|
Ziziphus Mistol
''Ziziphus mistol'' or mistol is a spiniferous tree of the family Rhamnaceae, that belongs to genus '' Ziziphus'', natural (and very abundant) of certain areas of Gran Chaco, South America. The word "mistol" derives from colonial era Spanish, from the word "mixture" (mezcla) since it was believed that mistol was a hybrid between species of genus Schinopsis because of the likely color of its wood to Spaniard colonists' perception. Morphology The ''mistol'' varies greatly in height, it may reach 10 to 15 meters though most individuals have no more than 4 to 9 meters high. Trunk diameter is also variable, it ranges 20 to 60 centimeters. The branches are pubescent, abundant, with spines near the leaves, and arranged in zig-zag. Its foliage is semi-deciduous. Mistol leaves are oval shaped, alternate, entire, with three prominent basal veins, 2–7 cm long and slightly petiolated. It flowers late in spring, from October to December and fructifies from November to marc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Heinrich Rudolf Grisebach
August Heinrich Rudolf Grisebach () was a German botanist and phytogeographer. He was born in Hannover on 17 April 1814 and died in Göttingen on 9 May 1879. Biography Grisebach studied at the Lyceum in Hanover, the cloister-school at Ilfeld, and the University of Göttingen. He graduated in medicine from the University of Berlin in 1836. He undertook expeditions to Provence, Turkey, the Balkans, and Norway. In 1837 he became associate professor and in 1847 full professor at the medical faculty in Göttingen and was named director of the botanical garden there in 1875. While his main fields of interest were phytogeography and systematics, especially the Gentianaceae and Malpighiaceae, he considered his ''Flora of the British West Indian Islands'' his most important work. Much of his collection, especially the types of species described by him, are housed at the Göttingen University Herbarium. His taxonomic classification is set out in his ''Grundriss der systematischen Botani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diaguita
The Diaguita people are a group of South American indigenous people native to the Chilean Norte Chico and the Argentine Northwest. Western or Chilean Diaguitas lived mainly in the Transverse Valleys which incised in a semi-arid environment. Eastern or Argentine Diaguitas lived in the provinces of La Rioja and Catamarca and part of the provinces of Salta, San Juan and Tucumán. The term ''Diaguita'' was first applied to peoples and archaeological cultures by Ricardo E. Latcham in the early 20th century. Ancient Diaguitas were not a unified people; the language or dialects used by them seems to have varied from valley to other valleys and they were politically fragmented into several chiefdoms. Coastal and inland Chilean Diaguitas traded, as evidenced by the archaeological findings of mollusc shells in the upper courses of Andean valleys. According to the 2010 census there are 67,410 self-identified Diaguita descendants in Argentina. In Chile, Diaguitas are the third-most po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drought-tolerant Trees
Drought tolerance is the ability to which a plant maintains its biomass production during arid or drought conditions. Some plants are naturally adapted to dry conditions'','' surviving with protection mechanisms such as desiccation tolerance, detoxification, or repair of xylem embolism. Other plants, specifically crops like corn, wheat, and rice, have become increasingly tolerant to drought with new varieties created via genetic engineering. The plants behind drought tolerance are complex and involve many pathways which allows plants to respond to specific sets of conditions at any given time. Some of these interactions include stomatal conductance, carotenoid degradation and anthocyanin accumulation, the intervention of osmoprotectants (such as sucrose, glycine, and proline), ROS-scavenging enzymes. The molecular control of drought tolerance is also very complex and is influenced other factors such as environment and the developmental stage of the plant. This control consists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Argentina
The Environment of Argentina is characterised by high biodiversity. Biodiversity Subtropical plants dominate the Gran Chaco in the north, with the ''Dalbergia'' genus of trees well represented by Brazilian rosewood and the quebracho tree; also predominant the wacho white and black algarrobo trees ('' Prosopis alba'' and ''Prosopis nigra''). Savannah-like areas exist in the drier regions nearer the Andes. Aquatic plants thrive in the wetlands of Argentina. In central Argentina the ''humid pampas'' are a true tallgrass prairie ecosystem. The original pampa had virtually no trees; some imported species like the American sycamore or eucalyptus are present along roads or in towns and country estates (''estancias''). The only tree-like plant native to the pampa is the evergreen Ombú. The surface soils of the pampa are a deep black color, primarily mollisols, known commonly as ''humus''. This makes the region one of the most agriculturally productive on Earth; however, this is also res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Bolivia
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of Argentina
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caffeine
