1.
Cannabis (drug)
–
Cannabis, also known as marijuana among several other names, is a preparation of the Cannabis plant intended for use as a psychoactive drug or medicine. The main psychoactive part of cannabis is tetrahydrocannabinol, one of 483 known compounds in the plant, Cannabis can be used by smoking, vaporization, within food, or as an extract. Cannabis is often used for its mental and physical effects, such as a high or stoned feeling, a change in perception, euphoria. Short term side effects may include a decrease in short-term memory, dry mouth, impaired motor skills, red eyes, long term side effects may include addiction, decreased mental ability in those who started as teenagers, and behavioral problems in children whose mothers used cannabis during pregnancy. Onset of effects is within minutes when smoked and about 30 to 60 minutes when cooked and they last for between two and six hours. Cannabis is mostly used recreationally or as a medicinal drug and it may also be used for religious or spiritual purposes. In 2013, between 128 and 232 million people used cannabis, in 2015, 43% of Americans had used cannabis, which increased to 51% in 2016. About 12% have used it in the past year, and 7. 3% have used it in the past month and this makes it the most commonly used illegal drug both in the world and the United States. The earliest recorded uses date from the 3rd millennium BC, since the early 20th century, cannabis has been subject to legal restrictions. The possession, use, and sale of cannabis is illegal in most countries of the world, Medical cannabis refers to the physician-recommended use of cannabis, which is taking place in Canada, Belgium, Australia, the Netherlands, Spain, and 23 U. S. states. Cannabis use started to become popular in the US in the 1970s, support for legalization has increased in the United States and several US states have legalized recreational or medical use. Medical cannabis, or medical marijuana can refer to the use of cannabis and its cannabinoids to treat disease or improve symptoms, however, the use of cannabis as a medicine has not been rigorously scientifically tested, often due to production restrictions and other federal regulations. There is limited evidence suggesting cannabis can be used to reduce nausea and vomiting during chemotherapy, to improve appetite in people with HIV/AIDS and its use for other medical applications is insufficient for conclusions about safety or efficacy. Short-term use increases the risk of minor and major adverse effects. Common side effects include dizziness, feeling tired, vomiting, long-term effects of cannabis are not clear. Concerns include memory and cognition problems, risk of addiction, schizophrenia in people. Cannabis has psychoactive and physiological effects when consumed, at higher doses, effects can include altered body image, auditory and/or visual illusions, pseudohallucinations and ataxia from selective impairment of polysynaptic reflexes. In some cases, cannabis can lead to states such as depersonalization and derealization
2.
Taxonomy (biology)
–
Taxonomy is the science of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. The exact definition of taxonomy varies from source to source, but the core of the remains, the conception, naming. There is some disagreement as to whether biological nomenclature is considered a part of taxonomy, the broadest meaning of taxonomy is used here. The word taxonomy was introduced in 1813 by Candolle, in his Théorie élémentaire de la botanique, the term alpha taxonomy is primarily used today to refer to the discipline of finding, describing, and naming taxa, particularly species. In earlier literature, the term had a different meaning, referring to morphological taxonomy, ideals can, it may be said, never be completely realized. They have, however, a value of acting as permanent stimulants. Some of us please ourselves by thinking we are now groping in a beta taxonomy, turrill thus explicitly excludes from alpha taxonomy various areas of study that he includes within taxonomy as a whole, such as ecology, physiology, genetics, and cytology. He further excludes phylogenetic reconstruction from alpha taxonomy, thus, Ernst Mayr in 1968 defined beta taxonomy as the classification of ranks higher than species. This activity is what the term denotes, it is also referred to as beta taxonomy. How species should be defined in a group of organisms gives rise to practical and theoretical problems that are referred to as the species problem. The scientific work of deciding how to define species has been called microtaxonomy, by extension, macrotaxonomy is the study of groups at higher taxonomic ranks, from subgenus and above only, than species. While some descriptions of taxonomic history attempt to date taxonomy to ancient civilizations, earlier works were primarily descriptive, and focused on plants that were useful in agriculture or medicine. There are a number of stages in scientific thinking. Early taxonomy was based on criteria, the so-called artificial systems. Later came systems based on a complete consideration of the characteristics of taxa, referred to as natural systems, such as those of de Jussieu, de Candolle and Bentham. The publication of Charles Darwins Origin of Species led to new ways of thinking about classification based on evolutionary relationships and this was the concept of phyletic systems, from 1883 onwards. This approach was typified by those of Eichler and Engler, the advent of molecular genetics and statistical methodology allowed the creation of the modern era of phylogenetic systems based on cladistics, rather than morphology alone. Taxonomy has been called the worlds oldest profession, and naming and classifying our surroundings has likely been taking place as long as mankind has been able to communicate
3.
Plant
–
Plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. The term is generally limited to the green plants, which form an unranked clade Viridiplantae. This includes the plants, conifers and other gymnosperms, ferns, clubmosses, hornworts, liverworts, mosses and the green algae. Green plants have cell walls containing cellulose and obtain most of their energy from sunlight via photosynthesis by primary chloroplasts and their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic and have lost the ability to produce amounts of chlorophyll or to photosynthesize. Plants are characterized by sexual reproduction and alternation of generations, although reproduction is also common. There are about 300–315 thousand species of plants, of which the great majority, green plants provide most of the worlds molecular oxygen and are the basis of most of Earths ecologies, especially on land. Plants that produce grains, fruits and vegetables form humankinds basic foodstuffs, Plants play many roles in culture. They are used as ornaments and, until recently and in variety, they have served as the source of most medicines. The scientific study of plants is known as botany, a branch of biology, Plants are one of the two groups into which all living things were traditionally divided, the other is animals. The division goes back at least as far as Aristotle, who distinguished between plants, which generally do not move, and animals, which often are mobile to catch their food. Much later, when Linnaeus created the basis of the system of scientific classification. Since then, it has become clear that the plant kingdom as originally defined included several unrelated groups, however, these organisms are still often considered plants, particularly in popular contexts. When the name Plantae or plant is applied to a group of organisms or taxon. The evolutionary history of plants is not yet settled. Those which have been called plants are in bold, the way in which the groups of green algae are combined and named varies considerably between authors. Algae comprise several different groups of organisms which produce energy through photosynthesis, most conspicuous among the algae are the seaweeds, multicellular algae that may roughly resemble land plants, but are classified among the brown, red and green algae. Each of these groups also includes various microscopic and single-celled organisms
4.
