|
Forsskaolea Tenacissima
''Forsskaolea tenacissima'' is a member of the non-stinging nettles genus ''Forsskaolea'' and is in the same family as the stinging kind, Urticaceae. Described as "looking like a tough character that does not want or need a caress", ''F. tenacissima'' makes its home where not many plant species survive, in stony soils, road edges, in the gravel wadi and "in the rock crevices and water-receiving depressions" above the stone pavements of the Hamadas. ''Forsskaolea tenacissima'' was named in mourning of a student of Carl Linnaeus, a Swede named Peter Forsskål, who died while gathering botanical and zoological specimens from the Arabia Felix. Linnaeus named this plant ''Forsskaolea tenacissima'' because the plant was as stubborn and persistent as the student had been. Description The almost upright fleshy, stiff-haired, woody annual ''F. tenacissima'' appears after the rains in rocky and difficult to grow in places like the Sahel of Mauritania, and Northeast Africa (the Horn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Níjar
Níjar () is a Spanish municipality in the province of Almería, Andalusia. It lies in the eastern part of Almería, in the Sierra de Alhamilla and the south-eastern Mediterranean coast, in the Campo de Níjar, near the Cabo de Gata-Níjar Natural Park. Níjar covers an area of 599.8 square kilometres, making it one of the most extended municipalities of Spain. Its population of 17,824 (2002) is mainly concentrated in the cities of Campohermoso Campohermoso () is a town and municipality in the Colombian Department of Boyacá, part of the subregion of the Lengupá Province. Climate Campohermoso has a tropical monsoon climate (Köppen Köppen is a German surname. Notable people with th ..., San Isidro, and Níjar. The main sources of income are agriculture, especially in the growing of greenhouse crops, and tourism, especially the watersports centre of San José. Demographics References External links * *Níjar- Diputación Provincial de Almería Municipaliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horn Of Africa
The Horn of Africa (HoA), also known as the Somali Peninsula, is a large peninsula and geopolitical region in East Africa.Robert Stock, ''Africa South of the Sahara, Second Edition: A Geographical Interpretation'', (The Guilford Press; 2004), p. 26 Located on the easternmost part of the African mainland, it is the fourth largest peninsula in the world. It is composed of Ethiopia, Eritrea, Somalia and Djibouti; broader definitions also include parts or all of Kenya, Sudan, South Sudan, and Uganda. The term Greater Horn Region (GHR) can additionally include Burundi, Rwanda, and Tanzania. It lies along the southern boundary of the Red Sea and extends hundreds of kilometres into the Guardafui Channel, Gulf of Aden, and Indian Ocean and shares a maritime border with the Arabian Peninsula of Western Asia. Names This peninsula has been known by various names. Ancient Greeks and Romans referred to it as Regio Aromatica or Regio Cinnamonifora due to the aromatic plants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enneapogon Desvauxii
''Enneapogon desvauxii'' is a species of grass known by the common name nineawn pappusgrass. This is a short perennial bunchgrass native to the southwestern United States, northern Mexico, parts of South America, and occurs throughout arid parts of Africa. It is known less often on other continents. Description ''Enneapogon desvauxi'' grows erect stems 10 to 40 centimeters tall. It has a few hairy, thready leaves and fluffy gray inflorescence An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...s. Each spike is 3 to 6 centimeters long and contains fertile florets which form the fruit grain, each with nine spreading awns with white hairs. References External linksJepson Manual Treatment — ''Enneapogon desvauxi'' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anastatica Hierochuntica
''Anastatica'' is a monotypic genus of plants in the family ''Brassicaceae'' containing the single species ''Anastatica hierochuntica''. The plant is a small gray annual herb that rarely grows above high, and bears minute white flowers. It is a tumbleweed page 359 pages 36-37 pages 204-205 capable of hygroscopic expansion and retraction. However, it is not a true resurrection plant, because the plant's dead tissues do not revive and turn green. This species is not to be confused with '' Selaginella lepidophylla'', also sometimes referred to as "rose of Jericho", or "false rose of Jericho", which is a true resurrection plant that can revive from a dried state and regain the processes of respiration and photosynthesis. Names Common names include Maryam's flower, flower of St Mary, St. Mary's flower, Mary's flower, white mustard flower , and rose of Jericho. Range ''Anastatica'' is found in arid areas in the Middle East and the Sahara Desert, including parts of North Africa and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lotononis Platycarpa
''Leobordea platycarpa'' is a common annual plant in the drier parts of the African continent found in open ground, roadsides, cultivated ground and other disturbed places or in short grassland on sand. Distribution Recorded growing at altitudes of to ''L. playcarpa'' makes its home in open ground, roadsides, cultivated ground and other disturbed places or in short grassland on sand. ;Native : Palearctic: ::Macaronesia: Cape Verde ::Northern Africa: Algeria, Egypt, Libya, Morocco :Afrotropic: ::Northeast Tropical Africa: Chad, Djibouti, Ethiopia, Sudan ::East Tropical Africa: Kenya, Tanzania, Uganda ::West-Central Tropical Africa: Central African Republic, Zaire ::South Tropical Africa: Angola, Zimbabwe ::Southern Africa: Botswana, Namibia, South Africa - Cape Province, Free State, Transvaal ::Western Indian Ocean: Mauritius ::Arabian Peninsula: Oman, Qatar, Saudi Arabia, Yemen ::Western Asia: Iran, Israel, Syria :Indomalaya: ::Indian Subcontinent: Pakistan Pakis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerva Javanica
