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Allenanthus
''Allenanthus'' was a genus of flowering plants in the family Rubiaceae but is no longer recognized. It has been sunk into synonymy with ''Machaonia''. Taxonomy ''Allenanthus'' was named by Paul Standley in 1940 in Annals of the Missouri Botanical Garden.Standley PC. 1940. ''Allenanthus'' pages 344-346. In: Woodson RE, Schery RW. "Contributions toward a flora of Panama". ''Annals of the Missouri Botanical Garden'' 27(3):265-364. It was named in honor of Paul Hamilton Allen (1911-1963). Until 2004, two species had been recognized, but fieldwork has shown that there is a Continuum (theory), continuum of Genetic diversity, variation between them. Comparisons of Plant morphology, morphological Phenotypic trait, characters and DNA sequences have shown that ''Allenanthus'' is Paraphyly, embedded in ''Machaonia ''Machaonia'' is a genus of flowering plants in the family Rubiaceae. It has about 32 species.''Machaonia'' At: World Checklist of Rubiaceae At: Kew Gardens Website. (see ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaonia
''Machaonia'' is a genus of flowering plants in the family Rubiaceae. It has about 32 species.''Machaonia'' At: World Checklist of Rubiaceae At: Kew Gardens Website. (see ''External links'' below). All are indigenous to the neotropics.David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. None has a unique common name. Some species have been called "alfilerillo", a Spanish name for the common and well-known genus ''Erodium''. The type species for ''Machaonia'' is ''Machaonia acuminata''.''Machaonia'' In: Index Nominum Genericorum. In: Regnum Vegetabile (see ''External links'' below). ''Machaonia'' was named by Humboldt and Bonpland in 1806 in their book, ''Plantae Aequinoctiales''.''Machaonia'' in International Plant Names Index. (see ''External links'' below).Alexander von Humboldt and Aimé Bonpland. 1806. ''Plantes équinoxiales recueillies au Mexique :dans l'île de Cuba, dans les provinces de Caracas, de Cumana et de Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guettardeae
Guettardeae is a tribe of flowering plants in the family Rubiaceae and contains about 748 species in 14 genera. Its representatives are widespread geographically and are found in the tropics and subtropics. Genera Currently accepted names * '' Antirhea'' Comm. ex A.Juss. (38 sp) * ''Arachnothryx'' Planch. (107 sp) * ''Bobea'' Gaudich. (4 sp) * ''Chomelia'' Jacq. (79 sp) * '' Gonzalagunia'' Ruiz & Pav. (40 sp) * ''Guettarda'' L. (157 sp) * '' Hodgkinsonia'' F.Muell. (2 sp) * '' Machaonia'' Humb. & Bonpl. (31 sp) * '' Malanea'' Aubl. (40 sp) * ''Neoblakea'' Standl. (2 sp) * ''Rogiera'' Planch. (15 sp) * '' Stenostomum'' C.F.Gaertn. (49 sp) * ''Timonius'' Rumph. ex DC. (182 sp) * '' Tinadendron'' Achille (2 sp) Synonyms * ''Abbottia'' F.Muell. = ''Timonius'' * ''Allenanthus'' Standl. = '' Machaonia'' * ''Anisomeris'' C.Presl = ''Chomelia'' * ''Bellermannia'' Klotzsch ex H.Karst. = '' Gonzalagunia'' * ''Bobaea'' A.Rich. = ''Bobea'' * ''Buena'' Cav. = '' Gon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Carpenter Standley
Paul Carpenter Standley (March 21, 1884 – June 2, 1963) was an American botanist known for his work on neotropical plants. __TOC__ Standley was born on March 21, 1884 in Avalon, Missouri. He attended Drury College in Springfield, Missouri and New Mexico State College, where he received a bachelor's degree in 1907, and received a master's degree from New Mexico State College in 1908. He remained at New Mexico State College as an assistant from 1908–1909. He was the Assistant Curator of the Division of Plants at the United States National Museum from 1909 to 1922. In spring, 1928, he took a position at the Field Museum of Natural History in Chicago, where worked until 1950. While at the Field Museum he did fieldwork in Guatemala between 1938 and 1941. After his retirement in 1950, he moved to the '' Escuela Agricola Panamericana,'' where he worked in the library and herbarium and did field work until 1956, when he stopped doing botanical work. In 1957 he moved to Tegucigalp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Diversity
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species. It is distinguished from ''genetic variability'', which describes the tendency of genetic characteristics to vary. Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that allele. The population will continue for more generations because of the success of these individuals. The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cinchonoideae