Flowering plant
–
The flowering plants, also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants, with 416 families, approx. 13,164 known genera and a total of c.295,383 known species, etymologically, angiosperm means a plant that produces seeds within an enclosure, in other words, a fruiting plant. The term angiosperm comes from the Greek composite word meaning enclosed seeds, the ancestors of flowering plants diverged from gymnosperms in the Triassic Period, during the range 245 to 202 million years ago, and the first flowering plants are known from 160 mya. They diversified extensively during the Lower Cretaceous, became widespread by 120 mya, angiosperms differ from other seed plants in several ways, described in the table. These distinguishing characteristics taken together have made the angiosperms the most diverse and numerous land plants, the amount and complexity of tissue-formation in flowering plants exceeds that of gymnosperms. The vascular bundles of the stem are arranged such that the xylem and phloem form concentric rings, in the dicotyledons, the bundles in the very young stem are arranged in an open ring, separating a central pith from an outer cortex. In each bundle, separating the xylem and phloem, is a layer of meristem or active formative tissue known as cambium, the soft phloem becomes crushed, but the hard wood persists and forms the bulk of the stem and branches of the woody perennial. Among the monocotyledons, the bundles are more numerous in the stem and are scattered through the ground tissue. They contain no cambium and once formed the stem increases in diameter only in exceptional cases, the characteristic feature of angiosperms is the flower. Flowers show remarkable variation in form and elaboration, and provide the most trustworthy external characteristics for establishing relationships among angiosperm species, the function of the flower is to ensure fertilization of the ovule and development of fruit containing seeds. The floral apparatus may arise terminally on a shoot or from the axil of a leaf, occasionally, as in violets, a flower arises singly in the axil of an ordinary foliage-leaf. There are two kinds of cells produced by flowers. Microspores, which divide to become pollen grains, are the male cells and are borne in the stamens. The female cells called megaspores, which divide to become the egg cell, are contained in the ovule. The flower may consist only of parts, as in willow. Usually, other structures are present and serve to protect the sporophylls, the individual members of these surrounding structures are known as sepals and petals. The outer series is usually green and leaf-like, and functions to protect the rest of the flower, the inner series is, in general, white or brightly colored, and is more delicate in structure. It functions to attract insect or bird pollinators, attraction is effected by color, scent, and nectar, which may be secreted in some part of the flower
5.
Eudicots
–
The eudicots, Eudicotidae or eudicotyledons are a monophyletic clade of flowering plants that had been called tricolpates or non-magnoliid dicots by previous authors. The close relationships among flowering plants with tricolpate pollen grains was initially seen in studies of shared derived characters. These plants have a trait in their pollen grains of exhibiting three colpi or grooves paralleling the polar axis. Later molecular evidence confirmed the basis for the evolutionary relationships among flowering plants with tricolpate pollen grains. The term means true dicotyledons, as it contains the majority of plants that have been considered dicots and have characteristics of the dicots, the term eudicots has subsequently been widely adopted in botany to refer to one of the two largest clades of angiosperms, monocots being the other. The remaining angiosperms are sometimes referred to as basal angiosperms or paleodicots, the other name for the eudicots is tricolpates, a name which refers to the grooved structure of the pollen. Members of the group have tricolpate pollen, or forms derived from it and these pollens have three or more pores set in furrows called colpi. In contrast, most of the seed plants produce monosulcate pollen. The name tricolpates is preferred by some botanists to avoid confusion with the dicots, numerous familiar plants are eudicots, including many common food plants, trees, and ornamentals. Most leafy trees of midlatitudes also belong to eudicots, with exceptions being magnolias and tulip trees which belong to magnoliids, and Ginkgo biloba. The name eudicots is used in the APG system, of 1998 and it is applied to a clade, a monophyletic group, which includes most of the dicots. The eudicots can be divided into two groups, the basal eudicots and the core eudicots, basal eudicot is an informal name for a paraphyletic group. The core eudicots are a monophyletic group, a 2010 study suggested the core eudicots can be divided into two clades, Gunnerales and a clade called Pentapetalae, comprising all the remaining core eudicots
6.
Rosids
–
The rosids are members of a large clade of flowering plants, containing about 70,000 species, more than a quarter of all angiosperms. The clade is divided into 16 to 20 orders, depending upon circumscription and classification and these orders, in turn, together comprise about 140 families. Fossil rosids are known from the Cretaceous period, molecular clock estimates indicate that the rosids originated in the Aptian or Albian stages of the Cretaceous, between 125 and 99.6 million years ago. The name is based upon the name Rosidae, which had usually been understood to be a subclass, in 1967, Armen Takhtajan showed that the correct basis for the name Rosidae is a description of a group of plants published in 1830 by Friedrich Gottlieb Bartling. The clade was later renamed Rosidae and has been variously delimited by different authors, the name rosids is informal and not assumed to have any particular taxonomic rank like the names authorized by the ICBN. The rosids are monophyletic based upon evidence found by molecular phylogenetic analysis, three different definitions of the rosids were used. Some authors included the orders Saxifragales and Vitales in the rosids, others excluded both of these orders. The circumscription used in this article is that of the APG IV classification, which includes Vitales, the rosids and Saxifragales form the superrosids clade. This is one of three groups compose the Pentapetalae, the others being Dilleniales and the superasterids. The rosids consist of two groups, the order Vitales and the eurosids, the eurosids, in turn, are divided into two groups, fabids and malvids. The rosids consist of 17 orders, in addition to Vitales, there are 8 orders in fabids and 8 orders in malvids. Some of the orders have only recently been recognized and these are Vitales, Zygophyllales, Crossosomatales, Picramniales, and Huerteales. The phylogeny of Rosids shown below is adapted from the Angiosperm Phylogeny Group website, the nitrogen-fixing clade contains a high number of actinorhizal plants. Not all plants in this clade are actinorhizal, however, media related to Rosids at Wikimedia Commons
7.
Rosales
–
Rosales is an order of flowering plants. It is sister to a clade consisting of Fagales and Cucurbitales and it contains about 7700 species, distributed into about 260 genera. Rosales comprise nine families, the family being the rose family. The largest of these families are Rosaceae and Urticaceae, the order Rosales is divided into three clades that have never been assigned a taxonomic rank. The basal clade consists of the family Rosaceae, another clade consists of four families, including Rhamnaceae, the order Rosales is strongly supported as monophyletic in phylogenetic analyses of DNA sequences, such as those carried out by members of the Angiosperm Phylogeny Group. In their APG III system of plant classification, they defined Rosales as consisting of the nine families listed in the box on the right. The relationships of these families were uncertain until 2011, when they were resolved in a phylogenetic study based on two nuclear genes and ten chloroplast genes. In the classification system of Dahlgren the Rosales were in the superorder Rosiflorae, in the obsolete Cronquist system, the order Rosales was many times polyphyletic. It consisted of the family Rosaceae and 23 other families that are now placed in other orders
8.
