Asteroideae is a subfamily of the plant family Asteraceae. It contains about 70% of the species of the family, it is made of several tribes, including Astereae, Eupatorieae, Heliantheae and Tageteae. Asteroideae contains. There are 17,200 species within this subfamily. Asteroideae is said to have begun 46-36.5 million years ago. This subfamily is composed of 21 tribes that are broken into 3 supertribes: Senecionodae and Helianthodae. Senecioneae contains about 120 genera and more than 3200 species that are found in more temperate areas. Asterodae contains many economically important plants such as the chrysanthemums, common daisy, the asters; the third super tribe is the Helianthodae, the largest of the three, containing 16 of the 21 tribes. This family will have radiate style heads but some could have discoid or disciform, they contain ray florets that are three lobed and are considered perfect flower implying that it is bisexual. Many contain stigmatic surfaces that are separated by two marginal bands and terminal sterile appendages with sweeping hairs.
The subfamily Asteroideae has many genera within the tribes. The Helianthus tuberosus, Helianthus annuus, Guizotia abyssinica are all used as oil seed crops. Artemisia dracunculus is used for culinary herb and Parthenium argentatum is a rubber source; some of the other genera are used as ornamentals. Callistephus, Cosmos and many others. Since 2004, the 21 tribes have been grouped into three supertribes: Senecionodae Senecioneae Asterodae Anthemideae Astereae Calenduleae Gnaphalieae Helianthodae Athroismeae Bahieae Chaenactideae Coreopsideae Eupatorieae Feddeeae Helenieae Heliantheae Inuleae Madieae Millerieae Neurolaeneae Perityleae Plucheeae Polymnieae Tageteae The dictionary definition of Asteroideae at Wiktionary Media related to Asteroideae at Wikimedia Commons Data related to Asteroideae at Wikispecies
National Herbarium of Victoria
The National Herbarium of Victoria is one of Australia's earliest herbaria, the oldest scientific institution in Victoria. It was established in 1853 by Ferdinand von Mueller, the Government Botanist for Victoria, is situated within the Royal Botanic Gardens, Melbourne; the present building was constructed in 1934 through a donation from philanthropist Sir Macpherson Robertson. It, along with a 1989 extension, houses the entire collection of 1.5 million plant and fungal specimens. The Herbarium's botanic library is an important source for the history of Australian botany, has contributed some 124 volumes to the online digital Biodiversity Heritage Library; the herbarium is a partner in the Australasian Virtual Herbarium project, thereby making all of its collection data available to anyone to use. The herbarium publishes an online key together with descriptions of plants found in Victoria via VicFlora. Over half of the existing collection was acquired by Mueller; the herbarium includes the following collections: Otto Sonder herbarium Fern collections Bryophyte collections Algae collections Lichen collections Fungi collections Botany of the Burke and Wills expedition Muelleria, a peer-reviewed botanical journal published by the Royal Botanic Gardens Melbourne National Herbarium of New South Wales List of Herbaria Australasian Virtual Herbarium Fungimap Australasian Virtual Herbarium Royal Botanic Gardens Victoria VicFlora Flora of Victoria, Royal Botanic Gardens Victoria.
Retrieved 18 May 2018
The Canary Islands is a Spanish archipelago and the southernmost autonomous community of Spain located in the Atlantic Ocean, 100 kilometres west of Morocco at the closest point. The Canary Islands, which are known informally as the Canaries, are among the outermost regions of the European Union proper, it is one of the eight regions with special consideration of historical nationality recognized as such by the Spanish Government. The Canary Islands belong to the African Plate like the Spanish cities of Ceuta and Melilla, the two on the African mainland; the seven main islands are Tenerife, Gran Canaria, Lanzarote, La Palma, La Gomera and El Hierro. The archipelago includes much smaller islands and islets: La Graciosa, Isla de Lobos, Montaña Clara, Roque del Oeste and Roque del Este, it includes a series of adjacent roques. In ancient times, the island chain was referred to as "the Fortunate Isles"; the Canary Islands are the most southerly region of Spain and the largest and most populated archipelago of the Macaronesia region.
