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Requienia (plant)
''Requienia'' is a genus of flowering plants in the family Fabaceae. It includes two species of herbs native to Botswana, Caprivi Strip, Namibia, and Zambia, and the Cape Provinces, Free State (province), Free State and Northern Provinces of South Africa. They grow on sand in dry tropical wooded grassland, shrubland, and bushland in the southern Zambezian region and the Kalahari and Highveld regions. The genus name of ''Requienia'' is in honour of Esprit Requien (1788–1851), who was a French naturalist, who made contributions in the fields of conchology, palaeontology and especially botany. The genus was circumscription (taxonomy), circumscribed by Augustin Pyramus de Candolle in Mem. Fam. Legum. on page 224 in 1825. References Millettieae Fabaceae genera Flora of Southern Africa Taxa named by Augustin Pyramus de Candolle {{Millettieae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augustin Pyramus De Candolle
Augustin Pyramus (or Pyrame) de Candolle (, , ; 4 February 17789 September 1841) was a Swiss botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at a herbarium. Within a couple of years de Candolle had established a new genus, and he went on to document hundreds of plant families and create a new natural plant classification system. Although de Candolle's main focus was botany, he also contributed to related fields such as phytogeography, agronomy, paleontology, medical botany, and economic botany. De Candolle originated the idea of "Nature's war", which influenced Charles Darwin and the principle of natural selection. de Candolle recognized that multiple species may develop similar characteristics that did not appear in a common evolutionary ancestor; a phenomenon now known as convergent evolution. During his work with plants, de Candolle noticed that plant leaf movements follow a near-24-hour cycle in constant light, suggestin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zambezian Region
The Zambezian region is a large biogeographical region in Africa. The Zambezian region includes woodlands, savannas, grasslands, and thickets, extending from east to west in a broad belt across the continent. The Zambezian region lies south of the rainforests of the Guineo-Congolian region. The Zambezian region is bounded by deserts and xeric shrublands on the southwest, the Highveld grasslands of South Africa to the south, and the subtropical Maputaland forests on the southeast. Vegetation types The dominant vegetation types in the Zambezian region include: * Dry deciduous forest and scrub forest * Zambezian wooded grassland * Itigi deciduous thicket * Miombo woodland * Mopane woodland * Undifferentiated woodland * Zambezian flooded grasslands and savannas * Zambezian halophytics Biodiversity Botanist Frank White estimated that the region has 8500 species of plants, of which 4590, or 54%, are endemic. The Zambezian region is a centre of diversity for tree species in the genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fabaceae Genera
The Fabaceae or Leguminosae,International Code of Nomenclature for algae, fungi, and plants. Article 18.5 states: "The following names, of long usage, are treated as validly published: ....Leguminosae (nom. alt.: Fabaceae; type: Faba Mill. Vicia L.; ... When the Papilionaceae are regarded as a family distinct from the remainder of the Leguminosae, the name Papilionaceae is conserved against Leguminosae." English pronunciations are as follows: , and . commonly known as the legume, pea, or bean family, are a large and agriculturally important of |
Millettieae
The tribe Millettieae is one of the subdivisions of the plant family Fabaceae. The following genera are recognized by the USDA. In 2019, some genera USDA places in this tribe were moved to tribe Wisterieae; these are listed at the end. * '' Aganope'' Miq. * ''Antheroporum'' Gagnep. * ''Apurimacia'' Harms * ''Austrosteenisia'' R. Geesink * ''Bergeronia'' Micheli * ''Burkilliodendron'' Sastry * ''Chadsia'' Bojer * '' Craibia'' Harms & Dunn * '' Craspedolobium'' Harms * ''Dahlstedtia'' Malme * ''Dalbergiella'' Baker f. * '' Deguelia'' Aubl. * '' Derris'' Lour. * ''Dewevrea'' Micheli * '' Disynstemon'' R. Vig. * '' Fordia'' Hemsl. * '' Hesperothamnus'' Brandegee * '' Kunstleria'' Prain * '' Leptoderris'' Dunn * ''Lonchocarpus'' Kunth * '' Margaritolobium'' Harms * ''Millettia'' Wight & Arn. * '' Muellera'' L. f. * ''Mundulea'' (DC.) Benth. * '' Ostryocarpus'' Hook. f. * '' Paratephrosia'' Domin * '' Philenoptera'' Hochst. ''ex'' A.Rich. * '' Piscid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botany