Cannabaceae
–
Cannabaceae is a small family of flowering plants. As now circumscribed, the family includes about 170 species grouped in about 11 genera, including Cannabis, Humulus, Celtis is by far the largest genus, containing about 100 species. Other than an evolutionary origin, members of the family have few common characteristics, some are trees. Members of this family can be trees, erect herbs, or twining herbs, leaves are often more or less palmately lobed or palmately compound and always bear stipules. Cystoliths are always present and some members of this family possess laticifers, the flowers are actinomorphic and not showy, as these plants are pollinated by the wind. As an adaptation to this kind of pollination, the calyx is short, flowers are grouped to form cymes. In the dioecious plants the masculine inflorescences are long and look like panicles, while the feminine are shorter, the pistil is made of two connate carpels, the usually superior ovary is unilocular, there is no fixed number of stamens. The fruit can be an achene or a drupe, modern molecular phylogenetics suggest the following relationships, Cannabaceae comprises the following genera, Aphananthe Planch. 1848 Cannabis L. 1753—Hemp Celtis L.1753 Chaetachme Planch,1844 Humulus L. 1753—Hop Lozanella Greenm. 1906 Parasponia Miq.1851 Pteroceltis Maxim,1790 Carbon dating has revealed that these plants may have been used for ritual/medicinal purposes in Xinjiang, China as early as 494 B. C. Hop has been the predominant bittering agent of beer for hundreds of years, the flowers resins are responsible for beers bitterness and their ability to extend shelf life due to some anti-microbial qualities. The young shoots are used as vegetable, different subspecies of hemp are cultivated for the production of fiber, as a source of cheap oil, for the nutritious seeds, or its edible leaves. Species in the genus Cannabis are cultivated for medical or recreational use as marijuana, many trees in the genus Celtis are grown for landscaping and ornamental purposes
9.
Carl Linnaeus
–
Carl Linnaeus, also known after his ennoblement as Carl von Linné, was a Swedish botanist, physician, and zoologist, who formalised the modern system of naming organisms called binomial nomenclature. He is known by the father of modern taxonomy. Many of his writings were in Latin, and his name is rendered in Latin as Carolus Linnæus, Linnaeus was born in the countryside of Småland, in southern Sweden. He received most of his education at Uppsala University. He lived abroad between 1735 and 1738, where he studied and also published a first edition of his Systema Naturae in the Netherlands and he then returned to Sweden, where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on journeys through Sweden to find and classify plants. In the 1750s and 1760s, he continued to collect and classify animals, plants, and minerals, at the time of his death, he was one of the most acclaimed scientists in Europe. The philosopher Jean-Jacques Rousseau sent him the message, Tell him I know no man on earth. The German writer Johann Wolfgang von Goethe wrote, With the exception of Shakespeare and Spinoza, Swedish author August Strindberg wrote, Linnaeus was in reality a poet who happened to become a naturalist. Among other compliments, Linnaeus has been called Princeps botanicorum, The Pliny of the North and he is also considered as one of the founders of modern ecology. In botany, the abbreviation used to indicate Linnaeus as the authority for species names is L. In older publications, sometimes the abbreviation Linn. is found, Linnæus was born in the village of Råshult in Småland, Sweden, on 23 May 1707. He was the first child of Nicolaus Ingemarsson and Christina Brodersonia and his siblings were Anna Maria Linnæa, Sofia Juliana Linnæa, Samuel Linnæus, and Emerentia Linnæa. One of a line of peasants and priests, Nils was an amateur botanist, a Lutheran minister. Christina was the daughter of the rector of Stenbrohult, Samuel Brodersonius, a year after Linnæus birth, his grandfather Samuel Brodersonius died, and his father Nils became the rector of Stenbrohult. The family moved into the rectory from the curates house, even in his early years, Linnæus seemed to have a liking for plants, flowers in particular. Whenever he was upset, he was given a flower, which calmed him. Nils spent much time in his garden and often showed flowers to Linnaeus, soon Linnæus was given his own patch of earth where he could grow plants
10.
Cannabis sativa
–
Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded history as a source of fibre, seed oil, food, recreation, religious and spiritual moods. Each part of the plant is harvested differently, depending on the purpose of its use, the species was first classified by Carl Linnaeus in 1753. Its seeds are used to make hempseed oil which can be used for cooking, lamps. They can also be used as feed, as they provide a moderate source of nutrients for most birds. The flowers contain psychoactive chemical compounds known as cannabinoids that are consumed for recreational, medicinal and spiritual purposes, when so used, preparations of flowers and leaves and preparations derived from resinous extract are consumed by smoking, vaporising and oral ingestion. Historically, tinctures, teas and ointments have also been common preparations, in traditional medicine of India in particular C. sativa has been used as hallucinogenic, hypnotic, sedative, analgesic and anti-inflammatory agent. The flowers of the plant are arranged in racemes and can produce hundreds of seeds. Male plants shed their pollen and die several weeks prior to seed ripening on the female plants, although genetic factors dispose a plant to become male or female, environmental factors including the diurnal light cycle can alter sexual expression. Naturally occurring monoecious plants, with male and female parts, are either sterile or fertile but artificially induced hermaphrodites can have fully functional reproductive organs. Feminized seed sold by commercial seed suppliers are derived from artificially hermaphrodytic females that lack the male gene. In the case of production related to use of Cannabis. A Cannabis plant in the growth phase of its life requires more than 12–13 hours of light per day to stay vegetative. Flowering usually occurs when darkness equals at least 12 hours per day, the flowering cycle can last anywhere between nine and fifteen weeks, depending on the strain and environmental conditions. In soil, the optimum pH for the plant is 6.3 to 6.8. In hydroponic growing, the nutrient solution is best at 5.2 to 5.8, making Cannabis well-suited to hydroponics because this pH range is hostile to most bacteria and fungi. Broadly, there are three main groups of cannabis that are cultivated today, Cultivars primarily cultivated for their fibre, characterised by long stems. Cultivars grown for seed which can be eaten raw or from which hemp oil is extracted
11.