The Canary Islands have been considered a bridge between four continents: Africa, North America, South America and Europe. The archipelago's beaches and important natural attractions Maspalomas in Gran Canaria and Teide National Park and Mount Teide in Tenerife, make it a major tourist destination with over 12 million visitors per year Tenerife, Gran Canaria and Lanzarote; the islands have a subtropical climate, with moderately warm winters. The precipitation levels and the level of maritime moderation vary depending on location and elevation. Green areas as well as desert exist on the archipelago. Due to their location above the temperature inversion layer, the high mountains of these islands are ideal for astronomical observation. For this reason, two professional observatories, Teide Observatory on the island of Tenerife and Roque de los Muchachos Observatory on the island of La Palma, have been built on the islands. In 1927, the Province of Canary Islands was split into two provinces; the autonomous community of the Canary Islands was established in 1982.
Its capital is shared by the cities of Santa Cruz de Tenerife and Las Palmas de Gran Canaria, which in turn are the capitals of the provinces of Santa Cruz de Tenerife and Las Palmas. Las Palmas de Gran Canaria has been the largest city in the Canaries since 1768, except for a brief period in the 1910s. Between the 1833 territorial division of Spain and 1927 Santa Cruz de Tenerife was the sole capital of the Canary Islands. In 1927 a decree ordered; the third largest city of the Canary Islands is San Cristóbal de La Laguna on Tenerife. This city is home to the Consejo Consultivo de Canarias, the supreme consultative body of the Canary Islands. During the time of the Spanish Empire, the Canaries were the main stopover for Spanish galleons on their way to the Americas, which came south to catch the prevailing northeasterly trade winds; the name Islas Canarias is derived from the Latin name Canariae Insulae, meaning "Islands of the Dogs", a name, applied only to Gran Canaria. According to the historian Pliny the Elder, the Mauretanian king Juba II named the island Canaria because it contained "vast multitudes of dogs of large size".
Alternatively, it is said that the original inhabitants of the island, used to worship dogs, mummified them and treated dogs as holy animals. The ancient Greeks knew about a people, living far to the west, who are the "dog-headed ones", who worshipped dogs on an island; some hypothesize that the Canary Islands dog-worship and the ancient Egyptian cult of the dog-headed god, Anubis are connected but there is no explanation given as to which one was first. Other theories speculate that the name comes from the Nukkari Berber tribe living in the Moroccan Atlas, named in Roman sources as Canarii, though Pliny again mentions the relation of this term with dogs; the connection to dogs is retained in their depiction on the islands' coat-of-arms. It is considered that the aborigines of Gran Canaria called themselves "Canarios", it is possible that after being conquered, this name was used in plural in Spanish, i.e. as to refer to all of the islands as the Canarii-as. What is certain is that the name of the islands does not derive from the canary bird.
Tenerife is the largest and most populous island of the archipelago. Gran Canaria, with 865,070 inhabitants, is both the Canary Islands' second most populous island, the third most populous one in Spain after Majorca; the island of Fuerteventura is the second largest in the archipelago and located 100 km from the African coast. The islands form the Macaronesia ecoregion with the Azores, Cape Verde and the Savage Isles; the Canary Islands is the largest and most populated archipelago of the Macaronesia region. The archipelago consists of seven large and several smaller islands, all of which are volcanic in origin. According to the position of the islands with respect to the north-east trade winds, the climate can be mild and wet or dry. Several native species form laurisilva forests; as a consequence, the individual islands in the Canary archipelago tend to have distinct microclimates. Those islands such as El Hierro, La Palma and La Gomera lying to the west of the archipelago have a climate, influenced by the m
North Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, it is sometimes defined as stretching from the Atlantic shores of Morocco in the west, to Egypt's Suez Canal and the Red Sea in the east. Others have limited it to top North-Western countries like Algeria and Tunisia, a region, known by the French during colonial times as "Afrique du Nord" and is known by all Arabs as the Maghreb; the most accepted definition includes Algeria, Morocco, Tunisia and Egypt, the 6 countries that shape the top North of the African continent. Meanwhile, "North Africa" when used in the term North Africa and the Middle East refers only to the countries of the Maghreb and Libya. Egypt, being part of the Middle East, is considered separately, due to being both North African and Middle Eastern at the same time. North Africa includes a number of Spanish and Portuguese possessions, Plazas de soberanía, Ceuta and Melilla and the Canary Islands and Madeira.
