|
Dendrosenecio Kilimanjari
''Dendrosenecio kilimanjari'' is a giant groundsel found on Mount Kilimanjaro in Africa, below . Taxonomy It was originally known as ''Senecio kilimanjari'', but a recent botanical reclassification split off some species formerly in ''Senecio'', putting it and various other species in the new genus '' Dendrosenecio''. Both genera are in the family ''Asteraceae''. The giant groundsels of the genus ''Dendrosenecio'' evolved, about a million years ago, from a ''Senecio'' that established itself on Mount Kilimanjaro, with those that survived adapting into ''Dendrosenecio kilimanjari''. This later colonised other mountains by some means—a standard distance for wind dispersal of seeds is a few metres—and these isolated populations adapted in ways different from the parent population, creating new species. Infraspecific name synonymy The infraspecific name In botany, an infraspecific name is the scientific name for any taxon below the rank of species, i.e. an infraspecif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes Mildbraed
Gottfried Wilhelm Johannes Mildbraed (19 December 1879 – 24 December 1954) was a German botanist who specialized in mosses, ferns, and various spermatophytes. He is well known for authoring the most current monograph and taxonomic treatment of the family Stylidiaceae in 1908 as part of the unfinished ''Das Pflanzenreich Heinrich Gustav Adolf Engler (25 March 1844 – 10 October 1930) was a German botanist. He is notable for his work on plant taxonomy and phytogeography, such as ''Die natürlichen Pflanzenfamilien'' (''The Natural Plant Families''), edited with ...'' series. The genus '' Mildbraediodendron'' was named in honor of him.Quattrocchi, U. 1999. CRC World Dictionary of Plant Names: Common Names, Scientific Names, Eponyms, Synonyms, and Etymology.' CRC Press. pp. 1691. References 1879 births 1954 deaths 20th-century German botanists {{Germany-botanist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book ''On the Origin of Species''. He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric speciation, allopatric, peripatric speciation, peripatric, parapatric speciation, parapatric, and sympatric speciation, sympatric. Whether genetic drift is a minor or major contributor to speciation is the subject of much ongoing discussion. Rapid sympatric speciation can take place through polyploidy, such as by doubling of chromosome number; the result is progeny wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of Tanzania
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becomin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senecio Kilimanjari
''Senecio'' is a genus of flowering plants in the daisy family (Asteraceae) that includes ragworts and groundsels. Variously circumscribed taxonomically, the genus ''Senecio'' is one of the largest genera of flowering plants. Description Morphology The flower heads are normally rayed with the heads borne in branched clusters, and usually completely yellow, but green, purple, white and blue flowers are known as well. In its current circumscription, the genus contains species that are annual or perennial herbs, shrubs, small trees, aquatics or climbers. The only species which are trees are the species formerly belonging to '' Robinsonia'' occurring on the Juan Fernández Islands. Chemistry Pyrrolizidine alkaloids are found in all ''Senecio'' species. These alkaloids serve as a natural biocides to deter or even kill animals that would eat them. Livestock generally do not find them palatable. ''Senecio'' species are used as food plants by the larvae of some Lepidoptera species t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrosenecio Johnstonii
''Dendrosenecio johnstonii'', formerly ''Senecio johnstonii'', is a species of giant groundsel found in the middle altitudes of Mount Kilimanjaro in Africa. A recent botanical reclassification split off some species formerly in ''Senecio'', putting the giant groundsels in the new genus ''Dendrosenecio''. It also redefined the former species ''Senecio cottonii'', as a subspecies of ''Dendrosenecio johnstonii''. Both genera are in the family ''Asteraceae''. The giant grounsels of the genus ''Dendrosenecio'' evolved, about a million years ago, from a ''Senecio'' that established itself on Mount Kilimanjaro, with those that survived adapting into ''Dendrosenecio kilimanjari''. As it moved down the mountain, the adaptations necessary for the new environment created the new species, ''Dendrosenecio johnstonii''. Various subspecies are found on other mountains. Description ''Dendrosenecio johnstonii'' can be up to 10 meters tall, and grow to or more in diameter. The centre of the stem, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infraspecific Name