Cannabis indica
–
Cannabis indica, formally known as Cannabis sativa forma indica, is an annual plant in the Cannabaceae family. A putative species of the genus Cannabis, in 1785, Jean-Baptiste Lamarck published a description of a second species of Cannabis, which he named Cannabis indica. Lamarck based his description of the named species on plant specimens collected in India. Richard Evans Schultes described C. indica as relatively short, conical, loran C. Anderson described C. indica plants as having short, broad leaflets whereas those of C. sativa were characterized as relatively long and narrow. Cannabis indica plants conforming to Schultess and Andersons descriptions may have originated from the Hindu Kush mountain range, because of the often harsh and variable climate of those parts, C. indica is well-suited for cultivation in temperate climates. Broad-leafed Cannabis indica plants in India, Afghanistan, Bangladesh and Pakistan are traditionally cultivated for the production of charas, differences in the terpenoid content of the essential oil may account for some of these differences in effect. Common indica strains for recreational or medicinal use include Kush and Northern Lights, a recent genetic analysis included both the narrow-leaflet and wide-leaflet drug biotypes under C. indica, as well as southern and eastern Asian hemp landraces and wild Himalayan populations. There are several key differences between Cannabis indica and Cannabis sativa and these include height and stature, internodal length, leaf size and structure, buds size and density, flowering time, odour, smoke and effects. Indica plants tend to grow shorter and bushier than the sativa plants, Indica strains tend to have wide, short leaves with short wide blades, whereas sativa strains have long leaves with thin long blades. The buds of indica strains tend to be wide, dense and bulky, while sativa strains are likely to be long, on average, Cannabis sativa has higher levels of THC compared to CBD, whereas Cannabis indica has lower levels of THC to CBD. However, huge variability exists within either species, a 2015 study shows the average THC content of the most popular herbal cannabis products in the Netherlands has decreased slightly since 2005. In the recent era of cannabis breeding higher-ratio CBD strains are being developed from Indica origins that may test out as 1,1 or even as high as a 22,1. The medical interests in Cannabis are taking this further and we will see increasing cultivation trends for more developed with CBD-dominant ratios. In California, cities such as Coachella and Desert Hot Springs are re-zoning areas for cannabis cultivation, low anxiety and hallucinogenic properties make these high-CBD strains very desirable for chronic treatment programs. There are three types of Cannabis, one with high levels of THC, one which is more fibrous and has higher levels of CBD. Cannabis strains with CBD, THC ratios above 5,2 are likely to be more relaxing and this may be due to CBDs antagonistic effects at the cannabinoid receptors, compared to THCs partial agonist effect. CBD is also a 5-HT1A receptor agonist, which may contribute to an anxiolytic-content effect. The effects of sativa are well known for its cerebral high, users can expect a more vivid and uplifting high, while indica is well known for its sedative effects which some prefer for night time use
12.
Cannabis ruderalis
–
Cannabis ruderalis is a species of Cannabis originating in central Russia. It is less common than the species of Cannabis. The term ruderalis is derived from the Latin rūdera, which is the form of rūdus. A ruderal species refers to any plant that is the first to land after a disturbance removing competition. Cannabis ruderalis rarely grows over two feet in height, and matures in approximately seven weeks, the plants have a thin, slightly fibrous stem with little branching. Foliage is open with large leaves, Cannabis ruderalis will produce flowers based on its age, rather than light cycle, unlike flowering in C. sativa and C. indica varieties. This kind of flowering is also known as autoflowering and it has less THC in its resin compared to other Cannabis species. However, it is high in cannabidiol. Cannabis ruderalis was first scientifically identified in 1942 in southern Siberia, the Russian botanist, Janischewski, was studying wild Cannabis in the Volga River system and realized he had come upon a third species. C. ruderalis is a variety grown in the northern Himalayas and southern states of the former Soviet Union, characterized by a more sparse. Similar C. ruderalis populations can be found in most of the areas where hemp cultivation was once prevalent, the most notable region in North America is the midwestern United States, though populations occur sporadically throughout the United States and Canada. Large wild C. ruderalis populations are found in central and eastern Europe, most of them in Lithuania, Belarus, Latvia, Estonia. Without human selection, these plants have lost many of the traits they were selected for. Seeds of C. ruderalis were brought to Amsterdam in the early 1980s in order to enhance the program of the Seed Bank. Cannabis ruderalis strains are high in the cannabіnoid cannabidiol, so they are grown by some medical marijuana users, however, C. ruderalis early, plant-age triggered autoflowering characteristic as well as its reputed resistance to insect and disease pressures makes it attractive to plant breeders. C. indica strains are frequently cross-bred with C. ruderalis to produce autoflowering plants with high THC content, improved hardiness, one strain, identified in 1960, is Cannabis x intersita Sojak which is a cross between C. sativa and C. ruderalis. Attempts to produce a Cannabis strain with a growing season are another application of cultivating C. ruderalis. C. ruderalis when crossed with sativa and indica strains produces a plant which flowers automatically and is mature in 10 weeks
13.
Genus
–
A genus is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of classification, genus comes above species. In binomial nomenclature, the name forms the first part of the binomial species name for each species within the genus. Felis catus and Felis silvestris are two species within the genus Felis, Felis is a genus within the family Felidae. The composition of a genus is determined by a taxonomist, the standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. Moreover, genera should be composed of units of the same kind as other genera. The term comes from the Latin genus, a noun form cognate with gignere, linnaeus popularized its use in his 1753 Species Plantarum, but the French botanist Joseph Pitton de Tournefort is considered the founder of the modern concept of genera. The scientific name of a genus may be called the name or generic epithet. It plays a role in binomial nomenclature, the system of naming organisms. The rules for the names of organisms are laid down in the Nomenclature Codes. The standard way of scientifically describing species and other lower-ranked taxa is by binomial nomenclature, the generic name forms its first half. For example, the gray wolfs binomial name is Canis lupus, with Canis being the name shared by the wolfs close relatives. The specific name is written in lower-case and may be followed by names in zoology or a variety of infraspecific names in botany. Especially with these names, when the generic name is known from context. Because animals are typically only grouped within subspecies, it is written as a trinomen with a third name. Dog breeds, meanwhile, are not scientifically distinguished, there are several divisions of plant species and therefore their infraspecific names generally include contractions explaining the relation. For example, the genus Hibiscus includes hundreds of other species apart from the Rose of Sharon or common garden hibiscus, Rose of Sharon doesnt have subspecies but has cultivars that carry desired traits, such as the bright white H. syriaca Diana. Hawaiian hibiscus, meanwhile, includes several separate species, since not all botanists agree on the divisions or names between species, it is common to specify the source of the name using author abbreviations
14.