The countries of North Africa share a common ethnic and linguistic identity, unique to this region. Northwest Africa has been inhabited by Berbers since the beginning of recorded history, while the eastern part of North Africa has been home to the Egyptians. Between the A. D. 600s and 1000s, Arabs from the Middle East swept across the region in a wave of Muslim conquest. These peoples, physically quite similar, formed a single population in many areas, as Berbers and Egyptians merged into Arabic and Muslim culture; this process of Arabization and Islamization has defined the cultural landscape of North Africa since. The distinction between North Africa, the Sahel and the rest of the continent is as follows: Nineteenth century European explorers, attracted by the accounts of Ancient geographers or Arab geographers of the classical period, followed the routes by the nomadic people of the vast "empty" space, they documented the names of the stopping places they discovered or rediscovered, described landscapes, took a few climate measurements and gathered rock samples.
A map began to fill in the white blotch. The Sahara and the Sahel entered the geographic corpus by way of naturalist explorers because aridity is the feature that circumscribes the boundaries of the ecumene; the map details included topographical relief and location of watering holes crucial to long crossings. The Arabic word "Sahel" and "Sahara" made its entry into the vocabulary of geography. Latitudinally, the "slopes" of the arid desert, devoid of continuous human habitation, descend in step-like fashion toward the northern and southern edges of the Mediterranean that opens to Europe and the Sahel that opens to "Trab al Sudan." Longitudinally, a uniform grid divides the central desert shrinks back toward the Atlantic Ocean and the Red Sea. The Sahara-Sahel is further divided into a total of twenty sub-areas: central, southern, eastern, etc. In this way, "standard" geography has determined aridity to be the boundary of the ecumene, it identifies settlements based on visible activity without regard for social or political organizations of space in vast, purportedly “empty” areas.
It gives only cursory acknowledgement to what makes Saharan geography, for that matter, world geography unique: mobility and the routes by which it flows. The Sahel or "African Transition Zone" has been affected by many formative epochs in North African history ranging from Ottoman occupation to the Arab-Berber control of the Andalus; as a result, many modern African nation-states that are included in the Sahel evidence cultural similarities and historical overlap with their North African neighbours. In the present day, North Africa is associated with West Asia in the realm of geopolitics to form a Middle East-North Africa region; the Islamic influence in the area is significant and North Africa is a major part of the Muslim world. Some researchers have postulated that North Africa rather than East Africa served as the exit point for the modern humans who first trekked out of the continent in the Out of Africa migration. North Africa has three main geographic features: the Sahara desert in the south, the Atlas Mountains in the west, the Nile River and delta in the east.
The Atlas Mountains extend across much of northern Algeria and Tunisia. These mountains are part of the fold mountain system that runs through much of Southern Europe, they recede to the south and east, becoming a steppe landscape before meeting the Sahara desert, which covers more than 75 percent of the region. The tallest peaks are in the High Atlas range in south-central Morocco, which has many snow-capped peaks. South of the Atlas Mountains is the dry and barren expanse of the Sahara desert, the largest sand desert in the world. In places the desert is cut by irregular watercourses called wadis—streams that flow only after rainfalls but are dry; the Sahara's major landforms include large seas of sand that sometimes form into huge dunes. The Sahara covers the southern part of Algeria and Tunisia, most of Libya. Only two regions of Libya are outside the desert: Tripolitania in the northwest and Cyrenaica in the northeast. Most of Egypt is desert, with the exception of the Nile River and the irrigated land along its banks.
