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Josias Braun-Blanquet
Josias Braun-Blanquet (3 August 1884 – 20 September 1980) was an influential phytosociologist and botanist. Braun-Blanquet was born in Chur, Switzerland, and died in Montpellier, France. Biography In Josias Braun-Blanquet's dissertation, supervised by Charles Flahault, he worked on the phytosociology of the southern Cévennes. Between 1918 and 1938 he edited the exsiccata ''Flora Rhaetica exsiccata'' distributing plant specimens with detailed information on their habitat and ecological demands. Subsequently he established the modern way of classifying vegetation according to floristic composition. This is what makes him one of the most influential botanists until today. Braun-Blanquet's way of classifying a plant community uses the scientific name of its most characteristic species as namesake, changing the ending of the generic name to "-etum" and treating the specific epithet as adjective. Thus, a particular type of mesotrophic grassland widespread in western Europe and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
False Oat-grass
''Arrhenatherum elatius'' is a species of flowering plant in the grass family Poaceae, commonly known as false oat-grass, and also bulbous oat grass (subsp. ''bulbosum''), tall oat-grass, tall meadow oat, onion couch and tuber oat-grass. It is native throughout Europe (including Iceland), and also western and southwestern Asia (south to Jordan and Iran), and northwestern Africa (Morocco to Tunisia). This tufted grass is sometimes used as an ornamental grass and is sometimes marketed as " cat grass". Outside of its native range it can be found elsewhere as an introduced species. It is found especially in prairies, at the side of roads and in uncultivated fields. The bulbous subspecies can be a weed of arable land. It is palatable grass for livestock and is used both as forage (pasture) and fodder (hay and silage). Description This coarse grass can grow to tall.Streeter D, Hart-Davies C, Hardcastle A, Cole F, Harper L. 2009. ''Collins Flower Guide''. Harper Collins The leaves a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linnean Medal
The Linnean Medal of the Linnean Society of London was established in 1888, and is awarded annually to alternately a botanist or a zoologist or (as has been common since 1958) to one of each in the same year. The medal was of gold until 1976, and is for the preceding years often referred to as "the Gold Medal of the Linnean Society", not to be confused with the official Linnean Gold Medal which is seldom awarded. The engraver of the medal was Charles Anderson Ferrier of Dundee, a Fellow of the Linnean Society from 1882. On the obverse of the medal is the head of Linnaeus in profile and the words "Carolus Linnaeus", on the reverse are the arms of the society and the legend ''"Societas Linnaeana optime merenti"''; an oval space is reserved for the recipient's name.Gage A.T. and Stearn W.T. (1988) ''A Bicentenary History of the Linnean Society of London'', Linnean Society of London, p. 80 Linnean medallists 19th century *1888: Sir Joseph D. Hooker and Sir Richard Owen *1889: Alp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizophora Mangle
''Rhizophora mangle'', also known as the red mangrove, is a salt-tolerant, small-to-medium sized evergreen tree restricted to coastal, estuarine ecosystems along the southern portions of North America, the Caribbean as well as Central America and tropical West Africa. Its viviparous "seeds", in actuality called propagules, become fully mature plants before dropping off the parent tree. These are dispersed by water until eventually embedding in the shallows. ''Rhizophora mangle'' grows on aerial prop roots, which arch above the water level, giving stands of this tree the characteristic "mangrove" appearance. It is a valuable plant in Florida, Louisiana, and Texas coastal ecosystems. The name refers to the red colour on the inner part of its roots when halved, so it does not display any red colour in its regular appearance. In its native habitat it is threatened by invasive species such as the Brazilian pepper tree ''(Schinus terebinthifolius)''. The red mangrove itself is co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterocarpus Officinalis
''Pterocarpus officinalis'', the dragonsblood tree, is a species of flowering plant in the family Fabaceae, native to southern Mexico, Central America, the Caribbean, and northern South America. It is typically found in coastal freshwater or slightly brackish habitats, in association with mangroves that occupy the more saline areas. Its timber is commercially traded. References Pterocarpus, officinalis Flora of Southwestern Mexico Flora of Veracruz Flora of Southeastern Mexico Flora of Central America Flora of the Caribbean Flora of northern South America Flora of Ecuador Flora of Colombia Flora of North Brazil Flora of Northeast Brazil Plants described in 1763 Flora without expected TNC conservation status {{Dalbergieae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrubland
Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominance (ecology), dominated by shrubs, often also including grasses, herbaceous plant, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity. It may be the mature vegetation type in a particular region and remain stable over time, or it may be a transitional community that occurs temporarily as the result of a disturbance, such as fire. A stable state may be maintained by regular natural disturbance such as fire or browsing (predation), browsing. Shrubland may be unsuitable for human habitation because of the danger of fire. The term was coined in 1903. Shrubland species generally show a wide range of adaptations to fire, such as heavy seed production, lignotubers, and fire-induced germination. Botanical structural form In botany and ecology a shrub is defined as a much-branched woody plant less than 8 m high, usually with many plant stem, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical
The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's axial tilt; the width of the tropics (in latitude) is twice the tilt. The tropics are also referred to as the tropical zone and the torrid zone (see geographical zone). Due to the overhead sun, the tropics receive the most solar energy over the course of the year, and consequently have the highest temperatures on the planet. Even when not directly overhead, the sun is still close to overhead throughout the year, therefore the tropics also have the lowest seasonal variation on the planet; "winter" and "summer" lose their temperature contrast. Instead, seasons are more commonly divided by precipitation variations than by temperature variations. The tropics maintain wide diversity of local climates, such as rain forests, monsoons, sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centaureo-Cynosuretum Cristati
British NVC community MG5 (''Cynosurus cristatus - Centaurea nigra'' grassland) is one of the mesotrophic grassland communities in the British National Vegetation Classification system. It is one of four such communities associated with well-drained permanent pastures and meadows. This community is widely distributed community though common only in certain regions. There are three subcommunities. This type of plant community was described in 1952 as Centaureo-Cynosuretum cristati Br.-Bl. & Tx.. Community composition The following constant species are found in this community: * Common Bent (''Agrostis capillaris'') * Sweet Vernal-grass (''Anthoxanthum odoratum'') * Black Knapweed (''Centaurea nigra'') * Crested Dog's-tail (''Cynosurus cristatus'') * Cock's-foot (''Dactylis glomerata'') * Red Fescue (''Festuca rubra'') * Yorkshire-fog (''Holcus lanatus'') * Common Bird's-foot Trefoil (''Lotus corniculatus'') * Ribwort Plantain (''Plantago lanceolata'') * Red Clover (''Trifol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crested Dog's-tail
''Cynosurus cristatus'', the crested dog's-tail, is a short-lived perennial grass in the family Poaceae, characterised by a seed head that is flat on one side. It typically grows in species rich grassland. It thrives in a variety of soil types but avoids the acid and calcareous extremes of pH, and prefers well drained soils. retrieved 10 December 2010. It may be grown as an ornamental plant. Description 
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Centaurea Nigra
''Centaurea nigra'' is a species of flowering plant in the family Asteraceae, and is also known as lesser knapweed, common knapweed, black knapweed and bell weed. It is native to central Europe, and has been introduced to temperate North America and Australasia, where it is usually regarded as a noxious weed due to its fast spread, hardiness and competitive potential. Description ''Centaurea nigra'' is an upright herbaceous perennial growing up to c. 1 m (3.3 ft) in height. It produces spreading rhizomes. ''C. nigra'' initially produces a basal rosette of leaves, which are usually entire and up to 30 cm long (11.8 in). Once the rosette is fully formed, it produces upright stems before eventually dying away. These upright stems turn purple when mature. The leaves on these stems are smaller, 1-8 mm x 2-10 mm, usually entire, grey-green and roughly hairy. The inflorescence is globe-shaped, 10-20 mm x 30-40 mm, and contains small purple to reddish flowers that are fringed by black ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
