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Gazania
''Gazania'' is a genus of flowering plants in the family Asteraceae, native to Southern Africa.Per Ola Karis. 2007. "Arctotideae" pages 200-207. In: Klaus Kubitzki (series editor); Joachim W. Kadereit and Charles Jeffrey (volume editors). ''The Families and Genera of Vascular Plants'' volume VIII. Springer-Verlag: Berlin; Heidelberg, Germany. They produce large, daisy-like composite flowerheads in brilliant shades of yellow and orange, over a long period in summer. They are often planted as drought-tolerant groundcover. Taxonomic history The genus was first formally described by German botanist Joseph Gaertner in the second volume of his major work ''De Fructibus et Seminibus Plantarum'' in 1791. Gaertner named the genus after Theodorus Gaza, a 15th-century translator of the works of Theophrastus.Seranne Howis, Nigel P. Barker, and Ladislav Mucina. 2009. "Globally grown, but poorly known: species limits and biogeography of ''Gazania'' Gaertn. (Asteraceae) inferred from chlo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gazania Rigens
''Gazania rigens'' (syn. ''G. splendens''), sometimes called treasure flower, is a species of flowering plant in the family Asteraceae, native to coastal areas of southern Africa. It is naturalised elsewhere and is widely cultivated as an ornamental plant. Description ''Gazania rigens'' is a spreading, low-growing, half-hardy perennial, growing to tall and wide, with blue-grey foliage and brilliant yellow, daisy-like composite flowerheads throughout the summer. It is a herbaceous plant that is perennial in South Africa and in the Mediterranean regions, and annual in the gardens of colder regions. It rarely exceeds and forms tufts, often very abundant. Its leaves all basal, numerous, narrow and more or less lanceolate, usually entire, sometimes pennatilobed. The obverse of the leaves is shiny green, the lapel grayish white. Like all compounds, gazania flowers in flower heads that are often taken for simple flowers. The capitula are solitary at the end of peduncles just beyo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gorteria
''Gorteria'' is a genus of small Annual plant, annual herbaceous plants or shrubs that is assigned to the Asteraceae, daisy family (Compositae or Asteraceae). It includes 12 species native to eastern and southern Africa, ranging from Ethiopia to South Africa. Like in almost all Asteraceae, the individual flowers are Merosity, 5-merous, small and clustered in typical heads, and are surrounded by an Bract#Involucral bracts, involucre, consisting of in this case several Whorl (botany), whorls of bracts, which are merged at their base. In ''Gorteria'', the centre of the head is taken by relatively few bisexual and sometimes also male, yellow to orange Asteraceae#Floral heads, disc florets, and is surrounded by one complete whorl of 5–14 infertile cream to dark orange Asteraceae#Floral heads, ray florets, sometimes with a few ray florets nearer to the centre. None, some or all of them may have darker spots at their base. The fruits remain attached to their common base when ripe, and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirpicium
''Gorteria'' is a genus of small annual herbaceous plants or shrubs that is assigned to the daisy family (Compositae or Asteraceae). It includes 12 species native to eastern and southern Africa, ranging from Ethiopia to South Africa. Like in almost all Asteraceae, the individual flowers are 5-merous, small and clustered in typical heads, and are surrounded by an involucre, consisting of in this case several whorls of bracts, which are merged at their base. In ''Gorteria'', the centre of the head is taken by relatively few bisexual and sometimes also male, yellow to orange disc florets, and is surrounded by one complete whorl of 5–14 infertile cream to dark orange ray florets, sometimes with a few ray florets nearer to the centre. None, some or all of them may have darker spots at their base. The fruits remain attached to their common base when ripe, and it is the entire head that breaks free from the plant. One or few seeds germinate inside the flower head which can be found a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundcover
Groundcover or ground cover is any plant that grows low over an area of ground, which protects the topsoil from erosion and drought. In a terrestrial ecosystem, the ground cover forms the layer of vegetation below the shrub layer known as the herbaceous layer, and provides habitats and concealments for (especially fossorial) terrestrial fauna. The most widespread ground covers are grasses of various types. In ecology, groundcover is a difficult subject to address because it is known by several different names and is classified in several different ways. The term "groundcover" could also be referring to "the herbaceous layer", "regenerative layer", "ground flora" or even "step over". In agriculture, ground cover refers to anything that lies on top of the soil and protects it from erosion and inhibits weeds. It can be anything from a low layer of grasses to a plastic material. The term ''ground cover'' can also specifically refer to landscaping fabric, a breathable tarp that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodorus Gaza
