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Quercus Afares
''Quercus afares'', the African oak, is a species of oak native to Algeria and Tunisia. It has a very limited distribution in the coastal mountains of the eastern Tell Atlas in Algeria, and the Mogod- Kroumerie region of northwestern Tunisia. ''Quercus afares'' is deciduous, with a corky bark (thinner than that of the cork oak, ''Q. suber)'', and can reach 25–30 metres in height. It grows in dense stands, associated with cork oak at elevations as low as 200 metres, and with the semi-deciduous Algerian oak ''(Q. canariensis)'' from 700 to 1600 metres elevation. ''Q. afares'' can also be found in monospecific stands, especially above 1200 metres on soils damaged by fire. It is endemic to the eastern coastal portion of the Mediterranean conifer and mixed forests ecoregion. Taxonomy The relationship of ''Q. afares'' to other oaks was investigated in 2006. It was initially classified in ''Q.'' section ''Cerris'', because of morphological similarities with two other species, Turk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomel
Nicolas Auguste Pomel (20 September 1821 – 2 August 1898) was a French geologist, paleontologist and botanist. He worked as a mines engineer in Algeria and became a specialist in north African vertebrate fossils. He was Senator of Algeria for Oran from 1876 to 1882. Life Nicolas-Auguste Pomel was born in Issoire, Puy-de-Dôme, on 20 September 1821. He studied at the Lycée de Clermont and earned his Licence ès sciences. He was conscripted into the army when he was prepared to enter the École des mines. He became a civil engineer after being released. After the coup d'état of 2 December 1851 his Republican beliefs earned him deportation. He became a ''Garde des mines'' in Oran in 1866, and was promoted to the 1st class in 1872. From 1876 to 1882 he was member of the Senate (Oran division). In 1882 he was tasked with geological mapping of Algeria. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algerian Oak
''Quercus canariensis'', the Algerian oak, Mirbeck's oak or zean oak, is an oak in the section ''Quercus'' sect. ''Mesobalanus'', native to southern Portugal, Spain, Tunisia, Algeria and Morocco. Despite the scientific name, it does not occur naturally today in the Canary Islands, though it may have in the past. Description ''Quercus canariensis'' is a medium-sized deciduous to semi-evergreen tree growing to tall with a trunk up to in diameter. The leaves are long and 6–8 cm broad, with 6–12 pairs of shallow lobes. The flowers are catkins; the fruit is an acorn 2.5 cm long and 2 cm broad, in a shallow cup. The tree is a recipient of the Royal Horticultural Society's Award of Garden Merit. Landmark specimens Grand old Algerian oak tree was planted on 19 May 1863. It resides within the Kyneton Botanical Gardens in the town of Kyneton in the Australian state of Victoria. This tree is listed by the National Trust on the Register of Significant Trees in V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Quercus Species
The genus ''Quercus'' contains about 500 species, some of which are listed here. The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus ''Quercus'' was divided into the two subgenera ''Cyclobalanopsis'', the ring-cupped oaks, and ''Quercus'', which included all the other sections. However, a comprehensive revision in 2017 identified different relationships. Now the genus is commonly divided into a subgenus ''Quercus'' and a sugenus ''Cerris'', with ''Cyclobalanopsis'' included in the latter. The sections of subgenus ''Quercus'' are mostly native to the New World, with the notable exception of the white oaks of sect. ''Quercus'' and the endemic Quercus pontica. In contrast, the sections of the subgenus ''Cerris'' are exclusively native to the Old World. Legend Species with evergreen foliage ("live oaks") are tagged '#'. Species in the genus have been recategorized between deciduous and evergreen on numerous occasions, alt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Castaneifolia
''Quercus castaneifolia'', the chestnut-leaved oak, is a species of oak in the turkey oak section Quercus sect. Cerris, ''Quercus'' sect. ''Cerris''. It is native to the Caucasus and Alborz mountains of Iran, and resembles the closely related Quercus cerris, Turkey Oak in appearance. Description ''Q. castaneifolia'' is a deciduous tree growing up to tall, with a trunk up to in diameter (exceptionally up to 50 m tall with a trunk up to 3.5 m across). The leaves are long and 3–5 cm wide, with 10–15 small, regular triangular lobes on each side. The flowers are wind-pollinated catkins; the fruit is an acorn, maturing about 18 months after pollination, 2–3 cm long and 1.5–2 cm broad, bicoloured with an orange basal half grading to a green-brown tip; the acorn cup is 2 cm deep, densely covered in soft long 'mossy' bristles. The acorns are very bitter, but are eaten by jays and pigeons; squirrels usually only eat them when other f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Cerris
''Quercus cerris'', the Turkey oak or Austrian oak, is an oak native to south-eastern Europe and Asia Minor. It is the type species of ''Quercus'' sect. ''Cerris'', a section of the genus characterised by shoot buds surrounded by soft bristles, bristle-tipped leaf lobes, and acorns that usually mature in 18 months. Description ''Quercus cerris'' is a large deciduous tree growing to tall with a trunk up to in diameter. The bark is dark gray and deeply furrowed. On mature trees, the bark fissures are often streaked orange near the base of the trunk. The glossy leaves are long and 3–5 cm wide, with 6–12 triangular lobes on each side; the regularity of the lobing varies greatly, with some trees having very regular lobes, others much less regular. The flowers are wind-pollinated catkins, maturing about 18 months after pollination; the fruit is a large acorn, long and 2 cm broad, bicoloured with an orange basal half grading to a green-brown tip; the acorn cup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Sect
