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Hevea Tree
''Hevea'' is a genus of flowering plants in the spurge family, Euphorbiaceae, with about ten members. It is also one of many names used commercially for the wood of the most economically important rubber tree, '' H. brasiliensis''. The genus is native to tropical South America but is widely cultivated in other tropical countries and naturalized in several of them. It was first described in 1775. Characteristics French botanist and explorer Jean Baptiste Christophore Fusée Aublet first described ''Hevea'' as a genus in 1775. ''H. brasiliensis'' and ''H. guianensis'' are large trees, often reaching more than in height. Most of the other members of the genus are small to medium trees, and ''H. camporum'' is a shrub of around . Trees in this genus are either deciduous or evergreen. Certain species, namely ''H. benthamiana'', ''H. brasiliensis'' and ''H. microphylla'', bear "winter shoots", stubby side shoots with short internodes, scale leaves on the stem and larger leaves near the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Brasiliensis
''Hevea brasiliensis'', the Pará rubber tree, ''sharinga'' tree, seringueira, or most commonly, rubber tree or rubber plant, is a flowering plant belonging to the spurge family Euphorbiaceae Euphorbiaceae, the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of a genus in the family. Most spurges, such as '' Euphorbia paralias'', are herbs, but some, ... originally native to the Amazon basin, but is now pantropical in distribution due to introductions. It is the most economically important member of the genus ''Hevea'' because the milky latex extracted from the tree is the primary source of natural rubber. Description ''H. brasiliensis'' is a tall deciduous tree growing to a height of up to in the wild, but cultivated trees are usually much smaller because drawing off the latex restricts the growth of the tree. The trunk is cylindrical and may have a swollen, bottle-shaped base. The bark is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Pauciflora
''Hevea pauciflora'' is a species of rubber tree in the genus ''Hevea'', belonging to the family Euphorbiaceae. It is native to the rainforests of Venezuela, the Guyanas, northern Brazil, Colombia and Peru. It grows on slopes and high river banks where it is not seasonally inundated. ''H. pauciflora'' is a small evergreen tree growing to a height of about . The specific epithet ''pauciflora'' is Latin for 'few-flowered'.D. Gledhill It is sometimes tapped for rubber production but the latex is low in quality, being mixed with much resin In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on n .... This tree has been used in breeding programmes, for example in Malaysia, to increase the disease resistance and improve the growth qualities of '' Hevea brasiliensis''. References {{Taxonbar, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euphorbiaceae Genera
Euphorbiaceae, the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of a genus in the family. Most spurges, such as ''Euphorbia paralias'', are herbs, but some, especially in the tropics, are shrubs or trees, such as ''Hevea brasiliensis''. Some, such as ''Euphorbia canariensis'', are succulent and resemble cacti because of convergent evolution. This family has a cosmopolitan global distribution. The greatest diversity of species is in the tropics, however, the Euphorbiaceae also have many species in nontropical areas of all continents except Antarctica. Description The leaves are alternate, seldom opposite, with stipules. They are mainly simple, but where compound, are always palmate, never pinnate. Stipules may be reduced to hairs, glands, or spines, or in succulent species are sometimes absent. The plants can be monoecious or dioecious. The radially symmetrical flowers are unisexual, wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaupés Department
Vaupés may refer to: * Vaupés River * Vaupés Department Vaupés may refer to: * Vaupés River Vaupés River (Uaupés River) is a tributary of the Rio Negro in South America. It rises in the Guaviare Department of Colombia, flowing east through Guaviare and Vaupés Departments. It forms part of the int ... of Colombia {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazonas (Brazilian State)
Amazonas () is a state of Brazil, located in the North Region in the northwestern corner of the country. It is the largest Brazilian state by area and the 9th largest country subdivision in the world, and the largest in South America, being greater than the areas of Uruguay, Paraguay, and Chile combined. Mostly located in the Southern Hemisphere, it is the third largest country subdivision in the Southern Hemisphere after the Australian states of Western Australia and Queensland. Entirely in the Western Hemisphere, it is the fourth largest in the Western Hemisphere after Greenland, Nunavut and Alaska. It would be the sixteenth largest country in land area, slightly larger than Mongolia. Neighbouring states are (from the north clockwise) Roraima, Pará, Mato Grosso, Rondônia, and Acre. It also borders the nations of Peru, Colombia and Venezuela. This includes the Departments of Amazonas, Vaupés and GuainÃa in Colombia, as well as the Amazonas state in Venezuela, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pará
Pará is a Federative units of Brazil, state of Brazil, located in northern Brazil and traversed by the lower Amazon River. It borders the Brazilian states of Amapá, Maranhão, Tocantins (state), Tocantins, Mato Grosso, Amazonas (Brazilian state), Amazonas and Roraima. To the northwest are the borders of Guyana and Suriname, to the northeast of Pará is the Atlantic Ocean. The capital and largest city is Belém, which is located at the mouth of the Amazon. The state, which is home to 4.1% of the Brazilian population, is responsible for just 2.2% of the Brazilian GDP. Pará is the most populous state of the North Region, Brazil, North Region, with a population of over 8.6 million, being the ninth-most populous state in Brazil. It is the second-largest state of Brazil in area, at , second only to Amazonas (Brazilian state), Amazonas upriver. Its most famous icons are the Amazon River and the Amazon Rainforest. Pará produces Natural rubber, rubber (extracted from natural rubber tree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marajó