Cinchonoideae is a subfamily of flowering plants in the family Rubiaceae and contains about 1700 species in 10 tribes. Tribes * Chiococceae Benth. & Hook.f. * Cinchoneae DC. * Guettardeae DC. * Hamelieae A.Rich. ex DC. * Hymenodictyeae Razafim. & B.Bremer * Hillieae Bremek. ex S.P.Darwin * Isertieae A.Rich. ex DC. * Naucleeae DC. ex Miq. * Rondeletieae DC. ex Miq. Friedrich Anton Wilhelm Miquel (24 October 1811 – 23 January 1871) was a Dutch botanist, whose main focus of study was on the flora of the Dutch East Indies. Early life Miquel was born in Neuenhaus and studied medicine at the University of Groni ... * Strumpfieae Delprete & T.J.Motley External links Gentianales subfamilies Taxa named by Constantine Samuel Rafinesque {{Cinchonoideae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoological names with "-inae". See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoology) In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system consists of species, genus, family, order, class, phylum, kingdom, domain. While ... Sources {{biology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Research
Research is "creativity, creative and systematic work undertaken to increase the stock of knowledge". It involves the collection, organization and analysis of evidence to increase understanding of a topic, characterized by a particular attentiveness to controlling sources of bias and error. These activities are characterized by accounting and controlling for biases. A research project may be an expansion on past work in the field. To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects or the project as a whole. The primary purposes of basic research (as opposed to applied research) are documentation, Discovery (observation), discovery, interpretation (philosophy), interpretation, and the research and development (R&D) of methods and systems for the advancement of human knowledge. Approaches to research depend on epistemology, epistemologies, which vary considerably both within and between humanities and sciences. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical framew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyly
In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and most of its descendants, excluding a few monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia ( reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles and all descendants of that ancestor, including all extant reptiles as well as the extinct synapsids, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNA Sequence
DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. The advent of rapid DNA sequencing methods has greatly accelerated biological and medical research and discovery. Knowledge of DNA sequences has become indispensable for basic biological research, DNA Genographic Projects and in numerous applied fields such as medical diagnosis, biotechnology, forensic biology, virology and biological systematics. Comparing healthy and mutated DNA sequences can diagnose different diseases including various cancers, characterize antibody repertoire, and can be used to guide patient treatment. Having a quick way to sequence DNA allows for faster and more individualized medical care to be administered, and for more organisms to be identified and cataloged. The rapid speed of sequencing attained with modern D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenotypic Trait
A phenotypic trait, simply trait, or character state is a distinct variant of a phenotypic characteristic of an organism; it may be either inherited or determined environmentally, but typically occurs as a combination of the two.Lawrence, Eleanor (2005) ''Henderson's Dictionary of Biology''. Pearson, Prentice Hall. For example, having eye color is a ''character'' of an organism, while blue, brown and hazel versions of eye colour are ''traits''. The term ''trait'' is generally used in genetics, often to describe phenotypic expression of different combinations of alleles in different individual organisms within a single population, such as the famous purple vs. white flower coloration in Gregor Mendel's pea plants. By contrast, in systematics, the term is ''character state'' is employed to describe features that represent fixed diagnostic differences among taxa, such as the absence of tails in great apes, relative to other primate groups. Definition A phenotypic trait is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Morphology
Phytomorphology is the study of the morphology (biology), physical form and external structure of plants.Raven, P. H., R. F. Evert, & S. E. Eichhorn. ''Biology of Plants'', 7th ed., page 9. (New York: W. H. Freeman, 2005). . This is usually considered distinct from plant anatomy, which is the study of the internal Anatomy, structure of plants, especially at the microscopic level. Plant morphology is useful in the visual identification of plants. Recent studies in molecular biology started to investigate the molecular processes involved in determining the conservation and diversification of plant morphologies. In these studies transcriptome conservation patterns were found to mark crucial ontogenetic transitions during the plant life cycle which may result in evolutionary constraints limiting diversification. Scope Plant morphology "represents a study of the development, form, and structure of plants, and, by implication, an attempt to interpret these on the basis of similarit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
