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Acis Longifolia
''Acis longifolia'' is a species of flowering plant in the family Amaryllidaceae, endemic to Corsica. Its white flowers appear in spring. It is sometimes cultivated as an ornamental plant, but is not fully frost-hardy. Description ''Acis longifolia'' resembles '' Acis trichophylla'', but is smaller. The thin leaves are longer than the flowering stem. The flowers, which appear in spring, are borne in groups of usually two to four, each on a slender pedicel (stalk) up to 25 mm long. The flowers are 8–11 mm long, with tepals lacking points at the end and styles shorter than the stamens. There are two spathes, longer than the pedicels. Taxonomy ''Acis longifolia'' was first described in 1847 in a work by Max Roemer, who attributed the name to Jaques Gay. In 1855, Jean Grenier transferred the species to '' Leucojum''. In 2004, it was transferred back to '' Acis'', along with other species of ''Leucojum'', on the basis of a molecular phylogenetic study. Distribution a ... [...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] |
Max Joseph Roemer
Max Joseph Roemer (1791–1849) was a German botanist who worked in Weimar. Roemer served as ''Landrichter'' (country judge) in the Bavarian town of Aub before working as a private scientist in Würzburg. and is the taxonomic authority of the genera ''Heteromeles'', ''Pyracantha ''Pyracantha'' (from Greek "fire" and "thorn", hence firethorn) is a genus of large, thorny evergreen shrubs in the family Rosaceae, with common names firethorn or pyracantha. They are native to an area extending from Southwest Europe east to ...'', and '' Erythrocarpus'' as well as numerous plant species. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Botanic Gardens, Kew
Royal Botanic Gardens, Kew is a non-departmental public body in the United Kingdom sponsored by the Department for Environment, Food and Rural Affairs. An internationally important botanical research and education institution, it employs 1,100 staff. Its board of trustees is chaired by Dame Amelia Fawcett. The organisation manages botanic gardens at Kew in Richmond upon Thames in south-west London, and at Wakehurst, a National Trust property in Sussex which is home to the internationally important Millennium Seed Bank, whose scientists work with partner organisations in more than 95 countries. Kew, jointly with the Forestry Commission, founded Bedgebury National Pinetum in Kent in 1923, specialising in growing conifers. In 1994, the Castle Howard Arboretum Trust, which runs the Yorkshire Arboretum, was formed as a partnership between Kew and the Castle Howard Estate. In 2019, the organisation had 2,316,699 public visitors at Kew, and 312,813 at Wakehurst. Its site at Kew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Checklist Of Selected Plant Families
The World Checklist of Selected Plant Families (usually abbreviated to WCSP) is an "international collaborative programme that provides the latest peer reviewed and published opinions on the accepted scientific names and synonyms of selected plant families." Maintained by the Royal Botanic Gardens, Kew, it is available online, allowing searches for the names of families, genera and species, as well as the ability to create checklists. The project traces its history to work done in the 1990s by Kew researcher Rafaël Govaerts on a checklist of the genus ''Quercus''. Influenced by the Global Strategy for Plant Conservation, the project expanded. , 173 families of seed plants were included. Coverage of monocotyledon families is complete; other families are being added. There is a complementary project called the International Plant Names Index (IPNI), in which Kew is also involved. The IPNI aims to provide details of publication and does not aim to determine which are accepted spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulb Frame
In agriculture and gardening, a cold frame is a transparent-roofed enclosure, built low to the ground, used to protect plants from adverse weather, primarily excessive cold or wet. The transparent top admits sunlight and prevents heat escape via convection that would otherwise occur, particularly at night. Essentially, a cold frame functions as a miniature greenhouse to extend the growing season. Historically, cold frames were built to be used in addition to a heated greenhouse. The name itself exemplifies the distinction between the warm greenhouse and the unheated cold frame. They were frequently built as part of the greenhouse's foundation brickwork along the southern wall (in northern latitudes). This allowed seeds to be germinated in the greenhouse and then easily moved to the attached cold frame to be "hardened-off" before final planting outside. Cold frames are similar to some enclosed hotbeds, also called hotboxes. The difference is in the amount of heat generated inside. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpine House
