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Amomyrtus
''Amomyrtus'' is a genus of flowering plants in the myrtle family, Myrtaceae described as a genus in 1948. It is native to temperate southern South America, where it is distributed in Chile and Argentina.Arroyo, M. T. K. and A. M. Humaña. (1999)Breeding systems of two endemic rainforest species in southern Chile: ''Amomyrtus meli'' (Phil.) Legr. et Kaus. (Myrtaceae) and ''Luzuriaga polyphylla'' (Hook.) Macbr. (Philesiaceae). Guyana Bot 56(1) 31-37. These plants produce large, white flowers with abundant pollen and fleshy black fruits containing one to three seeds. The plants are self-compatible Self-incompatibility (SI) is a general name for several genetic mechanisms that prevent self-fertilization in sexually reproducing organisms, and thus encourage outcrossing and allogamy. It is contrasted with separation of sexes among individuals .... Species Species References Myrtaceae Myrtaceae genera Flora of South America Taxa named by Max Burret {{Myrtaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amomyrtus Luma
''Amomyrtus luma'', known as luma, is a species of tree in the family Myrtaceae. It is native to Chile and Argentina. It grows from Colchagua to Aysen (34 to 45°S). This species occurs in rainforests, near streams, and in other moist sites. Description Luma is an evergreen tree that measures up to 25 m (80 ft) tall and up to 50 cm (25 in) in diameter, with smooth bark, decorticant, reddish to brown. The leaves are opposite, in an oval to oblong shape, with an acute apex that ends in a pointed end up to 1 mm long. The petioles are hairy, 2–4 mm long. New shoots are hairy, which distinguishes it from Amomyrtus meli, a species that it strongly resembles. The flowers are hermaphroditic, with 5 fused sepals and 5 free white petals about 4 mm long. The stamens are numerous (30-45) and 4–5 mm long. The fruit is a black to purplish-black berry when mature, 1-1.5 cm in diameter, generally with 3 seeds, about 3-4.5 mm. Uses The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amomyrtus Meli 3
''Amomyrtus'' is a genus of flowering plants in the myrtle family, Myrtaceae described as a genus in 1948. It is native to temperate southern South America, where it is distributed in Chile and Argentina.Arroyo, M. T. K. and A. M. Humaña. (1999)Breeding systems of two endemic rainforest species in southern Chile: ''Amomyrtus meli'' (Phil.) Legr. et Kaus. (Myrtaceae) and ''Luzuriaga polyphylla'' (Hook.) Macbr. (Philesiaceae). Guyana Bot 56(1) 31-37. These plants produce large, white flowers with abundant pollen and fleshy black fruits containing one to three seeds. The plants are self-compatible Self-incompatibility (SI) is a general name for several genetic mechanisms that prevent self-fertilization in sexually reproducing organisms, and thus encourage outcrossing and allogamy. It is contrasted with separation of sexes among individuals .... Species Species References Myrtaceae Myrtaceae genera Flora of South America Taxa named by Max Burret {{Myrtaceae-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amomyrtus Meli
''Amomyrtus meli'', known as meli, is a species of tree endemic to Chile in the family Myrtaceae. It grows from Arauco to Chiloe (37 to 42°S). It grows mostly on moist and shaded sites. Description It is an evergreen tree or that measures up to 20 m (65 ft) tall and up to 60 cm (23 in) in diameter, smooth bark, decorticant, reddish-whitish color. The leaves are opposite, oval, lanceolate or elliptical with acute apex which ends in a mucro up to 1 mm long. The leaves are 2-5 long and 0.7-2.5 cm wide, the petioles are 2–4 mm long. Newly shoots are glabrous what make it different from Amomyrtus luma, species to which it resembles very much, The flowers are hermaphrodite, 5 fused sepals and 5 free white petals about 3–4 mm long. The stamens are numerous 40-80 and 5–7 mm long. The fruit is a black purplish-black berry, 5–8 mm in diameter, generally with 3 seeds about 3–4.5 mm. Etymology The name Amomyrtus from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrtaceae Genera
Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtus, Myrtle, Metrosideros, pōhutukawa, Pimenta racemosa, bay rum tree, clove, guava, Acca (plant), acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaf, leaves are evergreen, alternate to mostly opposite, simple, and usually entire (i.e., without a toothed margin). The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous. Evolutionary history Scientists hypothesize that the family Myrtaceae arose between 60 and 56 million years ago (Mya) during the Paleocene era. Pollen fossils have been sourced to the ancient supercontinent Gondwana. The breakup of Gondwana during the Cretaceous period (145 to 66 Mya) geographically isol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrtaceae
Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire (i.e., without a toothed margin). The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous. Evolutionary history Scientists hypothesize that the family Myrtaceae arose between 60 and 56 million years ago (Mya) during the Paleocene era. Pollen fossils have been sourced to the ancient supercontinent Gondwana. The breakup of Gondwana during the Cretaceous period (145 to 66 Mya) geographically isolated disjunct taxa and allowed for rapid speciation; i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainforest
Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainforest, but other types have been described. Estimates vary from 40% to 75% of all biotic species being indigenous to the rainforests. There may be many millions of species of plants, insects and microorganisms still undiscovered in tropical rainforests. Tropical rainforests have been called the "jewels of the Earth" and the " world's largest pharmacy", because over one quarter of natural medicines have been discovered there. Rainforests as well as endemic rainforest species are rapidly disappearing due to deforestation, the resulting habitat loss and pollution of the atmosphere. Definition Rainforest are characterized by a closed and continuous tree canopy, high humidity, the presence of moisture-dependent vegetation, a moist layer of lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead. Some definitions state that a shrub is less than and a tree is over 6 m. Others use as the cut-off point for classification. Many species of tree may not reach this mature height because of hostile less than ideal growing conditions, and resemble a shrub-sized plant. However, such species have the potential to grow taller under the ideal growing conditions for that plant. In terms of longevity, most shrubs fit in a class between perennials and trees; some may only last about five y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollen
Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte. Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the anth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-incompatibility In Plants
Self-incompatibility (SI) is a general name for several genetic mechanisms that prevent self-fertilization Autogamy, or self-fertilization, refers to the fusion of two gametes that come from one individual. Autogamy is predominantly observed in the form of self-pollination, a reproductive mechanism employed by many flowering plants. However, species o ... in sexual reproduction, sexually reproducing organisms, and thus encourage outcrossing and allogamy. It is contrasted with separation of sexes among individuals (dioecy), and their various modes of spatial (herkogamy) and temporally (dichogamy) separation. SI is best-studied and particularly common in flowering plants, although it is present in other groups, including ascidians, sea squirts and fungi. In plants with SI, when a pollen grain produced in a plant reaches a stigma of the same plant or another plant with a matching allele or genotype, the process of pollen germination, pollen-tube growth, ovule fertilization, or embry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Burret
Karl Ewald Maximilian Burret, commonly known as Max Burret (6 June 1883 – 19 September 1964) was a German botanist. Burret was born in Saffig near Andernach in the Kingdom of Prussia, Prussian Rhine Province. He originally studied law at Lausanne and Munich at the instigation of his father. Burret had a greater interest in natural science than in law, and he eventually abandoned his law studies to conduct botany, botanical research in Berlin, where he earned a Ph.D in 1909 for his Taxonomy (biology), Taxonomic thesis, and quickly became one of Germany's most prominent botanists. Burret participated in many botanical science organizations in Germany, taking up leadership positions, such as Assistant at the Berlin Botanical Museum and Garden from 1909 to 1911, as well as Botanical Assistant and Lecturer at the Botanical Institute of the Agricultural College in Berlin in 1911 through 1921. In 1922 he was appointed Custodian of the Botanical Museum and Garden in Berlin, and la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica. The earliest recorded human prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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