The Nile Valley forms a narrow fertile thread. Sheltered valleys in the Atlas Mountains, the Nile Valley and Delta, the Mediterranean coast are the main sources of fertile farming land. A wide variety of valuable crops including ce
Europe is a continent located in the Northern Hemisphere and in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west and the Mediterranean Sea to the south, it comprises the westernmost part of Eurasia. Since around 1850, Europe is most considered to be separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas and the waterways of the Turkish Straits. Although the term "continent" implies physical geography, the land border is somewhat arbitrary and has been redefined several times since its first conception in classical antiquity; the division of Eurasia into two continents reflects East-West cultural and ethnic differences which vary on a spectrum rather than with a sharp dividing line. The geographic border does not follow political boundaries, with Turkey and Kazakhstan being transcontinental countries. A strict application of the Caucasus Mountains boundary places two comparatively small countries and Georgia, in both continents.
Europe covers 2 % of the Earth's surface. Politically, Europe is divided into about fifty sovereign states of which the Russian Federation is the largest and most populous, spanning 39% of the continent and comprising 15% of its population. Europe had a total population of about 741 million as of 2016; the European climate is affected by warm Atlantic currents that temper winters and summers on much of the continent at latitudes along which the climate in Asia and North America is severe. Further from the sea, seasonal differences are more noticeable than close to the coast. Europe, in particular ancient Greece, was the birthplace of Western civilization; the fall of the Western Roman Empire in 476 AD and the subsequent Migration Period marked the end of ancient history and the beginning of the Middle Ages. Renaissance humanism, exploration and science led to the modern era. Since the Age of Discovery started by Portugal and Spain, Europe played a predominant role in global affairs. Between the 16th and 20th centuries, European powers controlled at various times the Americas all of Africa and Oceania and the majority of Asia.
The Age of Enlightenment, the subsequent French Revolution and the Napoleonic Wars shaped the continent culturally and economically from the end of the 17th century until the first half of the 19th century. The Industrial Revolution, which began in Great Britain at the end of the 18th century, gave rise to radical economic and social change in Western Europe and the wider world. Both world wars took place for the most part in Europe, contributing to a decline in Western European dominance in world affairs by the mid-20th century as the Soviet Union and the United States took prominence. During the Cold War, Europe was divided along the Iron Curtain between NATO in the West and the Warsaw Pact in the East, until the revolutions of 1989 and fall of the Berlin Wall. In 1949 the Council of Europe was founded, following a speech by Sir Winston Churchill, with the idea of unifying Europe to achieve common goals, it includes all European states except for Belarus and Vatican City. Further European integration by some states led to the formation of the European Union, a separate political entity that lies between a confederation and a federation.
The EU originated in Western Europe but has been expanding eastward since the fall of the Soviet Union in 1991. The currency of most countries of the European Union, the euro, is the most used among Europeans. In classical Greek mythology, Europa was a Phoenician princess; the word Europe is derived from her name. The name contains the elements εὐρύς, "wide, broad" and ὤψ "eye, countenance", hence their composite Eurṓpē would mean "wide-gazing" or "broad of aspect". Broad has been an epithet of Earth herself in the reconstructed Proto-Indo-European religion and the poetry devoted to it. There have been attempts to connect Eurṓpē to a Semitic term for "west", this being either Akkadian erebu meaning "to go down, set" or Phoenician'ereb "evening, west", at the origin of Arabic Maghreb and Hebrew ma'arav. Michael A. Barry, professor in Princeton University's Near Eastern Studies Department, finds the mention of the word Ereb on an Assyrian stele with the meaning of "night, sunset", in opposition to Asu " sunrise", i.e. Asia.