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (''botanē'') meaning " pasture", " herbs" "grass", or " fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – ed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeontology
Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology). Paleontological observations have been documented as far back as the 5th century BC. The science became established in the 18th century as a result of Georges Cuvier's work on comparative anatomy, and developed rapidly in the 19th century. The term itself originates from Greek (, "old, ancient"), (, (gen. ), "being, creature"), and (, "speech, thought, study"). Paleontology lies on the border between biology and geology, but differs from archaeology in that it excludes the study of anatomically modern humans. It now uses techniques drawn from a wide range of sciences, including biochemistry, mathematics, and engineering. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conchology
Conchology () is the study of mollusc shells. Conchology is one aspect of malacology, the study of molluscs; however, malacology is the study of molluscs as whole organisms, whereas conchology is confined to the study of their shells. It includes the study of land and freshwater mollusc shells as well as seashells and extends to the study of a gastropod's operculum. Conchology is now sometimes seen as an archaic study, because relying on only one aspect of an organism's morphology can be misleading. However, a shell often gives at least some insight into molluscan taxonomy, and historically the shell was often the only part of exotic species that was available for study. Even in current museum collections it is common for the dry material (shells) to greatly exceed the amount of material that is preserved whole in alcohol. Conchologists mainly deal with four molluscan orders: the gastropods (snails), bivalves (clams), Polyplacophora (chitons) and Scaphopoda (tusk shells). C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Esprit Requien
Esprit Requien (6 May 1788, Avignon – 30 May 1851, Bonifacio, Corse-du-Sud) was a French naturalist, who made contributions in the fields of conchology, paleontology and especially botany. From the age of 18, he was associated with the botanical garden in the city of Avignon. He performed extensive studies of flora native to Corsica and in the environs of Mont Ventoux. During his lifetime, he amassed an herbarium of 300,000 specimens.Prosopo Les sociétés savantes In the fields of conchology and palaeontology, he conducted collecting expeditions to the , and |
Highveld
The Highveld (Afrikaans: ''Hoëveld'', where ''veld'' means "field") is the portion of the South African inland plateau which has an altitude above roughly 1500 m, but below 2100 m, thus excluding the Lesotho mountain regions to the south-east of the Highveld. It is home to some of the country's most important commercial farming areas, as well as its largest concentration of metropolitan centres, especially the Gauteng conurbation, which accommodates one-third of South Africa's population. Location and description The Highveld constitutes almost the whole of the Free State, and Gauteng Provinces, and portions of the surrounding areas: the western rim of Lesotho, and portions of the Eastern Cape, Northern Cape, North West, Limpopo, and Mpumalanga Provinces of South Africa. The highest part of the Highveld, around 2100 m, is its northeastern well-defined boundary, where the plateau escarpment (the Mpumalanga Drakensberg) separates it from the Mpumalanga Lowveld, (containing, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalahari
The Kalahari Desert is a large semi-arid sandy savanna in Southern Africa extending for , covering much of Botswana, and parts of Namibia and South Africa. It is not to be confused with the Angolan, Namibian, and South African Namib coastal desert, whose name is of Khoekhoegowab origin and means "vast place". Etymology ''Kalahari'' is derived from the Tswana word ''Kgala'', meaning "the great thirst", or ''Kgalagadi'', meaning "a waterless place"; the Kalahari has vast areas covered by red sand without any permanent surface water. History The Kalahari Desert was not always a dry desert. The fossil flora and fauna from Gcwihaba Cave in Botswana indicates that the region was much wetter and cooler at least from 30 to 11 thousand BP (before present) especially after 17,500 BP. Geography Drainage of the desert is by dry black valleys, seasonally inundated pans and the large salt pans of the Makgadikgadi Pan in Botswana and Etosha Pan in Namibia. The only permanent ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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