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Acis Fabrei
''Acis fabrei'' is a bulbous flowering plant in the family Amaryllidaceae, native to France. It has white flowers that appear in late spring after the leaves. Although first collected in 1882, it was not scientifically described until 1990. It is now known from only four populations in the Vaucluse department in south-east France, around Mont Ventoux and the River Nesque. It is considered to be a "threatened species". Description ''Acis fabrei'' is a small bulbous perennial plant. Each bulb produces one to four narrow leaves, 2 to 5 mm wide and up to 30 cm long, averaging around 17 cm. The leaves appear before the flowers. Flowering takes place in late spring with the flowers held considerably below the top of leaves. There is usually a single flower to each stem ( peduncle), with six white tepals, 10–11 mm long, carried on a stalk (pedicel) 5–11 mm long. The flower bud is enclosed in a spathe that is divided into two segments. The style is sligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulb
In botany, a bulb is structurally a short stem with fleshy leaves or leaf basesBell, A.D. 1997. ''Plant form: an illustrated guide to flowering plant morphology''. Oxford University Press, Oxford, U.K. that function as food storage organs during dormancy. (In gardening, plants with other kinds of storage organ are also called "ornamental bulbous plants" or just "bulbs".) Description The bulb's leaf bases, also known as scales, generally do not support leaves, but contain food reserves to enable the plant to survive adverse conditions. At the center of the bulb is a vegetative growing point or an unexpanded flowering shoot. The base is formed by a reduced stem, and plant growth occurs from this basal plate. Roots emerge from the underside of the base, and new stems and leaves from the upper side. Tunicate bulbs have dry, membranous outer scales that protect the continuous lamina of fleshy scales. Species in the genera ''Allium'', ''Hippeastrum'', '' Narcissus'', and ''Tulipa' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Henri Fabre
Jean-Henri Casimir Fabre (21 December 1823 – 11 October 1915) was a French naturalist, entomologist, and author known for the lively style of his popular books on the lives of insects. Biography Fabre was born on 21 December 1823 in Saint-Léons in Aveyron, France. Fabre was largely an autodidact, owing to the poverty of his family. Nevertheless, he acquired a primary teaching certificate at the young age of 19 and began teaching in Carpentras whilst pursuing further studies. In 1849, he was appointed to a teaching post in Ajaccio (Corsica), then in 1853 moved on to the lycée in Avignon. Fabre was a popular teacher, physicist, chemist and botanist. However, he is probably best known for his findings in the field of entomology, the study of insects, and is considered by many to be the father of modern entomology. Much of his enduring popularity is due to his marvellous teaching ability and his manner of writing about the lives of insects in biographical form, which he pref ... [...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] |
IUCN Red List
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit. The aim of the IUCN Red List is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to reduce species extinction. According to IUCN the formally stated goals of the Red List are to provi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Pubescens
''Quercus pubescens'', the downy oak or pubescent oak, is a species of white oak (genus ''Quercus'' sect. ''Quercus'') native to southern Europe and southwest Asia, from northern Spain (Pyrenees) east to the Crimea and the Caucasus. It is also found in France and parts of central Europe. Description ''Quercus pubescens'' is a medium-sized deciduous tree growing up to . Forest-grown trees grow tall, while open-growing trees develop a very broad and irregular crown. They are long-lived, to several hundred years, and eventually grow into very stout trees with trunks up to in diameter. Open-grown trees frequently develop several trunks. The Bark (botany), bark is very rough, light gray and divided into small flakes. Large trees develop very thick whitish bark cracked into deep furrows, similar to the pedunculate oak but lighter in colour. The twigs are light purple or whitish, with tomentum. The buds are small () and blunt, light brown. The leaves are leathery usually long (rar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terra Rossa (soil)
Terra rossa (Italian for "red soil") is a well-drained, reddish, clayey to silty soil with neutral pH conditions and is typical of the Mediterranean region. The reddish color of terra rossa is the result of the preferential formation of hematite over goethite. This soil type typically occurs as a discontinuous layer that ranges from a few centimeters to several meters in thickness that covers limestone and dolomite bedrock in karst regions. The high internal drainage and neutral pH conditions of terra rossa are a result of the karstic nature of the underlying limestone and dolomite.Torrent, J., 2005. ''Mediterranean soils.'' In: Hillel, D. (Ed.), ''Encyclopaedia of Soils in the Environment,'' vol. 2. Elsevier Academic Press, Oxford, pp. 418–427.Merino, E., Banerjee, A. and Dworkin, S., 2006. ''Dust, terra rossa, replacement, and karst: serendipitous geodynamics in the critical zone.'' ''Geochimica et Cosmochimica Acta,'' 70(18), p. A416.Vingiani, S., Di Iorio, E., Colombo, C. an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anther
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in '' Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea''). The androecium in var ... [...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] |
Acis Nicaeensis
''Acis nicaeensis'', sometimes called the French snowflake, is a species of flowering plant in the family Amaryllidaceae, native to south-eastern France. A small spring flowering bulb with white flowers, it is cultivated as an ornamental plant. Description ''Acis nicaeensis'' is a bulbous perennial, growing up to 18 cm tall, although often less. It generally has a tufted growth habit, with thin leaves appearing before the flowers. The flowers have white tepals, 8–12 mm long with sharply pointed tips. There is usually only one flower per flowering stem ( peduncle), although there can be up to three. The flower stalks (pedicels) are 10–18 mm long. The style is just longer than the stamens. The six-lobed ovary is disc-shaped. Taxonomy ''Acis nicaeensis'' was first described in 1867 by Honoré Ardoino, as ''Leucojum nicaeensis''. The specific epithet ''nicaeensis'' refers to Nice, in south-east France. In 2004, it was transferred to '' Acis'', along with other sp ... [...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] |