Central Asia
–
Central Asia stretches from the Caspian Sea in the west to China in the east and from Afghanistan in the south to Russia in the north. It is also referred to as the -stans as the five countries generally considered to be within the region all have names ending with the Persian suffix -stan. Central Asias five former Soviet republics are Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Central Asia has historically been closely tied to its nomadic peoples and the Silk Road. It has acted as a crossroads for the movement of people, goods, the Silk Road connected Muslim lands with the people of Europe, India, and China. This crossroads position has intensified the conflict between tribalism and traditionalism and modernization, in pre-Islamic and early Islamic times, Central Asia was predominantly Iranian, peopled by Eastern Iranian-speaking Bactrians, Sogdians and Chorasmians and the semi-nomadic Scythians and Parthians. Central Asia is sometimes referred to as Turkestan, the idea of Central Asia as a distinct region of the world was introduced in 1843 by the geographer Alexander von Humboldt. The borders of Central Asia are subject to multiple definitions, historically built political geography and geoculture are two significant parameters widely used in the scholarly literature about the definitions of the Central Asia. The most limited definition was the one of the Soviet Union. This definition was also used outside the USSR during this period. However, the Russian culture has two terms, Средняя Азия and Центральная Азия. Since then, this has become the most common definition of Central Asia, the UNESCO general history of Central Asia, written just before the collapse of the USSR, defines the region based on climate and uses far larger borders. An alternative method is to define the region based on ethnicity and these areas include Xinjiang Uyghur Autonomous Region, the Turkic regions of southern Siberia, the five republics, and Afghan Turkestan. Afghanistan as a whole, the northern and western areas of Pakistan, the Tibetans and Ladakhi are also included. Insofar, most of the peoples are considered the indigenous peoples of the vast region. Central Asia is a large region of varied geography, including high passes and mountains, vast deserts. The vast steppe areas of Central Asia are considered together with the steppes of Eastern Europe as a geographical zone known as the Eurasian Steppe. Much of the land of Central Asia is too dry or too rugged for farming, the Gobi desert extends from the foot of the Pamirs, 77° E, to the Great Khingan Mountains, 116°–118° E. Central Asia has the following geographic extremes, The worlds northernmost desert, at Buurug Deliin Els, Mongolia, the Northern Hemispheres southernmost permafrost, at Erdenetsogt sum, Mongolia, 46°17′ N
15.
Indian subcontinent
–
Geologically, the Indian subcontinent is related to the land mass that rifted from Gondwana and merged with the Eurasian plate nearly 55 million years ago. Geographically, it is the region in south-central Asia delineated by the Himalayas in the north, the Hindu Kush in the west. Politically, the Indian subcontinent usually includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, sometimes, the term South Asia is used interchangeably with Indian subcontinent. There is no consensus about which countries should be included in each and it is first attested in 1845 to refer to the North and South Americas, before they were regarded as separate continents. Its use to refer to the Indian subcontinent is seen from the twentieth century. It was especially convenient for referring to the region comprising both the British India and the states under British Paramountcy. The term Indian subcontinent also has a geological significance and it was, like the various continents, a part of the supercontinent of Gondwana. A series of tectonic splits caused formation of basins, each drifting in various directions. The geological region called the Greater India once included the Madagascar, Seychelles, Antartica, as a geological term, Indian subcontinent has meant that region formed from the collision of the Indian basin with Eurasia nearly 55 million years ago, towards the end of Paleocene. The Indian subcontinent has been a particularly common in the British Empire. The region, state Mittal and Thursby, has also labelled as India, Greater India. The BBC and some sources refer to the region as the Asian Subcontinent. Some academics refer to it as South Asian Subcontinent, the terms Indian subcontinent and South Asia are sometimes used interchangeably. There is no accepted definition on which countries are a part of South Asia or Indian subcontinent. In dictionary entries, the term subcontinent signifies a large, distinguishable subdivision of a continent, the region experienced high volcanic activity and plate subdivisions, creating Madagascar, Seychelles, Antartica, Austrolasia and the Indian subcontinent basin. The Indian subcontinent drifted northeastwards, colliding with the Eurasian plate nearly 55 million years ago and this geological region largely includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka. The zone where the Eurasian and Indian subcontinent plates meet remains one of the active areas. The English term mainly continues to refer to the Indian subcontinent, physiographically, it is a peninsular region in south-central Asia delineated by the Himalayas in the north, the Hindu Kush in the west, and the Arakanese in the east
16.
Hemp
–
Hemp or industrial hemp, typically found in the northern hemisphere, is a variety of the Cannabis sativa plant species that is grown specifically for the industrial uses of its derived products. It is one of the fastest growing plants and was one of the first plants to be spun into usable fiber 10,000 years ago. It can be refined into a variety of items including paper, textiles, clothing, biodegradable plastics, paint, insulation, biofuel, food. Hemp has lower concentrations of THC and higher concentrations of cannabidiol, the legality of industrial hemp varies widely between countries. Some governments regulate the concentration of THC and permit only hemp that is bred with an especially low THC content, then it appears to have been borrowed into Latin, and separately into Slavic and from there into Baltic, Finnish, and Germanic languages. Following Grimms law, the k would have changed to h with the first Germanic sound shift, after which it may have been adapted into the Old English form, hænep. Another possible source of origin is Assyrian qunnabu, which was the name for a source of oil, fiber, cognates of hemp in other Germanic languages, include Dutch hennep, Danish and Norwegian, hamp, German, hanf, and Swedish, hampa. Hemp is used to make a variety of commercial and industrial products including rope, clothes, food, paper, textiles, plastics, insulation, the inner two fibers of the plant are more woody and typically have industrial applications, such as mulch, animal bedding and litter. When oxidized, hemp oil from the seeds becomes solid and can be used in the manufacture of oil-based paints, in creams as an agent, for cooking. Hemp seeds have been used in bird feed mix as well, a survey in 2003 showed that more than 95% of hemp seed sold in the European Union was used in animal and bird feed. Hemp seeds can be raw, ground into a meal, sprouted. The leaves of the plant can be consumed raw in salads. Hemp can also be made into a liquid and used for baking or for such as hemp milk, hemp juice. Hempseed oil is cold-pressed from the seed and is high in unsaturated fatty acids. In 2011, the U. S. imported $11.5 million worth of products, mostly driven by growth in demand for hemp seed. In the U. S. imported hemp can be used legally in food products,100 grams of hulled hemp seeds supply 586 calories. They are 5% water, 5% carbohydrates, 49% total fat, Hemp seeds are notable in providing 64% of the Daily Value of protein per 100 gram serving. Hempseed amino acid profile is comparable to other sources of such as meat, milk, eggs
17.
Hemp oil
–
Hemp oil or hempseed oil is obtained by pressing hemp seeds. Cold pressed, unrefined hemp oil is dark to light green in color. The darker the color, the grassier the flavour and it should not be confused with hash oil, a tetrahydrocannabinol-containing oil made from the Cannabis flower, hailed by some for its medicinal qualities. Refined hempseed oil is clear and colorless, with flavor and lacks natural vitamins. Refined hempseed oil is used in body care products. Industrial hempseed oil is used in lubricants, paints, inks, fuel, hempseed oil has found some limited use in the production of soaps, shampoos and detergents. The oil is of high nutritional value because of its 3,1 ratio of omega-6 to omega-3 essential fatty acids and it has also received attention in recent years as a possible feedstock for the large-scale production of biodiesel. There are a number of organizations that promote the production and use of hempseed oil, hempseed oil is manufactured from varieties of Cannabis sativa that do not contain significant amounts of tetrahydrocannabinol, the psychoactive element present in the cannabis plant. This manufacturing process typically includes cleaning the seed to 99. 99% before pressing the oil, there is no THC within the hempseed, although trace amounts of THC may be found in hempseed oil when plant matter adheres to the seed surface during manufacturing. The modern production of hempseed oil, particularly in Canada, has successfully lowered THC values since 1998, regular accredited sampling of THC in Canadian hemp seed oil shows THC levels usually below detection limit of 4 ppm. Legal limit for THC content in foodstuffs in Canada is 10 ppm, some European countries have limits of 5ppm or none-detected, some EU countries do not have such limits at all. The proportions of linoleic acid and alpha-linolenic acid in one tablespoon per day of hempseed oil easily provides human daily requirements for EFAs, advocates of hempseed oil hold that unlike flaxseed oil, hempseed oil can be used continuously without developing a deficiency or other imbalance of EFAs. In common with other oils, hempseed oil provides 9 kcal/g, compared with other culinary oils it is low in saturated fatty acids. Hempseed oil can be frozen for periods of storage time. Preservatives are not necessary for high-quality oils that are stored properly, hempseed oil has a relatively low smoke point and is not suitable for frying. Hempseed oil is used as a food oil and dietary supplement. It has uses similar to linseed oil and characteristics similar to tung oil, Cannabis Cannabis flower essential oil Hemp plastic Vegetable oil
18.