The same naming motive according to "cartographic convention" appears in Greek Ἀνατολή. Martin Litchfield West stated that "phonologically, the match between Europa's name and any form of the Semitic word is poor." Next to these hypotheses there is a Proto-Indo-European root *h1regʷos, meaning "darkness", which produced Greek Erebus. Most major world languages use words derived from Europa to refer to the continent. Chinese, for example, uses the word Ōuzhōu. In some Turkic languages the Persian name Frangistan is used casually in referring to much of Europe, besides official names such as Avrupa or Evropa; the prevalent definition of Europe as a geographical term has been in use since the mid-19th century. Europe is taken to be bounded by large bodies of water
Asterales is an order of dicotyledonous flowering plants that includes the large family Asteraceae known for composite flowers made of florets, ten families related to the Asteraceae. The order is a cosmopolite, includes herbaceous species, although a small number of trees and shrubs are present. Asterales are organisms. Asterales share characteristics on biochemical levels. Synapomorphies include the presence in the plants of oligosaccharide inulin, a nutrient storage molecule used instead of starch; the stamens are found around the style, either aggregated densely or fused into a tube an adaptation in association with the plunger pollination, common among the families of the order, wherein pollen is collected and stored on the length of the pistil. The name and order Asterales is botanically venerable, dating back to at least 1926 in the Hutchinson system of plant taxonomy when it contained only five families, of which only two are retained in the APG III classification. Under the Cronquist system of taxonomic classification of flowering plants, Asteraceae was the only family in the group, but newer systems have expanded it to 11.
In the classification system of Dahlgren the Asterales were in the superorder Asteriflorae. The order Asterales includes 11 families, the largest of which are the Asteraceae, with about 25,000 species, the Campanulaceae, with about 2,000 species; the remaining families count together for less than 1500 species. The two large families are cosmopolitan, with many of their species found in the Northern Hemisphere, the smaller families are confined to Australia and the adjacent areas, or sometimes South America. Only the Asteraceae have composite flower heads; the phylogenetic tree according to APG III for the Campanulid clade is as below. The core Asterales are Stylidiaceae, APA clade, MGCA clade, Asteraceae. Other Asterales are Rousseaceae and Pentaphragmataceae. All Asterales families are represented in the Southern Hemisphere. Although most extant species of Asteraceae are herbaceous, the examination of the basal members in the family suggests that the common ancestor of the family was an arborescent plant, a tree or shrub adapted to dry conditions, radiating from South America.
Less can be said about the Asterales themselves with certainty, although since several families in Asterales contain trees, the ancestral member is most to have been a tree or shrub. Because all clades are represented in the southern hemisphere but many not in the northern hemisphere, it is natural to conjecture that there is a common southern origin to them. Asterales are angiosperms; the Asterales order originated in the Cretaceous on the supercontinent Gondwana which broke up from 184 – 80 Mya, forming the area, now Australia, South America, Africa and Antarctica. Asterales contain about 14% of eudicot diversity. From an analysis of relationships and diversities within the Asterales and with their superorders, estimates of the age of the beginning of the Asterales have been made, which range from 116 Mya to 82Mya; however few fossils have been found, of the Menyanthaceae-Asteraceae clade in the Oligocene, about 29 Mya. Fossil evidence of the Asterales is rare and belongs to rather recent epochs, so the precise estimation of the order's age is quite difficult.
An Oligocene pollen is known for Asteraceae and Goodeniaceae, seeds from Oligocene and Miocene are known for Menyanthaceae and Campanulaceae respectively. The Asterales, by dint of being a super-set of the family Asteraceae, include some species grown for food, including the sunflower and chicory. Many are used as spices and traditional medicines. Asterales have many known uses. For example, pyrethrum is a natural insecticide with minimal environmental impact. Wormwood, derived from a genus that includes the sagebrush, is used as a source of flavoring for absinthe, a bitter classical liquor of European origin. W. S. Judd, C. S. Campbell, E. A. Kellogg, P. F. Stevens, M. J. Donoghue. Plant Systematics: A Phylogenetic Approach, 2nd edition. Pp. 476–486. Sinauer Associates, Massachusetts. ISBN 0-87893-403-0. J. Lindley. Nixus Plantarum, 20. Londini. Smissen, R. D.. Asterales. In: Nature Encyclopedia of Life Sciences. Nature Publishing Group, London. "Asterales -- Britannica Online Encyclopedia." Encyclopedia - Britannica Online Encyclopedia.
