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Verbena Tweedieana
''Verbena'' (), also known as vervain or verveine, is a genus in the family Verbenaceae. It contains about 150 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia; however, '' Verbena officinalis'', the common vervain or common verbena, is the type species and native to Europe. Naming In English, the name ''Verbena'' is usually used in the United States and the United Kingdom, whereas elsewhere the terms ''verveine'' or ''vervain'' are in use. When used alone, the terms usually refer to common verbena. Description Verbena is an herbaceous flowering plant, belonging to the Verbenaceae family, and may be annual or perennial depending on the species. The leaves are usually opposite, simple, and in many species hairy, often densely so. The flowers are small, with five petals, and borne in dense spikes. Typically some shade of blue, they may also be white, pink, or purple, especially in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verbena Bonariensis
:''This is about the ''Verbena bonariensis'' described by Linnaeus. See also below for a common misapplication of this taxon.'' ''Verbena bonariensis'', the purpletop vervain, clustertop vervain, Argentinian vervain, tall verbena or pretty verbena, is a member of the verbena family cultivated as a flowering annual or herbaceous perennial plant. In USA horticulture, it is also known by the ambiguous names purpletop (also used for the grass ''Tridens flavus'') and South American vervain (which can mean any of the numerous species in the genus ''Verbena'' occurring in that continent). For the misapplication "Brazilian verbena" see below. It is native to tropical South America where it grows throughout most of the warm regions, from Colombia and Brazil to Argentina and Chile. Description ''Verbena bonariensis'' is a tall and slender-stemmed perennial. It can grow to 6 ft (180 cm) tall and can spread to 3 ft (90 cm) wide. At maturity, it will develop a woody base. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyploid
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verbena Bonariensis2
''Verbena'' (), also known as vervain or verveine, is a genus in the family Verbenaceae. It contains about 150 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia; however, ''Verbena officinalis'', the common vervain or common verbena, is the type species and native to Europe. Naming In English, the name ''Verbena'' is usually used in the United States and the United Kingdom, whereas elsewhere the terms ''verveine'' or ''vervain'' are in use. When used alone, the terms usually refer to common verbena. Description Verbena is an herbaceous flowering plant, belonging to the Verbenaceae family, and may be annual or perennial depending on the species. The leaves are usually opposite, simple, and in many species hairy, often densely so. The flowers are small, with five petals, and borne in dense spikes. Typically some shade of blue, they may also be white, pink, or purple, especially in cultivars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetics And Evolution
''Molecular Phylogenetics and Evolution'' is a peer-reviewed scientific journal of evolutionary biology and phylogenetics. The journal is edited by E.A. Zimmer. Indexing The journal is indexed in: *EMBiology *Journal Citation Reports *Scopus Scopus is Elsevier's abstract and citation database launched in 2004. Scopus covers nearly 36,377 titles (22,794 active titles and 13,583 inactive titles) from approximately 11,678 publishers, of which 34,346 are peer-reviewed journals in top-l ... * Web of Science External links * Elsevier academic journals Evolutionary biology journals Phylogenetics Molecular biology Publications established in 1992 Monthly journals {{biology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computational Phylogenetics
Computational phylogenetics is the application of computational algorithms, methods, and programs to phylogenetic"origin,_source,_birth")_is_the_study_of_the_evolutionary_his_... "origin, source, birth") is the study of the evolutionary his ... "origin, source, birth") is the study of the evolutionary his ... "origin, source, birth") is the study of the evolutionary his ... "origin, source, birth") is the study of the evolutionary his ... "tribe, clan, race", and wikt:γενετικός, γενετικός [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glandularia Bipinnatifida