Medical cannabis
–
Medical cannabis, or medical marijuana is cannabis and cannabinoids that are prescribed by doctors for their patients. The use of cannabis as a medicine has not been rigorously tested due to production restrictions, there is a limited amount of evidence that suggests cannabis can reduce nausea and vomiting during chemotherapy, improve appetite in people with HIV/AIDS, and reduce chronic pain and muscle spasms. Short-term use increases the risk of minor and major adverse effects. Common side effects include dizziness, feeling tired, vomiting, long-term effects of cannabis are not clear. Concerns include memory and cognition problems, risk of addiction, schizophrenia in people. The Cannabis plant has a history of use dating back thousands of years across many cultures. The American Academy of Pediatrics states that while cannabinoids may have potential as therapy for a number of medical conditions and they, along with the American Medical Association and the Minnesota Medical Association, call for moving cannabis out of DEA Schedule I to facilitate this research. Synthetic cannabinoids are available as prescription drugs in some countries, examples include, dronabinol, australia is currently in the process of passing a law which would allow the use of marijuana for medical and scientific purposes. Many different cannabis strains are called medical cannabis. Since many varieties of the plant and plant derivatives all share the same name. A Cannabis plant includes more than 400 different chemicals, of which about 70 are cannabinoids, in comparison, typical government-approved medications contain only 1 or 2 chemicals. The number of chemicals in cannabis is one reason why treatment with cannabis is difficult to classify. A2014 review stated that the variations in ratio of CBD-to-THC in botanical and pharmaceutical preparations determines the therapeutic vs psychoactive effects of cannabis products, Medical cannabis has several potential beneficial effects. Evidence is moderate that it helps in chronic pain and muscle spasms, low quality evidence suggests its use for reducing nausea during chemotherapy, improving appetite in HIV/AIDS, improving sleep, and improving tics in Tourette syndrome. When usual treatments are ineffective, cannabinoids have also recommended for anorexia, arthritis, migraine. The FDA finds that cannabis does not meet the criteria for accepted medical use due to lack of evidence regarding safety and it is recommended that cannabis use be stopped in pregnancy. Medical cannabis is somewhat effective in chemotherapy-induced nausea and vomiting and may be an option in those who do not improve following preferential treatment. Long-term cannabis use may cause nausea and vomiting, a known as cannabinoid hyperemesis syndrome
19.
Single Convention on Narcotic Drugs
–
Earlier treaties had only controlled opium, coca, and derivatives such as morphine, heroin and cocaine. The Single Convention, adopted in 1961, consolidated those treaties and broadened their scope to include cannabis, the Commission on Narcotic Drugs and the World Health Organization were empowered to add, remove, and transfer drugs among the treatys four schedules of controlled substances. The International Narcotics Control Board was put in charge of administering controls on production, international trade. As of February 2015, the Single Convention has 185 state parties. The Holy See plus all member states of the United Nations are state parties, with the exception of Chad, East Timor, Equatorial Guinea, Kiribati, Nauru, Samoa, South Sudan, Tuvalu, and Vanuatu. Since the Single Convention is not self-executing, Parties must pass laws to carry out its provisions, the Single Convention has been used as the basis for the standardization of national drug-control laws. In particular, the United States Controlled Substances Act of 1970, both Acts include analogous schemes of drug Scheduling, along with similar procedures for adding, removing, and transferring drugs among the Schedules. The Controlled Substances Act follows the Single Conventions lead in granting a public health authority a central role in drug-scheduling decisions and it also includes a provision mandating that federal authorities control all drugs of abuse in accordance with the strictness required by the Single Convention. The League of Nations adopted several drug control treaties prior to World War II, specifying uniform controls on addictive drugs such as cocaine and opium, and its derivatives. That year, the UN Economic and Social Council convened a conference of 73 nations for the adoption of a single convention on narcotic drugs. That meeting was known as the United Nations Conference on Narcotic Drugs and they were open to socio-cultural drug use, having lived with it for centuries. They favored weak controls because existing restrictions on production and export had directly affected large segments of their domestic population and they supported national control efforts based on local conditions and were wary of strong international control bodies under the UN. They also sought development aid to compensate for losses caused by strict controls and they favored strong supranational control bodies as long as they continued to exercise de facto control over such bodies. Strict control group, These were essentially non-producing and non-manufacturing states with no direct stake in the drug trade. The key members were France, Sweden, Brazil, and the Republic of China, most of the states in this group were culturally opposed to drug use and suffered from abuse problems. They favored restricting drug use to medical and scientific purposes and were willing to sacrifice a degree of sovereignty to ensure the effectiveness of supranational control bodies. They were forced to moderate their demands in order to secure the widest possible agreement, weak control group, This group was led by the Soviet Union and often included its allies in Europe, Asia and Africa. They considered drug control a purely internal issue and adamantly opposed any intrusion on national sovereignty, with little interest in the drug trade and minimal domestic abuse problems, they refused to give any supranational body excessive power, especially over internal decision-making
20.