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. It is mainly used recreationally as a cognitive enhancer, increasing alertness and attentional performance. Caffeine acts by blocking binding of adenosine to the adenosine A1 receptor, which enhances release of the neurotransmitter acetylcholine. Caffeine has a three-dimensional structure similar to that of adenosine, which allows it to bind and block its receptors. Caffeine also increases cyclic AMP levels through nonselective inhibition of phosphodiesterase. Caffeine is a bitter, white crystalline purine, a methylxanthine alkaloid, and is chemically related to the adenine and guanine bases of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). It is found in the seeds, fruits, nuts, or leaves of a number of plants native to Africa, East Asia and South America, and helps to protect them against herbivores and from competition by preventing the germination of nearby seeds, as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrope
Grape syrup is a condiment made with concentrated grape juice. It is thick and sweet because of its high ratio of sugar to water. Grape syrup is made by boiling grapes, removing their skins, squeezing them through a sieve to extract the juice, and adding sugar. Like other fruit syrups, a common use of grape syrup is as a topping to sweet cakes, such as pancakes or waffles. Names and etymology The ancient Greek name for grape syrup is siraios (σιραίος), in the general category of hepsema (ἕψημα), which translates to 'boiled'. The Greek name was used in Crete and, in modern times, in Cyprus. ''Petimezi'' is the name for a type of Mediterranean grape syrup. The word comes from the Turkish ''pekmez'', which usually refers to grape syrup, but is also used to refer to mulberry and other fruit syrups. Vincotto (not to be confused with vino cotto) is the southern Italian term for grape syrup. It is made only from cooked wine grape must (mosto cotto), with no fermentatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quilmes (tribe)
The Quilmes people, also known as ''Kilmes'', were an indigenous tribe of the Diaguita group settled in the western subandean valleys of today’s Tucumán province, in northwestern Argentina. They fiercely resisted the Inca invasions of the 15th century, and continued to resist the Spaniards for 130 years, until being defeated in 1667. Spanish invaders relocated the last 2,000 survivors to a reservation (''reducción'') 20 km south of Buenos Aires. This 1,500 km journey was made by foot, causing hundreds of Quilmes to die in the process. By 1810, the reservation was abandoned as a result of its having become a ghost town. The survivors ultimately settled in what is now the city of Quilmes. The Quilmes Indians were one of the fiercest cultures which resisted the Incas but eventually fell to the Spaniards. Today, there are only a few Quilmes left in Tucumán Province. Quilmes ruins On the way to Cafayate, 182 km from San Miguel de Tucumán, the Ruins of Quilmes may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comechingón
Comechingón (plural Comechingones) is the common name for a group of people indigenous to the Argentina, Argentine Provinces of Argentina, provinces of Córdoba Province (Argentina), Córdoba and San Luis Province, San Luis. They were thoroughly displaced or exterminated by the Spanish colonization of the Americas, Spanish conquistadores by the end of the 17th century. The two main Comechingón groups called themselves Henia (in the north) and Kamiare (in the south), each subdivided into a dozen or so tribes. The name ''comechingón'' is a deformation of the pejorative term ''kamichingan''—"cave dwellers"—used by the Sanavirón tribe. They were sedentary, practiced agriculture yet gathered wild fruits, and raised animals for wool, meat and eggs. Their culture was heavily influenced by that of the Andes. Several aspects seem to differentiate the Henia-Kamiare from inhabitants of nearby areas. They had a rather Caucasian appearance, with beards and supposedly a minority with g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ziziphus Mistol Griseb1
''Ziziphus'' is a genus of about 40 species of spiny shrubs and small trees in the buckthorn family, Rhamnaceae, distributed in the warm-temperate, subtropical and tropical regions of the world. The leaves are alternate, entire, with three prominent basal veins, and long; some species are deciduous, others evergreen. The flowers are small, inconspicuous yellow-green. The fruit is an edible drupe, yellow-brown, red, or black, globose or oblong, long, often very sweet and sugary, reminiscent of a date in texture and flavour. Etymology The generic name is derived via classical Latin from Hellenistic Greek, where it is presumed to have been borrowed from another language, perhaps from ''zizfum'' or ''zizafun'', the Persian word for '' Z. lotus''. Ecology ''Ziziphus'' species are used as food plants by the larvae of some Lepidoptera species including ''Bucculatrix zizyphella'', which feeds exclusively on the genus, and ''Endoclita malabaricus''. Well known species includes ''Ziz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigenous Peoples In South America
The Indigenous peoples of South America or South American Indigenous peoples, are the pre-Colombian peoples of South America and their descendants. These peoples contrast with South Americans of European ancestry and those of African descent. In Spanish, Indigenous people are often referred to as ''indígenas'' or ''pueblos indígenas'' (lit. Indigenous peoples). They may also be called ''pueblos nativos'' or ''nativos'' (lit. Native peoples). The term ''aborigen'' (lit. aborigine) is used in Argentina and ''pueblos aborígenes'' (lit. aboriginal peoples) is commonly used in Colombia. The English term "Amerindian" (short for "Indians of the Americas") is often used in the Guianas. Latin Americans of mixed European and Indigenous descent are usually referred to as mestizos (Spanish) and mestiços (Portuguese). While those of mixed African and Indigenous ancestry are referred to as zambos. It is believed that the first human populations of South America either arrived from Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