In botany, an infraspecific name is the scientific name for any taxon below the rank of species, i.e. an infraspecific taxon or infraspecies. The scientific names of botanical taxa are regulated by the ''International Code of Nomenclature for algae, fungi, and plants'' (ICN). As specified by the ICN, the name of an infraspecific taxon is a combination of the name of a species and an infraspecific epithet,, Art. 24 separated by a connecting term that denotes the rank of the taxon. An example of an infraspecific name is ''Astrophytum myriostigma'' subvar. ''glabrum'', the name of a subvariety of the species '' Astrophytum myriostigma'' (bishop's hat cactus). In the previous example, ''glabrum'' is the infraspecific epithet. Names below the rank of species of animals and of cultivated plants are regulated by different codes of nomenclature and are formed somewhat differently. Construction of infraspecific names Article 24 of the ICN describes how infraspecific names are const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press was the university press of the University of Cambridge. Granted a letters patent by King Henry VIII in 1534, it was the oldest university press in the world. Cambridge University Press merged with Cambridge Assessment to form Cambridge University Press and Assessment under Queen Elizabeth II's approval in August 2021. With a global sales presence, publishing hubs, and offices in more than 40 countries, it published over 50,000 titles by authors from over 100 countries. Its publications include more than 420 academic journals, monographs, reference works, school and university textbooks, and English language teaching and learning publications. It also published Bibles, runs a bookshop in Cambridge, sells through Amazon, and has a conference venues business in Cambridge at the Pitt Building and the Sir Geoffrey Cass Sports and Social Centre. It also served as the King's Printer. Cambridge University Press, as part of the University of Cambridge, was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adaptation
In biology, adaptation has three related meanings. Firstly, it is the dynamic evolutionary process of natural selection that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process. Thirdly, it is a phenotypic trait or adaptive trait, with a functional role in each individual organism, that is maintained and has evolved through natural selection. Historically, adaptation has been described from the time of the ancient Greek philosophers such as Empedocles and Aristotle. In 18th and 19th-century natural theology, adaptation was taken as evidence for the existence of a deity. Charles Darwin and Alfred Russel Wallace proposed instead that it was explained by natural selection. Adaptation is related to biological fitness, which governs the rate of evolution as measured by changes in allele frequencies. Often, two or more species co-adapt and co-evolve as they develop adaptations tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric B
The given name Eric, Erich, Erikk, Erik, Erick, Eirik, or Eiríkur is derived from the Old Norse name ''Eiríkr'' (or ''Eríkr'' in Old East Norse due to monophthongization). The first element, ''ei-'' may be derived from the older Proto-Norse language, Proto-Norse ''*wikt:Reconstruction:Proto-Germanic/ainaz, aina(z)'', meaning "one, alone, unique", ''as in the form'' ''Æ∆inrikr'' explicitly, but it could also be from ''*wikt:Reconstruction:Proto-Germanic/aiwaz, aiwa(z)'' "everlasting, eternity", as in the Gothic form ''Euric''. The second element ''-wikt:ríkr, ríkr'' stems either from Proto-Germanic language, Proto-Germanic ''*wikt:Reconstruction:Proto-Germanic/rīks, ríks'' "king, ruler" (cf. Gothic ''wikt:𐍂𐌴𐌹𐌺𐍃, reiks'') or the therefrom derived ''*wikt:Reconstruction:Proto-Germanic/rīkijaz, ríkijaz'' "kingly, powerful, rich, prince"; from the common Proto-Indo-European language, Proto-Indo-European root *wikt:Reconstruction:Proto-Indo-European/h₃r� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteraceae
Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of Extant taxon, extant species in each family is unknown. The Asteraceae were first described in the year 1740 and given the original name Composita, Compositae. The family is commonly known as the aster, Daisy (flower), daisy, composite, or sunflower family. Most species of Asteraceae are herbaceous plants, and may be Annual plant, annual, Biennial plant, biennial, or Perennial plant, perennial, but there are also shrubs, vines, and trees. The family has a widespread distribution, from subpolar to tropical regions, in a wide variety of habitats. Most occur in Hot desert climate, hot desert and cold or hot Semi-arid climate, semi-desert climates, and they are found on ever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrosenecio
''Dendrosenecio'' is a genus of flowering plants in the sunflower family. It is a segregate of ''Senecio'', in which it forms the subgenus ''Dendrosenecio''. Its members, the giant groundsels, are native to the higher-altitude zones of ten mountain groups in equatorial East Africa, where they form a conspicuous element of the flora. Description They have a giant rosette habit, with a terminal leaf rosette at the apex of a stout woody stem. When they bloom, the flowers form a large terminal inflorescence. Concomitantly, two to four lateral branches are normally initiated. As a result, old plants have the appearance of candelabras the size of telephone poles, each branch with a terminal rosette. Species ''Dendrosenecio'' varies geographically between mountain ranges, and altitudinally on a single mountain. There has been disagreement among botanists as to which populations of ''Dendrosenecio'' warrant recognition as species, and which should be relegated to the status of subsp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
