family encompasses about 6–11% of all species of seed plants. The largest genera are ''Bulbophyllum'' (2,000 species), ''Epidendrum'' (1,500 species), ''Dendrobium'' (1,400 species) and ''Pleurothallis'' (1,000 species). It also includes ''Vanilla'' (the genus of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Darwin
Charles Robert Darwin ( ; 12 February 1809 – 19 April 1882) was an English naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology. His proposition that all species of life have descended from a common ancestor is now generally accepted and considered a fundamental concept in science. In a joint publication with Alfred Russel Wallace, he introduced his scientific theory that this branching pattern of evolution resulted from a process he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding. Darwin has been described as one of the most influential figures in human history and was honoured by burial in Westminster Abbey. Darwin's early interest in nature led him to neglect his medical education at the University of Edinburgh; instead, he helped to investigate marine invertebrates. His studies at the University of Cambridge's Christ's Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrmecophyte
Myrmecophytes (; literally "ant-plant") are plants that live in a mutualistic association with a colony of ants. There are over 100 different genera of myrmecophytes. These plants possess structural adaptations that provide ants with food and/or shelter. These specialized structures include domatia, food bodies, and extrafloral nectaries. In exchange for food and shelter, ants aid the myrmecophyte in pollination, seed dispersal, gathering of essential nutrients, and/or defense. Specifically, domatia adapted to ants may be called myrmecodomatia. Mutualism Myrmecophytes share a mutualistic relationship with ants, benefiting both the plants and ants. This association may be either facultative or obligate. Obligate mutualism In obligate mutualisms, both of the organisms involved are interdependent; they cannot survive on their own. An example of this type of mutualism can be found in the plant genus ''Macaranga''. All species of this genus provide food for ants in various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wardian Case
The Wardian case was an early type of terrarium, a sealed protective container for plants. It found great use in the 19th century in protecting foreign plants imported to Europe from overseas, the great majority of which had previously died from exposure during long sea journeys, frustrating the many scientific and amateur botanists of the time. The Wardian case was the direct forerunner of the modern terrarium and vivarium and the inspiration for the glass aquarium. It is named after Nathaniel Bagshaw Ward (1791–1868) of London, who promoted the case after experiments. He published a book titled ''On the Growth of Plants in Closely Glazed Cases'' in 1842. A Scottish botanist named A. A. Maconochie had created a similar terrarium almost a decade earlier, but his failure to publish meant that Ward received credit as the sole inventor. History and development Ward was a physician with a passion for botany. His personally collected herbarium amounted to 25,000 specimens. The fern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen
Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System. At standard temperature and pressure, two atoms of the element bond to form N2, a colorless and odorless diatomic gas. N2 forms about 78% of Earth's atmosphere, making it the most abundant uncombined element. Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids ( DNA and RNA) and in the energy transfer molecule adenosine triphosphate. The human body contains about 3% nitrogen by mass, the fourth most abundant element in the body after oxygen, carbon, and hydrogen. The nitrogen cycle describes the movement of the element from the air, into the biosphere and organic compounds, then back into the atmosphere. Many indus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epiphyte
An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone (e.g., many mosses, liverworts, lichens, and algae) or in the tropics (e.g., many ferns, cacti, orchids, and bromeliads). Epiphyte species make good houseplants due to their minimal wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Moore (biographer)
James Moore is a historian of science at the Open University and the University of Cambridge and visiting scholar at Harvard University, is noted as the author of several biographies of Charles Darwin. As a Cambridge research scholar and a member of the teaching staff at the Open University, he has studied and written about Darwin since the 1970s, co-authoring with Adrian Desmond the major biography ''Darwin'', and also writing ''The Darwin Legend,'' ''The Post-Darwinian Controversies,'' and many articles and reviews. Publications *James Moore. (1979). ''The Post-Darwinian Controversies: A Study of the Protestant Struggle to Come to Terms with Darwin in Great Britain and America, 1870-1900'', Cambridge University Press * * * Notes References * Adrian Desmond and James Moore, ''Darwin'', London: Michael Joseph, the Penguin Group, 1991, * ''The Darwin Legend'', Hodder & Stoughton Religious, 1995, External linksSOF: Evolution and Wonder - Understanding Charles Darwin (Speaking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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