''Glandularia bipinnatifida'', commonly called Dakota mock vervain, prairie verbena, and Moradilla, among others, is a species of flowering plant in the verbena family (Verbenaceae). It is native to the North America, where its natural range extends from the United States south to Nicaragua. In the United States, it is found primarily in the Great Plains and in the Blackland Prairies of the Southeast. Elsewhere in North America, it is occasionally found as a non-persisting waif. Its natural habitat is in open grassy areas, including prairies. It can be found in both high-quality natural communities and in disturbed areas. ''Glandularia bipinnatifida'' is an herbaceous or semi-woody perennial. It produces pink or purple flowers primarily in the spring, but can bloom anytime throughout the growing season. Its leaves are finely dissected, into segments that are 1–4 mm wide. It can be distinguished from the similar-looking ''Glandularia pulchella'' by its long flower bracts, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verbena Hastata
''Verbena hastata'', commonly known as American vervain, blue vervain, simpler's joy, or swamp verbena, is a perennial flowering plant in the vervain family Verbenaceae. It grows throughout the continental United States and in much of southern Canada. Description ''V. hastata'' grows as a stiffly erect stem, occasionally branching in the upper half, reaching up to tall. The stems are four-angled (square), hairy, and green to reddish in color. Leaves are opposite, simple, and measure up to long and across. They have doubly-serrate margins and a variety of shapes, from lanceolate to ovate, and may have 2 lateral lobes. The inflorescence is a panicle, or group, of flowering spikes, up to long at the end of the upper stems. Each flowering spike in the panicle is up to long, with densely packed, numerous 5-lobed flowers, which measure up to long. The flowers are violet or deep purple, rarely white. They open from the bottom of the spike upward, with only a ring of a few flowe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verbena Orcuttiana
''Verbena'' (), also known as vervain or verveine, is a genus in the family Verbenaceae. It contains about 150 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia; however, ''Verbena officinalis'', the common vervain or common verbena, is the type species and native to Europe. Naming In English, the name ''Verbena'' is usually used in the United States and the United Kingdom, whereas elsewhere the terms ''verveine'' or ''vervain'' are in use. When used alone, the terms usually refer to common verbena. Description Verbena is an herbaceous flowering plant, belonging to the Verbenaceae family, and may be annual or perennial depending on the species. The leaves are usually opposite, simple, and in many species hairy, often densely so. The flowers are small, with five petals, and borne in dense spikes. Typically some shade of blue, they may also be white, pink, or purple, especially in cultivars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene Transfer
Horizontal gene transfer (HGT) or lateral gene transfer (LGT) is the movement of genetic material between unicellular and/or multicellular organisms other than by the ("vertical") transmission of DNA from parent to offspring ( reproduction). HGT is an important factor in the evolution of many organisms. HGT is influencing scientific understanding of higher order evolution while more significantly shifting perspectives on bacterial evolution. Horizontal gene transfer is the primary mechanism for the spread of antibiotic resistance in bacteria, and plays an important role in the evolution of bacteria that can degrade novel compounds such as human-created pesticides and in the evolution, maintenance, and transmission of virulence. It often involves temperate bacteriophages and plasmids. Genes responsible for antibiotic resistance in one species of bacteria can be transferred to another species of bacteria through various mechanisms of HGT such as transformation, transduction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in the cells. The ATP and NADPH is then used to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. A chloroplast is characterized by its two membranes and a high concentration of chlorophyll. Other plastid types, such as the leucoplast and the chromoplast, contain little chlorophyll and do not carry out photosynthesis. Chloroplasts are highly dynamic—they circulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hickenia
''Hickenia'' is the name of two genera of flowering plants, both named after Dr Cristóbal María Hicken: * ''Hickenia'' Lillo, a genus of Apocynaceae containing one species now reclassified as ''Morrenia scalae'' (Hicken) GoyderKew Bulletin 56: 162 (2001) * ''Hickenia'' Britton & Rose, a genus of Cactaceae which included species now classified as ''Parodia ''Parodia'' is a genus of flowering plants in the family Cactaceae, native to the eastern slopes of the Andes in northwestern Argentina and southwestern Bolivia and in the lowland pampas regions of northeastern Argentina, southern Brazil, eastern ...'' The second of these, having been published in Britton and Rose's ''Cactaceae'' (1922) is an illegitimate homonym of the former, which was published three years earlier in ''Physis'' (Buenos Aires) 4: 422. References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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