''Aerva javanica'', the kapok bush or desert cotton, is a species of plant in the family Amaranthaceae. It has a native distribution incorporating much of Africa (including Madagascar), and the south-west and south of Asia, and it has become adventitious in northern Australia. Description The plant is herbaceous, multi-stemmed and soft-wooded and bears broad leaves; it often has an erect habit and grows to a height of about . In Western Australia it tends to grow in sandy soils especially along drainage lines. It flowers between January and October. Diplospory, a type of Agamospermy, occurs during the development of female gametophyte in the ovule and hence reduction division does not take place in the Megaspore mother cell. The diploid egg is unfertilized and forms the embryo. Hence daughter plants are exactly clones of the mother. The species uses carbon fixation. It is dioecious, meaning male and female flowers are produced on separate individuals. Uses This herb is de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia Tortilis
''Vachellia tortilis'', widely known as ''Acacia tortilis'' but now attributed to the genus '' Vachellia'', is the umbrella thorn acacia, also known as ''umbrella thorn'' and Israeli babool, a medium to large canopied tree native to most of Africa, primarily to the savanna and Sahel of Africa (especially the Somali peninsula and Sudan), but also occurring in the Middle East. Distribution and growing conditions ''Vachellia tortilis'' is widespread in Africa, being found in countries like Tunisa, Morocco, Uganda, Angola, Zimbabwe, Djibouti, and Botswana. It tends to grow in areas where temperatures vary from and rainfall is anywhere from about per year. Characteristics In extremely arid conditions, it may occur as a small, wiry bush. It grows up to in height. The tree carries leaves that grow to approx. in length with between 4 and 10 pair of pinnae each with up to 15 pairs of leaflets. Flowers are small and white, highly aromatic, and occur in tight clusters. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tabernas Desert
The Tabernas Desert ( es, Desierto de Tabernas) is one of Spain's semi-arid deserts, located within Spain's south-eastern province of Almería. It is in the interior, about north of the provincial capital Almería, in the Tabernas municipality in Andalusia. Due to its high elevation and inland location, it has slightly higher annual rainfall (more than per year) and lower annual average temperature than coastal areas of Almeria. A nature reserve (protected area), it spans . Climate The Tabernas Desert is defined mainly by a cold semi-arid climate and a cold desert climate. Situated between the Sierra de los Filabres to the north and the Sierra de Alhamilla to the south-southeast, it is isolated from the humid winds of the Mediterranean Sea, in an area with little rainfall known as Levante. In the lowest elevations of the Tabernas basin (about above sea level), the average annual temperature is close to . Due to its relative proximity to the coast and its relatively hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadis
Wadi ( ar, وَادِي, wādī), alternatively ''wād'' ( ar, وَاد), North African Arabic Oued, is the Arabic term traditionally referring to a valley. In some instances, it may refer to a wet (ephemeral) riverbed that contains water only when heavy rain occurs. Etymology The term ' is very widely found in Arabic toponyms. Some Spanish toponyms are derived from Andalusian Arabic where ' was used to mean a permanent river, for example: Guadalcanal from ''wādī al-qanāl'' ( ar, وَادِي الْقَنَال, "river of refreshment stalls"), Guadalajara from ''wādī al-ḥijārah'' ( ar, وَادِي الْحِجَارَة, "river of stones"), or Guadalquivir, from ''al-wādī al-kabīr'' ( ar, اَلْوَادِي الْكَبِير, "the great river"). General morphology and processes Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of alluvial fans and extend to inland sabkhas or dry lakes. In basi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Ecology
Population ecology is a sub-field of ecology that deals with the dynamics of species populations and how these populations interact with the environment, such as birth and death rates, and by immigration and emigration. The discipline is important in conservation biology, especially in the development of population viability analysis which makes it possible to predict the long-term probability of a species persisting in a given patch of habitat. Although population ecology is a subfield of biology, it provides interesting problems for mathematicians and statisticians who work in population dynamics. History In the 1940s ecology was divided into autecology—the study of individual species in relation to the environment—and synecology—the study of groups of species in relation to the environment. The term autecology (from Ancient Greek: αὐτο, ''aúto'', "self"; οίκος, ''oíkos'', "household"; and λόγος, ''lógos'', "knowledge"), refers to roughly the same ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytosociology
Phytosociology, also known as phytocoenology or simply plant sociology, is the study of groups of species of plant that are usually found together. Phytosociology aims to empirically describe the vegetative environment of a given territory. A specific community of plants is considered a social unit, the product of definite conditions, present and past, and can exist only when such conditions are met. In phyto-sociology, such a unit is known as a phytocoenosis (or phytocoenose). A phytocoenosis is more commonly known as a plant community, and consists of the sum of all plants in a given area. It is a subset of a biocoenosis, which consists of all organisms in a given area. More strictly speaking, a phytocoenosis is a set of plants in area that are interacting with each other through competition or other ecological processes. Coenoses are not equivalent to ecosystems, which consist of organisms and the physical environment that they interact with. A phytocoensis has a distribution wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achene
An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not open at maturity). Achenes contain a single seed that nearly fills the pericarp, but does not adhere to it. In many species, what is called the "seed" is an achene, a fruit containing the seed. The seed-like appearance is owed to the hardening of the fruit wall (pericarp), which encloses the solitary seed so closely as to seem like a seed coat. Examples The fruits of buttercup, buckwheat, caraway, quinoa, amaranth, and cannabis are typical achenes. The achenes of the strawberry are sometimes mistaken for seeds. The strawberry is an accessory fruit with an aggregate of achenes on its outer surface, and what is eaten is accessory tissue. A rose produces an aggregate of achene fruits that are encompassed within an expanded hypanthium ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Horn Of Africa")