Tetrahydrocannabinol
–
Tetrahydrocannabinol, or more precisely its main isomer -trans-Δ⁹-tetrahydrocannabinol, is the principal psychoactive constituent of cannabis. It can be a clear, amber or gold colored glassy solid when cold, like most pharmacologically-active secondary metabolites of plants, THC in Cannabis is assumed to be involved in self-defense, perhaps against herbivores. THC also possesses high UV-B absorption properties, which, it has been speculated, THC, along with its double bond isomers and their stereoisomers, is one of only three cannabinoids scheduled by the UN Convention on Psychotropic Substances. It was listed under Schedule I in 1971, but reclassified to Schedule II in 1991 following a recommendation from the WHO, based on subsequent studies, the WHO has recommended the reclassification to the less-stringent Schedule III. Cannabis as a plant is scheduled by the Single Convention on Narcotic Drugs and it is specifically still listed under Schedule I by US federal law under the Controlled Substances Act signed by the US Congress in 1970. A pharmaceutical formulation is available by prescription in the U. S. dronabinol is the INN for a pure isomer of THC, -trans-Δ⁹-tetrahydrocannabinol, which is the main isomer found in cannabis. It is used to treat anorexia in people with HIV/AIDS as well as for refractory nausea and it is safe and effective for these uses. An overdose of dronabinol usually presents with lethargy, decreased motor coordination, slurred speech, there was a single death rated by the investigator as possibly related to treatment. This person had a seizure followed by aspiration pneumonia, the paper does not describe whether this was one of the subjects from the epilepsy trials. The presence of these specialized cannabinoid receptors in the brain led researchers to the discovery of endocannabinoids, such as anandamide, THC targets receptors in a manner far less selective than endocannabinoid molecules released during retrograde signaling, as the drug has a relatively low cannabinoid receptor efficacy and affinity. In populations of low cannabinoid receptor density, THC may act to antagonize endogenous agonists that possess greater receptor efficacy, THC is a lipophilic molecule and may bind non-specifically to a variety of entities in the brain and body, such as adipose tissue. THC, similarly to cannabidiol, albeit less potently, is an allosteric modulator of the μ-. Due to its agonistic activity, THC appears to result in greater downregulation of cannabinoid receptors than endocannabinoids. However, this form of tolerance appears to be irregular throughout mouse brain areas, THC is metabolized mainly to 11-OH-THC by the body. This metabolite is still psychoactive and is oxidized to 11-nor-9-carboxy-THC. In humans and animals, more than 100 metabolites could be identified, metabolism occurs mainly in the liver by cytochrome P450 enzymes CYP2C9, CYP2C19, and CYP3A4. More than 55% of THC is excreted in the feces and ~20% in the urine, the main metabolite in urine is the ester of glucuronic acid and THC-COOH and free THC-COOH. In the feces, mainly 11-OH-THC was detected, the discovery of THC, by a team of researchers from Hebrew University Pharmacy School, was first reported in 1964, with substantial later work reported by Raphael Mechoulam in June 1970
21.
Psychoactive drug
–
A psychoactive drug, psychopharmaceutical, or psychotropic is a chemical substance that changes brain function and results in alterations in perception, mood, or consciousness. These substances may be used recreationally, to alter ones consciousness, or, as entheogens, for ritual, spiritual, or shamanic purposes. Some categories of drugs, which have medical therapeutic value, are prescribed by medical doctors. There are also some psychoactive substances used in the detoxification and rehabilitation programs for drug users. Psychoactive substances often bring about changes in consciousness and mood that the user may find rewarding. In addition, sustained use of some substances may produce a physical dependence or psychological dependence syndrome associated with somatic or psychological-emotional withdrawal states respectively, Drug rehabilitation aims to break this cycle of dependency, through a combination of psychotherapy, support groups, maintenance and even other psychoactive substances. However, the reverse is true in some cases, that certain experiences on drugs may be so unfriendly. This is especially true of certain deliriants, powerful dissociatives, and classic psychedelics, in part because of this potential for substance misuse, addiction, or dependence, the ethics of drug use is debated. Restrictions on drug production and sales in an attempt to drug abuse are very common among national and sub-national governments worldwide. Ethical concerns have also raised about over-use of these drugs clinically. Psychoactive drug use can be traced to prehistory, there is archaeological evidence of the use of psychoactive substances dating back at least 10,000 years, and historical evidence of cultural use over the past 5,000 years. The chewing of coca leaves, for example, dates back over 8,000 years ago in Peruvian society, medicinal use is one important facet of psychoactive drug usage. However, some have postulated that the urge to alter ones consciousness is as primary as the drive to satiate thirst, hunger or sexual desire. Supporters of this belief contend that the history of use and even childrens desire for spinning, swinging. It is, however, necessary to precisely what is meant by the use of drugs. We do not mean the purely physical craving, but there are not many drugs which have the power of stilling such craving. This relationship is not limited to humans, a number of animals consume different psychoactive plants, animals, berries and even fermented fruit, becoming intoxicated, such as cats after consuming catnip. Traditional legends of sacred plants often contain references to animals that introduced humankind to their use, animals and psychoactive plants appear to have co-evolved, possibly explaining why these chemicals and their receptors exist within the nervous system
22.
Cannabinoid
–
A cannabinoid is one of a class of diverse chemical compounds that acts on cannabinoid receptors in cells that alter neurotransmitter release in the brain. Ligands for these proteins include the endocannabinoids, the phytocannabinoids. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol, the psychoactive compound in cannabis. Cannabidiol is another constituent of the plant. There are at least 113 different cannabinoids isolated from cannabis, exhibiting varied effects, the discovery of the first cannabinoid receptors in the 1980s helped to resolve this debate. These receptors are common in animals, and have found in mammals, birds, fish. At present, there are two types of cannabinoid receptors, termed CB1 and CB2, with mounting evidence of more. The human brain has more cannabinoid receptors than any other G protein-coupled receptor type, CB1 receptors are found primarily in the brain, more specifically in the basal ganglia and in the limbic system, including the hippocampus. They are also found in the cerebellum and in male and female reproductive systems. CB1 receptors are absent in the medulla oblongata, the part of the brain responsible for respiratory. CB1 is also found in the anterior eye and retina. CB2 receptors are found in the immune system, or immune-derived cells with the greatest density in the spleen. While found only in the nervous system, a report does indicate that CB2 is expressed by a subpopulation of microglia in the human cerebellum. CB2 receptors appear to be responsible for the anti-inflammatory and possibly other therapeutic effects of cannabis seen in animal models, the classical cannabinoids are concentrated in a viscous resin produced in structures known as glandular trichomes. At least 113 different cannabinoids have been isolated from the Cannabis plant To the right, the best studied cannabinoids include tetrahydrocannabinol, cannabidiol and cannabinol. All classes derive from cannabigerol-type compounds and differ mainly in the way this precursor is cyclized, the classical cannabinoids are derived from their respective 2-carboxylic acids by decarboxylation. CBG CBC CBL CBV THCV CBDV CBCV CBGV CBGM THC THCA CBD CBDA Tetrahydrocannabinol is the psychoactive component of the Cannabis plant. Delta-9-tetrahydrocannabinol and delta-8-tetrahydrocannabinol, mimic the actions of anandamide and 2-arachidonoylglycerol neurotransmitters produced naturally in the body and these cannabinoids produce the effects associated with cannabis by binding to the CB1 cannabinoid receptors in the brain
23.
