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Crassula Elegans
''Crassula elegans'', the elegant crassula, is a flowering plant species in the genus ''Crassula''. Subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... are: * ''Crassula elegans ssp. elegans'' Schoenl. & Baker f. * ''Crassula elegans ssp. namibensis'' ( Friedr.) ToelkenToelken J. S. Afr. Bot. 41(2): 102 1975 References External links elegans Plants described in 1902 {{Crassulaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selmar Schonland
Selmar Schonland (15 August 1860 – 22 April 1940), originally spelt ''Schönland'', the founder of the Department of Botany at Rhodes University, was a German immigrant, who came to the Eastern part of the Cape Colony in 1889 to take up an appointment as curator of the Albany Museum. He came to Grahamstown via a doctorate at the University of Hamburg and a post at Oxford University (1886–1889 as curator of the Fielding Herbarium and a lecturer in Botany). Working under Prof. Sir Isaac Bayley Balfour and Prof. Sydney Howard Vines, he developed an interest in the family ''Crassulaceae'' and contributed an account of this group to Engler & Prantl's ''Natürl. Pflanzenfamilien''. While at Oxford, he translated, with Edward Bagnall Poulton and Arthur Shipley, August Weismann's "Essays upon Heredity and Kindred Biological Problems". Coming to the museum in Grahamstown gave him the opportunity to broaden his interests and develop the second largest herbarium in South Africa which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmund Gilbert Baker
Edmund Gilbert Baker (1864–1949) was a British plant collector and botanist. He was the son of John Gilbert Baker. Works * ''Synopsis of Malveae'', 1895 * ''The plants of Milanji, Nyassa-land''. Con James Britten. 1894 * ''Catalogue of the Plants collected by Mr. & Mrs. P.A. Talbot in the Oban district, South Nigeria. London'' (impreso por orden de Trustees, British Museum (Natural History) * ''Leguminosae of Tropical Africa'', part 1, [1]-215, in 1926; part 2, [i-iii], 216-607, Jul 1929; part 3, [i-iii], 608-693, from 1930. Among species he named are ''Banksia burdettii'' and ''Banksia ashbyi''. References {{DEFAULTSORT:Baker, Edmund Gilbert 1864 births 1949 deaths English botanists Fellows of the Linnean Society of London ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crassula
''Crassula'' is a genus of succulent plants containing about 200 accepted species, including the popular jade plant (''Crassula ovata''). They are members of the stonecrop family (Crassulaceae) and are native to many parts of the globe, but cultivated varieties originate almost exclusively from species from the Eastern Cape of South Africa. Crassulas are usually propagated by stem or leaf cuttings. Most cultivated forms will tolerate some small degree of frost, but extremes of cold or heat will cause them to lose foliage and die. Taxonomy ''Crassula'' was first formally described by Carl Linnaeus in 1753 with 10 species. Etymology The name crassula comes from the Latin adjective ''crassus'', meaning thick, referring to the thickening of the succulent leaves. List of selected species *''Crassula alata'' *'' Crassula alba'' *''Crassula alpestris'' (Sand-Coated Crassula) *'' Crassula alstonii'' *''Crassula aquatica'' (common pigmyweed, water pygmyweed) *'' Crassula arbore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helmut Richard Toelken
Helmut is a German name. Variants include Hellmut, Helmuth, and Hellmuth. From old German, the first element deriving from either ''heil'' ("healthy") or ''hiltja'' ("battle"), and the second from ''muot'' ("spirit, mind, mood"). Helmut may refer to: People A–L *Helmut Angula (born 1945), Namibian politician *Helmut Ashley (1919–2021), Austrian director and cinematographer *Helmut Bakaitis (born 1944), Australian director and actor *Helmut Berger (born 1944), Austrian actor *Helmut Dantine (1917–1982), Austrian actor *Helmut Deutsch (born 1945), Austrian classical pianist *Helmut Ditsch (born 1962), Argentine painter *Hellmut Diwald (1924–1993), German historian * Helmut Donner (born 1941), Austrian high jumper *Helmut Fischer (1926–1997), German actor *Hellmut von Gerlach (1866–1935), German journalist * Helmut Goebbels (1935–1945), only son of Joseph Goebbels *Helmut Griem (1932–2004), German actor *Helmut Gröttrup (1916–1981), German rocket scientist *Helmut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