An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''Lithocarpus'' (stone oaks), as well as in those of unrelated species such as '' Grevillea robusta'' (silky oaks) and the Casuarinaceae (she-oaks). The genus ''Quercus'' is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America has the largest number of oak species, with approximately 160 species in Mexico of which 109 are endemic and about 90 in the United States. The second greatest area of oak diversity is China, with approximately 100 species. Description Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Conifer And Mixed Forests
Mediterranean conifer and mixed forests is an ecoregion, in the temperate coniferous forest biome, which occupies the high mountain ranges of North Africa. The term is also a botanically recognized plant association in the African and Mediterranean literature. Geography The Mediterranean conifer and mixed forests ecoregion consists of a series of enclaves in the coastal Rif Mountains and interior Middle Atlas and High Atlas of Morocco, the eastern Tell Atlas and eastern Saharan Atlas of Algeria, and the Kroumerie and Mogod ranges of Tunisia. The Mediterranean woodlands and forests ecoregion surrounds the Mediterranean conifer and mixed forests at lower elevations. In the High Atlas, the Mediterranean conifer and mixed forests yield to the Mediterranean High Atlas juniper steppe at the highest elevations. Flora The predominant canopy tree in the forests is Atlas cedar (''Cedrus atlantica''). Other conifer trees that grow in this area may include Aleppo pine (''Pinus halap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic (ecology)
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cork Oak
''Quercus suber'', commonly called the cork oak, is a medium-sized, evergreen oak tree in the section ''Quercus'' sect. ''Cerris''. It is the primary source of cork for wine bottle stoppers and other uses, such as cork flooring and as the cores of cricket balls. It is native to southwest Europe and northwest Africa. In the Mediterranean basin the tree is an ancient species with fossil remnants dating back to the Tertiary period. It endures drought and makes little demand on the soil quality and is regarded as a defence against desertification. Cork oak forests are home to a multitude of animal and plant species. Since cork is increasingly being displaced by other materials as a bottle cap, these forests are at risk as part of the cultural landscape and animal species such as the Iberian lynx are threatened with extinction. Description General appearance and bark The cork oak grows as an evergreen tree, reaching an average height of or in rare cases up to 25 m and a tru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algeria
) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , religion = , official_languages = , languages_type = Other languages , languages = Algerian Arabic (Darja) French , ethnic_groups = , demonym = Algerian , government_type = Unitary semi-presidential republic , leader_title1 = President , leader_name1 = Abdelmadjid Tebboune , leader_title2 = Prime Minister , leader_name2 = Aymen Benabderrahmane , leader_title3 = Council President , leader_name3 = Salah Goudjil , leader_title4 = Assembly President , leader_name4 = Ibrahim Boughali , legislature = Parliament , upper_house = Council of the Nation , lower_house ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cork (material)
Cork is an Permeability (earth sciences), impermeable buoyancy, buoyant material, the Cork cambium, phellem layer of bark (botany), bark tissue that is harvested for commercial use primarily from ''Quercus suber'' (the cork oak), which is native to southwest Europe and northwest Africa. Cork is composed of suberin, a hydrophobic substance. Because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products, the most common of which is wine stoppers. The Dehesa (pastoral management), montado landscape of Portugal produces approximately half of the cork harvested annually worldwide, with Corticeira Amorim being the leading company in the industry. Cork was examined microscopically by Robert Hooke, which led to his discovery and naming of the cell (biology), cell. Cork composition varies depending on Geography, geographic origin, climate and soil conditions, Genetics, genetic origin, tree dimensions, age (virgin or reproduction), and gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deciduous
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit. The antonym of ''deciduous'' in the botanical sense is evergreen. Generally, the term "deciduous" means "the dropping of a part that is no longer needed or useful" and the "falling away after its purpose is finished". In plants, it is the result of natural processes. "Deciduous" has a similar meaning when referring to animal parts, such as deciduous antlers in deer, deciduous teeth (baby teeth) in some mammals (including humans); or decidua, the uterine lining that sheds off after birth. Botany In botany and horticulture, deciduous plants, including trees, shrubs and herbaceous perennials, are those that lose all of their leaves for part of the year. This process is called abscissio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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