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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] |
Gymnocalycium
''Gymnocalycium'', commonly called chin cactus, is a genus of about 70 South American species of cactus. The genus name ''Gymnocalycium'' (from Greek, "naked calyx") refers to the flower buds bearing no hair or spines. Their main area of distribution is Argentina, part of Uruguay, Paraguay, southern Bolivia and part of Brazil. Most species are rather small varying from 4 to 15 centimetres in size. In cultivation they are popular for their easy flowering habits, and the flowers are generally brightly coloured. Where temperatures fall below they must be cultivated under glass with heat. Species * '' Gymnocalycium alboareolatum'' * ''Gymnocalycium amerhauseri'' * '' Gymnocalycium andreae'' * ''Gymnocalycium anisitsii'' * '' Gymnocalycium baldianum'' * '' Gymnocalycium bayrianum'' * '' Gymnocalycium berchtii'' * ''Gymnocalycium bodenbenderianum'' * ''Gymnocalycium bruchii'' * ''Gymnocalycium calochlorum'' * ''Gymnocalycium capillaense'' * ''Gymnocalycium castellanosii'' * ''Gymnoca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
