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Felicia Clavipilosa
''Felicia clavipilosa'' is an upright, richly branched shrub of up to high, that is assigned to the family Asteraceae. It has alternately arranged leaves, and flower heads with 3–4 whorls of involucral bracts with many yellow disc florets in the centre. Very characteristic for the species are the short club-shaped hairs on its fruits. There are two subspecies. Subsp. ''clavipilosa'' has narrowly lance-shaped entire leaves with one vein and pale mauve ray florets. Subspecies ''transvaalensis'' has lance-shaped leaves with one or three veins and white ray florets. The species occurs in southern Africa, with subsp. ''clavipilosa'' having a western distribution in Zambia, Zimbabwe, Namibia, Botswana and South Africa, and subsp. ''transvaalensis'' restricted to the east, from Zimbabwe, through Botswana to South Africa. The subspecies ''transvaalensis'' is sometimes called pokkiesblom in Afrikaans. Description ''Felicia clavipilosa'' subsp. ''clavipilosa'' is an upright, richly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stigma (botany)
The stigma () is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals ( biotic pollination), or in rare cases from surrounding water (hydrophily). Stigma can vary from long and sle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelis Eliza Bertus Bremekamp
Cornelis Eliza Bertus Bremekamp (7 February 1888, in Dordrecht – 21 December 1984) was a Dutch botanist. He received his education at the University of Utrecht, and performed as a botanical researcher in Indonesia and South Africa. In South Africa he collaborated with German botanist Herold Georg Wilhelm Johannes Schweickerdt (1903–1977). From 1924 to 1931 he was a professor at Transvaal University in Pretoria, where he conducted studies of the genus ''Pavetta''. During this time period he collected plants from northern Transvaal, Rhodesia, and Mozambique. A portion of his career was spent at the herbarium in Utrecht, where he specialized in studies of Rubiaceae and Acanthaceae. Eponymy '' Bremekampia'' (Acanthaceae) '' Batopedina'' (Rubiaceae) '' Toddaliopsis bremekampii'' (Rutaceae The Rutaceae is a family, commonly known as the rue [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johan Wilhelm Heinrich Giess
Johan Wilhelm Heinrich Giess aka Willi Giess (21 February 1910, in Frankfurt-am-Main – 28 September 2000, in Swakopmund) is noted for having started an official herbarium at Windhoek, his extensive collection of Namibian plants and generally furthering botanical knowledge of the territory. Giess arrived in South West Africa with his parents on 4 February 1926 and was drawn into farming by being one of the first students to attend the Agricultural College of Neudamm near Windhoek. From 1931-33 he was employed by the Animal Breeding Institute at the University of Halle where he specialised in karakul breeding. On his return to South West Africa, he managed a karakul farm and later bought his own farm in 1937 at Dornfontein Süd. With the outbreak of the Second World War he and other Germans were interned in South Africa at a camp called Andalusia, now known as Jan Kempdorp. During his internment he studied botany witProf. Otto Heinrich Volk who had arranged classes for sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Merxmüller
Hermann Merxmüller (30 August 1920 Munich – 8 February 1988) was a German botanist and taxonomist. Merxmüller's interest in botany was noticed at an early age by his mentors, and he was encouraged to collect in the Bavarian Alps and countryside. At 17 he joined the Bavarian Botanical Society and at the end of World War II was awarded a scholarship by the Maximilian Foundation, enabling him to study biology at the University of Munich. He completed his studies with a dissertation on plant distribution in the Alps, then taking up a post as scientific assistant at the Botanische Staatsammlung. Here the institute's director, Karl Suessenguth, employed him to assist in the creation of a prodromus or introductory treatise on Namibian plants, "''Prodromus einer Flora von Südwestafrika''". Merxmüller’s interests led him to the genus ''Hieracium'', and eventually to an abiding interest in the family Compositae. He visited Namibia on five occasions, collecting mostly in the compan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klein Windhoek
Klein Windhoek ( in German) is an affluent suburb of Windhoek, the capital of Namibia. History The British explorer James Alexander had already visited the area in 1837. Klein Windhoek is the oldest part of the town, having been established in 1840 by Jonker Afrikaner and his 800-strong group. He had requested the services of a missionary, and the Rhenish Missionary Society (RMS) built the first house in the area in the same year. In 1842, missionaries Carl Hugo Hahn and Franz Heinrich Kleinschmidt worked here. They called the place ''Elberfeld'', but Jonker Afrikaner's name prevailed. They were replaced by Wesleyan missionaries in 1844. In 1896, Roman Catholic Roman or Romans most often refers to: *Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD * Roman people, the people of ancient Rome *'' Epistle to the Romans'', shortened to ''Romans'', a let ... missionaries arrived. They purchased the RMS land in 1899 and conv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy (biology)
In biology, taxonomy () is the scientific study of naming, defining ( circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a more inclusive group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (''division'' is sometimes used in botany in place of ''phylum''), class, order, family, genus, and species. The Swedish botanist Carl Linnaeus is regarded as the founder of the current system of taxonomy, as he developed a ranked system known as Linnaean taxonomy for categorizing organisms and binomial nomenclature for naming organisms. With advances in the theory, data and analytical technology of biological systematics, the Linnaean system has transformed into a system of modern biological classification intended to reflect the evolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudolf Schlechter
Friedrich Richard Rudolf Schlechter (16 October 1872 – 16 November 1925) was a German taxonomist, botanist, and author of several works on orchids. He went on botanical expeditions in Africa, Indonesia, New Guinea, South and Central America and Australia. His vast herbarium was destroyed during the bombing of Berlin in 1945. Early life Rudolf Schlechter was born on 16 October 1872 in Berlin, the third of six children. His father Hugo Schlechter was a lithographer. After finishing school at the Friedrich Wilhelm Gymnasium he started a horticulture education, first at the gardening market of Mrs. Bluth and then at the University of Berlin garden. There he worked as an assistant till the autumn of 1891. His brother was Max Schlechter (1874–1960), was a German trader and collector of natural history specimens. Career Rudolf Schlechter began his career of botanical fieldwork by leaving Europe in 1891 to journey to Africa and subsequently across Indonesia and Australia. Thr ... [...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] |
Ploidy
Ploidy () is the number of complete sets of chromosomes in a cell (biology), cell, and hence the number of possible alleles for Autosome, autosomal and Pseudoautosomal region, pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, Tissue (biology), tissues, and Individual#Biology, individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploidy, polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexual reproduction, sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetraploid
Polyploidy is a condition in which the cells of an organism have more than one pair of ( homologous) chromosomes. Most species whose cells have nuclei (eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set contains one or more chromosomes and comes from each of two parents, resulting in pairs of homologous chromosomes between sets. However, some organisms are polyploid. Polyploidy is especially common in plants. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Males of bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by meio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dehiscence (botany)
Dehiscence is the splitting of a mature plant structure along a built-in line of weakness to release its contents. This is common among fruits, anthers and sporangia. Sometimes this involves the complete detachment of a part; structures that open in this way are said to be dehiscent. Structures that do not open in this way are called indehiscent, and rely on other mechanisms such as decay or predation to release the contents. A similar process to dehiscence occurs in some flower buds (e.g., ''Platycodon'', ''Fuchsia''), but this is rarely referred to as dehiscence unless wikt:circumscissile, circumscissile dehiscence is involved; anthesis is the usual term for the opening of flowers. Dehiscence may or may not involve the loss of a structure through the process of abscission. The lost structures are said to be wikt:caducous, caducous. Association with crop breeding Manipulation of dehiscence can improve crop yield since a Trait (biological), trait that causes seed dispersal i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