Web. 19 Jan. 2012. <http://www.britannica.com/EBchecked/topic/39703/Asterales>. "Asterales - Definition and More from the Free Merriam-Webster Dictionary." Dictionary and Thesaur
Plants are multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. Plants were treated as one of two kingdoms including all living things that were not animals, all algae and fungi were treated as plants. However, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes. By one definition, plants form the clade Viridiplantae, a group that includes the flowering plants and other gymnosperms and their allies, liverworts and the green algae, but excludes the red and brown algae. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria, their chloroplasts contain b, which gives them their green color. Some plants are parasitic or mycotrophic and have lost the ability to produce normal amounts of chlorophyll or to photosynthesize. Plants are characterized by sexual reproduction and alternation of generations, although asexual reproduction is common.
There are about 320 thousand species of plants, of which the great majority, some 260–290 thousand, are seed plants. Green plants provide a substantial proportion of the world's molecular oxygen and are the basis of most of Earth's ecosystems on land. Plants that produce grain and vegetables form humankind's basic foods, have been domesticated for millennia. Plants have many cultural and other uses, as ornaments, building materials, writing material and, in great variety, they have been the source of medicines and psychoactive drugs; the scientific study of plants is known as a branch of biology. All living things were traditionally placed into one of two groups and animals; this classification may date from Aristotle, who made the distincton between plants, which do not move, animals, which are mobile to catch their food. Much when Linnaeus created the basis of the modern system of scientific classification, these two groups became the kingdoms Vegetabilia and Animalia. Since it has become clear that the plant kingdom as defined included several unrelated groups, the fungi and several groups of algae were removed to new kingdoms.
However, these organisms are still considered plants in popular contexts. The term "plant" implies the possession of the following traits multicellularity, possession of cell walls containing cellulose and the ability to carry out photosynthesis with primary chloroplasts; when the name Plantae or plant is applied to a specific group of organisms or taxon, it refers to one of four concepts. From least to most inclusive, these four groupings are: Another way of looking at the relationships between the different groups that have been called "plants" is through a cladogram, which shows their evolutionary relationships; these are not yet settled, but one accepted relationship between the three groups described above is shown below. Those which have been called "plants" are in bold; the way in which the groups of green algae are combined and named varies between authors. Algae comprise several different groups of organisms which produce food by photosynthesis and thus have traditionally been included in the plant kingdom.
The seaweeds range from large multicellular algae to single-celled organisms and are classified into three groups, the green algae, red algae and brown algae. There is good evidence that the brown algae evolved independently from the others, from non-photosynthetic ancestors that formed endosymbiotic relationships with red algae rather than from cyanobacteria, they are no longer classified as plants as defined here; the Viridiplantae, the green plants – green algae and land plants – form a clade, a group consisting of all the descendants of a common ancestor. With a few exceptions, the green plants have the following features in common, they undergo closed mitosis without centrioles, have mitochondria with flat cristae. The chloroplasts of green plants are surrounded by two membranes, suggesting they originated directly from endosymbiotic cyanobacteria. Two additional groups, the Rhodophyta and Glaucophyta have primary chloroplasts that appear to be derived directly from endosymbiotic cyanobacteria, although they differ from Viridiplantae in the pigments which are used in photosynthesis and so are different in colour.
These groups differ from green plants in that the storage polysaccharide is floridean starch and is stored in the cytoplasm rather than in the plastids. They appear to have had a common origin with Viridiplantae and the three groups form the clade Archaeplastida, whose name implies that their chloroplasts were derived from a single ancient endosymbiotic event; this is the broadest modern definition of the term'plant'. In contrast, most other algae not only have different pigments but have chloroplasts with three or four surrounding membranes, they are not close relatives of the Archaeplastida having acquired chloroplasts separately from ingested or symbiotic green and red algae. They are thus not included in the broadest modern definition of the plant kingdom, although they were in the past; the green plants or Viridiplantae were traditionally divided into the green algae (including