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Hoplestigma
''Hoplestigma'' is a genus of flowering plants in the family Boraginaceae, although this is disputed, and it has been placed in its own family Hoplestigmataceae. Its two species are native to Cameroon, Gabon, Ivory Coast and Liberia in western tropical Africa. Taxonomy The genus ''Hoplestigma'' was established by Jean Baptiste Louis Pierre in 1899. The genus name ''Hoplestigma'' is derived from the Greek , "a hoof or a cloven hoof" and ''stigma'', "a flower stigma". The botanical name is a reference to the deeply bifid style. The family placement of the genus has varied. It was traditionally included in Boraginaceae ''sensu lato'', as it was in the APG IV system, and by Plants of the World Online . A study of pollen in 1989 suggested that ''Hoplestigma'' might be related to the family Ehretiaceae (= Boraginaceae subfamily Ehretioideae). In a 2014 molecular phylogenetic study based on chloroplast DNA, ''Hoplestigma'' formed a strongly supported clade with '' Coldenia'' and gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boraginaceae
Boraginaceae, the Borago, borage or forget-me-not family, includes about 2,000 species of shrubs, trees, and herbs in 146 to 154 genus, genera with a worldwide distribution. The APG IV system from 2016 classifies the Boraginaceae as single family of the order Boraginales within the asterids. Under the older Cronquist system, it was included in the Lamiales, but clearly is no more similar to the other families in this order than it is to families in several other asterid orders. A revision of the Boraginales, also from 2016, split the Boraginaceae into 11 distinct families: Boraginaceae ''sensu stricto'', Codonaceae, Coldeniaceae, Cordiaceae, Ehretiaceae, Heliotropiaceae, Hoplestigmataceae, Hydrophyllaceae, Lennoaceae, Namaceae, and Wellstediaceae. These plants have alternately arranged leaves, or a combination of alternate and opposite leaves. The leaf blades usually have a narrow shape; many are linear or lance-shaped. They are smooth-edged or toothed, and some have petiole (bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Baptiste Louis Pierre
Jean Baptiste Louis Pierre (23 October 1833 – 30 October 1905), also known as J. B. Louis Pierre, was a French Botany, botanist known for his Asian studies. Early life Pierre was born in Saint-André, Réunion, Saint-André, Réunion, and studied in Paris before working in the botanical gardens of Calcutta, India. Career In 1864 he founded the Saigon Zoo and Botanical Gardens, which he directed until 1877. Afterward, he returned to Paris and lived at 63 rue Monge, near the Paris Herbarium. In 1883, he moved to Charenton, then to Villeneuve-Saint-Georges, then (circa 1893) to Saint-Mandé. Finally, he settled at 18 rue Cuvier in Paris, where he resided until his death. Pierre made many scientific explorations in tropical Asia. His publications include the ''Flore forestière de la Cochinchine'' (1880-1907), an article "Sur les plantes à caoutchouc de l'Indochine" (''Revue des cultures coloniales'', 1903) and the section on Sapotaceae in the ''Notes botaniques'' (1890-18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Friedrich Gilg
Ernest (or Ernst) Friedrich Gilg (12 January 1867 in Baden-Württemberg, Germany – 11 October 1933 in Berlin) was a German botanist. Life Gilg was curator of the Botanical Museum in Berlin. With fellow botanist Heinrich Gustav Adolf Engler, Adolf Engler, he co-authored and published a syllabus on botany, botanical families, ''Syllabus der Pflanzenfamilien'' (8th edition 1919). He also made contributions to Engler's "''Das Pflanzenreich''", (e.g. the section on the family Monimiaceae). The Poaceae grass genus, ''Gilgiochloa'', was Posthumous recognition, posthumously named after him. His spouse, Charlotte Gilg-Benedict (1872–1936), was co-author in some of his publications, and has the author abbreviation Gilg-Ben. Work * ''Pharmazeutische Warenkunde'', published 1911 * ''Grundzüge der Botanik für Pharmazeuten'', published 1921 * ''Lehrbuch der Pharmakognosie''Digital editionpublished 19052nd editionpublished 1910; 3rd edition published 1922 Over the course of his li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cordioideae