Marajó () is a large coastal island in the state of Pará, Brazil. It is the main and largest of the islands in the Marajó Archipelago. Marajó Island is separated from the mainland by Marajó Bay, Pará River, smaller rivers (especially Macacos and Tajapuru), Companhia River, Jacaré Grande River, Vieira Grande Bay and Atlantic Ocean. From approximately 400 BC to 1600 AD, Marajó was the site of an advanced Pre-Columbian society called the Marajoara culture, which may have numbered more than 100,000 people at its peak. Today, the island is known for its large water buffalo population, as well as the ''pororoca'' tidal bore periodically exhibited by high tides overcoming the usual complex hydrodynamic interactions in the surrounding rivers. It is the second-largest island in South America, and the 35th largest island in the world. With a land area of Marajó is comparable in size to Switzerland. Its maximum span is long and in perpendicular width. Geography Marajà ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Camargoana
''Hevea camargoana'' is a species of flowering plant in the genus ''Hevea'', the rubber trees, belonging to the family Euphorbiaceae. It is native to the island of Marajó in the Amazon delta in northeastern Brazil where it was discovered in 1975. It is a small tree and Its typical habitat is dry savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...h and woodland bordering seasonally inundated swamps. In the wild, this species grows to a height of , but in cultivation it can reach twice this height. Distinguishing features include leaves with pale green undersides, whitish flowers with red bases, toothed basal disks, and single whorls of three to five stamens in the male flowers. The fruits contain three large, rounded seeds. References {{Taxonbar, from=Q30066081 Trees of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes Müller Argoviensis
Johann Müller (9 May 1828 - 28 January 1896) was a Swiss botanist who was a specialist in lichens. He published under the name Johannes Müller Argoviensis to distinguish himself from other naturalists with similar names. Biography Müller was born into a farming family on 9 May 1828 in Teufenthal, Switzerland. He received his education at the Reinach gymnasium and then entered the Aargau industrial school, where he was passionate about botany and mathematics. Encouraged by Hans Schinz he built a herbarium of the flora of Aargau. In 1850 and 1851 he studied in Geneva and came into contact with prominent botanists Edmond Boissier and Alphonse Pyrame de Candolle (who offered him the vacant post of curator at his herbarium). In the spring of 1851 he collected in southern France with Jean Étienne Duby. The herbarium specimens from this trip were later sent to several herbaria in Europe. The following year, Müller travelled with Boissier to collect plants in the Alps of Savoy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Nitida
''Hevea nitida'' is a species of rubber tree in the genus ''Hevea'', belonging to the family Euphorbiaceae. It is a medium-sized evergreen tree up to tall. It is native to the rainforests of northern Brazil and Colombia. Description ''H. nitida'' is a medium-sized, evergreen tree growing to with a slender trunk and branching crown. The exception to this is the variety ''toxicodendroides'', which is a shrubby form only growing to about tall. The leaves have three, drooping, elliptical leaflets, that are folded upwards at the midrib; both upper and lower surfaces are glossy bright green. Male and female flowers are separate and borne in mixed panicles. The calyx lobes have blunt tips and the disks of both male and female flowers are markedly broad, and in the female flowers, lacerated. The fruit capsules are green with reddish tips and usually contain three large, rounded seeds. Distribution and habitat ''H. nitida'' is found in northern Brazil and Colombia. It mostly occurs no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Spruceana
''Hevea spruceana'' is a species of rubber tree in the genus ''Hevea'', belonging to the family Euphorbiaceae. It is native to the rainforests of northern Brazil and Guyana. It is named in honour of the English botanist Richard Spruce who spent the years 1849 to 1864 exploring the Amazon basin and sending botanical specimens back to Europe. Description ''H. spruceana'' is a medium-sized, evergreen tree that sometimes develops a markedly swollen trunk, seemingly a response to periodical flooding. The leaves have three elliptical leaflets. The inflorescence is a panicle with separate male and female flowers; in contrast to other members of the genus, the flowers of ''H. spruceana'' are purplish in colour. The usually three seeds are contained in a capsule with woody valves, but this does not break open explosively to expel the seeds as happens with other members of the genus. Distribution and habitat ''H. spruceana'' is found in the Amazon basin, in a strip bordering the Amazon Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Microphylla
''Hevea microphylla'' is a species of rubber tree in the genus ''Hevea'', belonging to the family Euphorbiaceae. It is native to the Amazon basin where it occurs in Venezuela, Colombia and northern Brazil. It was first described in 1905 by the German botanist Ernst Heinrich Georg Ule. It is the only member of the genus to be included in the subgenus ''Microphyllae''. Description ''H. microphylla'' is a small tree up to tall, with a small, sparse crown and a slender trunk with a swollen, bottle-like base. It bears "winter shoots", stubby side shoots with short internodes, scale leaves on the stem and larger leaves near the tip. These poorly-developed shoots are short-lived, the foliage being shed before new shoots develop; this species shares this feature with '' H. benthamiana'' and '' H. brasiliensis'', the remaining trees in the genus being evergreen. The leaves have three leaflets which are bent back in the bud and are later held in a horizontal or deflexed position. The infl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