A greenhouse (also called a glasshouse, or, if with sufficient heating, a hothouse) is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown.These structures range in size from small sheds to industrial-sized buildings. A miniature greenhouse is known as a cold frame. The interior of a greenhouse exposed to sunlight becomes significantly warmer than the external temperature, protecting its contents in cold weather. Many commercial glass greenhouses or hothouses are high tech production facilities for vegetables, flowers or fruits. The glass greenhouses are filled with equipment including screening installations, heating, cooling, and lighting, and may be controlled by a computer to optimize conditions for plant growth. Different techniques are then used to manage growing conditions, including air temperature, relative humidity and vapour-pressure deficit, in order to provide the opti ... [...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 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 frame ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acis (plant)
''Acis '' is a genus of perennial, herbaceous and bulbous plants in the amaryllis family (Amaryllidaceae, subfamily Amaryllidoideae). The genus consists of nine species distributed in Europe and Northern Africa. ''Acis'' was previously included in '' Leucojum''; both genera are known as snowflakes. Description ''Acis'' species are perennial bulbous plants. The flowers have six equally sized tepals, unlike the related genus ''Galanthus'' (snowdrops) in which the inner three tepals are shorter than the outer three. The tepals are unmarked, differing in this respect from '' Leucojum''. Most species have white tepals, although those of '' Acis rosea'' are pale pink. ''Acis'' species are relatively short, up to in '' Acis autumnalis'' and in ''Acis tingitana''. The leaves are narrow; very narrow (filiform) in '' Acis trichophylla''. The flower stalks (scapes) are solid. Taxonomy ''Acis'' was first differentiated from the genus '' Leucojum'' by Richard Anthony Salisbury in ''The P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucojum
''Leucojum'' is a small genus of bulbous plants native to Eurasia belonging to the Amaryllis family, subfamily Amaryllidoideae. As currently circumscribed, the genus includes only two known species, most former species having been moved into the genus '' Acis''. Both genera are known as snowflakes. ''Leucojum'' is a compound of Greek λευκος, ''leukos'' "white" and ἰόν, ''ion'' "violet". The spelling ''Leucoium'' is also used. Other common names include snowbell, dewdrop, and St. Agnes' flower. Description Until 2004, the genus ''Leucojum'' was treated as including species now placed in ''Acis''. ''Leucojum'' when narrowly circumscribed consists of only two species, '' Leucojum aestivum'' and '' Leucojum vernum''. Compared to ''Acis'', ''Leucojum'' has hollow rather than solid flower stalks ( scapes), white flowers with green or yellow marks on both the inner and outer three tepals, flower stems (pedicels) at least as long as the spathes enclosing the inflorescence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Charles Marie Grenier
Jean Charles Marie Grenier (1808–1875) was a French botanist and naturalist who was a professor to the Faculty of Sciences at Besançon. In 1836 he received his doctorate in medicine, followed by his degree in sciences in 1844. At Besançon, he taught classes in natural history, zoology and botany, being appointed doyen of the school in 1869. Journal 1823-1833 by Charles Weiss, Suzanne Lepin Grenier is credited with the description of hundreds of botanical species, many of them in collaboration with (1807–1880), a professor of natural history at [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jaques Étienne Gay
Jaques Étienne Gay (1786 in Switzerland – 1864) was a Swiss-French botanist, civil servant, collector and taxonomist. His name is associated with plants in standardised botanical nomenclature, e.g. ''Crocus sieberi'' J.Gay. He was the most famous of the students of botanist Jean François Aimée Gaudin with whom he began collecting plants at the age of 14. He was married to Rosalie Nillion. The botanical genus '' Gaya'' was named in his honour, as well as the genus '' Neogaya'' belonging to the family Apiaceae. Also the species '' Potamogeton gayi'' in 1892. Publications * Gay, Jacques Etienne. 1857. Recherches sur les caractères de la végétation du fraisier et sur la distribution géographique de ses espèces, avec la description de deux nouvelles. ''Annales des Sciences Naturelles (Botanique)'' 4th ser. 8: 185–208 * Gay, Jacques Etienne. 1821. ''Monographie des cinq genres de plantes que comprend la tribu des Lasiopetalées dans la famille des Buttneriacées.'' R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spathe
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate and ebracteolate, without bracts. Variants Some bracts are brightly-coloured and serve the function of attracting pollinators, either together with the perianth or instead of it. Examples of this type of bract include those of ''Euphorbia pulcherrima'' (poinsettia) and ''Bougainvillea'': both of these have large colourful bracts surrounding much smaller, less colourful flowers. In grasses, each floret (flower) is enclosed in a pair of papery bracts, called the lemma (lower bract) and pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