Cordioideae is a subfamily of the flowering plant family Boraginaceae. Genera * '' Coldenia'' L. * ''Cordia ''Cordia'' is a genus of flowering plants in the borage family, Boraginaceae. It contains 228 species of shrubs and trees, that are found in tropical and subtropical regions worldwide. Many of the species are commonly called manjack, while may ...'' L. * '' Saccellium'' Humb. & Bonpl. References Asterid subfamilies {{Boraginaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coldenia
''Coldenia'', named after C. Colden, is a monotypic genus of flowering plants traditionally included in the borage family, Boraginaceae ''sensu lato''. It was assigned to the subfamily Ehretioideae, but molecular data revealed it to be more closely related to the genus ''Cordia'', so that other authors placed in Cordioideae. Subsequently, it was placed in its own family, Coldeniaceae, within the Boraginales order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ..., by the Boraginales Working Group. The sole species is ''Coldenia procumbens''. References Bibliography * Cordioideae Monotypic Boraginales genera Boraginaceae genera {{Boraginaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach to taxonomy adopted by most biological fields. The common ancestor may be an individual, a population, or a species (extinct or Extant taxon, extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed ''monophyletic'' (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming Taxon, taxa that are not clades; that is, taxa that are not Monophyly, monophyletic. Some of the relationships between organisms that the molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resampling (statistics)
In statistics, resampling is the creation of new samples based on one observed sample. Resampling methods are: # Permutation tests (also re-randomization tests) for generating counterfactual samples # Bootstrapping # Cross validation # Jackknife Permutation tests Permutation tests rely on resampling the original data assuming the null hypothesis. Based on the resampled data it can be concluded how likely the original data is to occur under the null hypothesis. Bootstrap Bootstrapping is a statistical method for estimating the sampling distribution of an estimator by sampling with replacement from the original sample, most often with the purpose of deriving robust estimates of standard errors and confidence intervals of a population parameter like a mean, median, proportion, odds ratio, correlation coefficient or regression coefficient. It has been called the plug-in principle,Logan, J. David and Wolesensky, Willian R. Mathematical methods in biology. Pure and Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast DNA
Chloroplast DNA (cpDNA), also known as plastid DNA (ptDNA) is the DNA located in chloroplasts, which are photosynthetic organelles located within the cells of some eukaryotic organisms. Chloroplasts, like other types of plastid, contain a genome separate from that in the cell nucleus. The existence of chloroplast DNA was identified biochemically in 1959, and confirmed by electron microscopy in 1962. The discoveries that the chloroplast contains ribosomes and performs protein synthesis revealed that the chloroplast is genetically semi-autonomous. The first complete chloroplast genome sequences were published in 1986, ''Nicotiana tabacum'' (tobacco) by Sugiura and colleagues and '' Marchantia polymorpha'' (liverwort) by Ozeki et al. Since then, tens of thousands of chloroplast genomes from various species have been sequenced. Molecular structure Chloroplast DNAs are circular, and are typically 120,000–170,000 base pairs long. They can have a contour length of around 30–60 mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetics
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 phylogenetics, 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 (biology), 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 tre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ehretioideae
Ehretioideae is a subfamily of the flowering plant family Boraginaceae. Genera * '' Bourreria'' P.Browne * '' Cortesia'' Cav. * '' Ehretia'' P.Browne * '' Halgania'' Gaudich. * ''Ixorhea'' Fenzl * '' Lepidocordia'' Ducke * '' Menais'' Loefl. * '' Patagonula'' L. * ''Rochefortia'' Sw. * '' Rotula'' Lour. * ''Tiquilia'' Pers. Christiaan Hendrik Persoon (31 December 1761 – 16 November 1836) was a Cape Colony mycologist who is recognized as one of the founders of mycological taxonomy. Early life Persoon was born in Cape Colony at the Cape of Good Hope, the thi ... References Asterid subfamilies {{boraginaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