Theodorus Gaza (, ''Theodoros Gazis''; ; ), also called Theodore Gazis or by the epithet Thessalonicensis and Thessalonikeus (c. 1398 – c. 1475), was a Greek humanist and translator of Aristotle, one of the Greek scholars who were the leaders of the revival of learning in the 15th century (the Palaeologan Renaissance). Life Theodorus Gaza was born a Greek in an illustrious family in Thessaloniki, Macedonia in about c. 1400 when the city was under its first period of Turkish rule (it was restored to Byzantine rule in 1403). On the final capture of his native city by the Turks in 1430 he escaped to Italy. In December 1440 he was in Pavia, where he became acquainted with Iacopo da San Cassiano, who introduced him to his master Vittorino da Feltre. During a three years' residence in Mantua where Vittorino held the celebrated humanistic school "La Giocosa", he rapidly acquired a competent knowledge of Latin under his teaching, supporting himself meanwhile by giving lessons in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Gaertner
Joseph Gaertner (12 March 1732 – 14 July 1791) was a German botanist, best known for his work on seeds, ''De Fructibus et Seminibus Plantarum'' (1788-1792). Biography He was born in Calw, and studied in Göttingen under Albrecht von Haller. He was primarily a naturalist, but also worked at physics and zoology. He travelled extensively to visit other naturalists. He was professor of anatomy in Tübingen in 1760, and was appointed professor of botany at St Petersburg in 1768, but returned to Calw in 1770. Gaertner made back cross to convert one species into another. Back cross increases nuclear gene frequency His observations were: 1. Dominance of traits 2. Equal contribution of male and female to the progeny 3. No variation in F1 (first generation of descendants) 4. Large variation in F2 (second generation of descendants) including parental and intermediate types 5. Some of F2 plants had entirely new traits but he was unable to give possible explanation for observed dat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists 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. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomic Rank
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a ''taxon'') in a hierarchy that reflects evolutionary relationships. Thus, the most inclusive clades (such as Eukarya and Animalia) have the highest ranks, whereas the least inclusive ones (such as ''Homo sapiens'' or ''Bufo bufo'') have the lowest ranks. Ranks can be either relative and be denoted by an indented taxonomy in which the level of indentation reflects the rank, or absolute, in which various terms, such as species, genus, Family (biology), family, Order (biology), order, Class (biology), class, Phylum (biology), phylum, Kingdom (biology), kingdom, and Domain (biology), domain designate rank. This page emphasizes absolute ranks and the rank-based codes (the International Code of Zoological Nomenclature, Zoological Code, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helmut Roessler
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 (1944–2023), 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 Duckadam (1959–2024), Romanian footballer *Helmut Fischer (1926–1997), German actor * Hellmut von Gerlach (1866–1935), German journalist * Helmut Goebbels (1935–1945), only son of Joseph Goebbels * Helmut Graeb, German electrical engineer *Helmu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Publishing
Academic publishing is the subfield of publishing which distributes Research, academic research and scholarship. Most academic work is published in academic journal articles, books or Thesis, theses. The part of academic written output that is not formally published but merely printed up or posted on the Internet is often called "grey literature". Most scientific and scholarly journals, and many academic and scholarly books, though not all, are based on some form of academic peer review, peer review or editorial refereeing to qualify texts for publication. Peer review quality and selectivity standards vary greatly from journal to journal, publisher to publisher, and field to field. Most established academic disciplines have their own journals and other outlets for publication, although many academic journals are somewhat interdisciplinarity, interdisciplinary, and publish work from several distinct fields or subfields. There is also a tendency for existing journals to divide into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