Hashish
–
Hash is an extracted cannabis product composed of compressed or purified preparations of stalked resin glands, called trichomes, from the plant. This all depends on the process and amount of solvent left over, the name comes from the Arabic word which means grass. It is believed that massive hashish production for international trade originated in Morocco during the 1960s, before the coming of the first hippies from the Hippie Hashish Trail, only small pieces of Lebanese hashish were found in Morocco. In 1596, Dutchman Jan Huyghen van Linschoten spent three pages on Bangue in his work documenting his journeys in the East. He particularly mentioned the Egyptian Hashish and he said, Bangue is likewise much used in Turkie and Egypt, and is made in three sorts, having also three names. In the 1800s, hashish was embraced in some European literary circles, baudelaire later wrote the 1860 book Les paradis artificiels, about the state of being under the influence of opium and hashish. At around the time, American author Fitz Hugh Ludlow wrote the 1857 book The Hasheesh Eater about his youthful experiences. Hashish can be consumed by oral ingestion or smoking, typically in a pipe, vaporizer or joints, Hashish is made from cannabinoid-rich glandular hairs known as trichomes, as well as varying amounts of cannabis flower and leaf fragments. The flowers of a female plant contain the most trichomes. Certain strains of cannabis are cultivated specifically for their ability to produce amounts of trichomes. The resin reservoirs of the trichomes, sometimes erroneously called pollen, are separated from the plant through various methods, mechanical separation methods use physical action to remove the trichomes from the plant, such as sieving through a screen by hand or in motorized tumblers. This technique is known as drysifting, the resulting powder, referred to as kief or drysift, is compressed with the aid of heat into blocks of hashish, if pure, the kief will become gooey and pliable. When a high level of pure THC is present, the end product will be almost transparent, ice-water separation is another mechanical method of isolating trichomes. Newer techniques have developed such as heat and pressure separations. Trichomes may break away from supporting stalks and leaves when plant material becomes brittle at low temperatures, the ice-water method requires ice, water, agitation, filtration bags with various-sized screens and plant material. With the ice-water extraction method the resin becomes hard and brittle and this allows large quantities of pure resins to be extracted in a very clean process without the use of solvents, making for a more purified hashish. Chemical separation methods use a solvent such as ethanol, butane or hexane to dissolve the lipophilic desirable resin. Remaining plant materials are filtered out of the solution and sent to the compost, the solvent is then evaporated, or boiled off leaving behind the desirable resins, called honey oil, hash oil, or just oil
24.
Hash oil
–
Hash oil is an oleoresin obtained by the extraction of marijuana and/or hashish. The tetrahydrocannabinol content of oil varies tremendously, since the manufacturers use a varying assortment of marijuana plants. Dealers sometimes cut hash oils with other oils, hash oils seized in the 1970s had a THC contents ranging from 10 to 30%. The oil available on the U. S, west Coast in 1974 averaged about 15% THC. The highest THC concentrations measured were 52. 9% in hashish and 47. 0% in hash oil, monoterpenes, β-pinene, myrcene, β-phellandrene, cis-ocimene, terpinolene, and terpineol. Sesquiterpenes, β-caryophyllene, humulene, δ-guaiene, γ-cadinene, eudesma-3, 7-diene, the form of the extract varies depending on the process used, it may be liquid, a clear amber solid, a sticky semisolid substance, or a brittle, honeycombed solid. Hash oil is consumed usually by smoking, ingestion, or vaporization, smoking or vaporizing hash oil is known colloquially as dabbing, from the English verb to daub, to smear with something adhesive. Dabbing devices include special kinds of pipes, and vaporizers similar in design to electronic cigarettes. Oil rigs include a water pipe and a hollow tube. The pipe is heated with a blowtorch rather than a cigarette lighter. Hash oil is produced by solvent extraction of marijuana and/or hashish, after filtering and evaporating the solvent, a sticky resinous dank liquid with a strong herbal odor remains. Fresh, undried plant material is less suited for hash oil production, because much THC and CBD will be present in their carboxylic acid forms, the acids are decarboxylated during drying and heating. Fresh, undried plant material is best suited for concrete production, a wide variety of solvents can be used for extraction, such as chloroform, dichloromethane, petroleum ether, naphtha, benzene, butane, methanol, ethanol, isopropanol, and olive oil. Currently, resinoids are often obtained by extraction with carbon dioxide. The alcohols extract undesirable water-soluble substances such as chlorophylls and sugars, non-polar solvents such as benzene, chloroform and petroleum ether will not extract the water-soluble constituents of marijuana or hashish, and will yield a somewhat more potent oil as a result. In general, non-polar cannabis extracts taste much better than polar extracts, alkali washing further improves the odor and taste. This process reduces the oil yield, but the oil is less acidic, easier digestible. Process 2) consists of dissolving the oil in a solvent such as absolute ethanol containing 0. 05% hydrochloric acid
25.
Legality of cannabis by country
–
The legality of cannabis for general or recreational use varies from country to country. Possession of cannabis is illegal in most countries as a result of the agreement about Indian hemp, also known as hashish, however, many countries have decriminalized the possession of small quantities of cannabis, see the list below. In the United States, medical cannabis is allowed by state, territorial, Indian reservation, and District of Columbia law. While federal law is controlling, the Obama administration has not to prosecute users operating in compliance with local medical and recreational marijuana laws. S
26.
Weed
–
A weed is a plant considered undesirable in a particular situation, a plant in the wrong place. Examples commonly are plants unwanted in human-controlled settings, such as fields, gardens, lawns. Many plants that people widely regard as weeds also are grown in gardens and other cultivated settings. The term weed also is applied to any plant that grows or reproduces aggressively, Weed control is important in agriculture. Methods include hand cultivation with hoes, powered cultivation with cultivators, smothering with mulch, lethal wilting with high heat, burning, certain classes of weeds share adaptations to ruderal environments. The nature of the habitat and its disturbances will affect or even determine which types of weed communities become dominant. In contrast, perennial weeds often have underground stems that spread under the surface or, like ground ivy, have creeping stems that root. In locations where predation and mutually competitive relationships are absent, weeds have increased resources available for growth and these chemicals may limit the growth of established plants or the germination and growth of seeds and seedlings. A number of native or non-native plants are unwanted in a location for a number of reasons. An important one is that they interfere with food and fiber production in agriculture, other important reasons are that they interfere with other cosmetic, decorative, or recreational goals, such as in lawns, landscape architecture, playing fields, and golf courses. Similarly, they can be of concern for environmental reasons whereby introduced species out-compete for resources or space with desired endemic plants, in weed ecology some authorities speak of the relationship between the three Ps, plant, place, perception. These have been variously defined, but the weed traits listed by H. G. Baker are widely cited. Weeds have long been a concern, perhaps as long as humans have cultivated plants, and the Bible, Cursed is the ground because of you, through painful toil you will eat of it all the days of your life. It will produce thorns and thistles for you, and you eat the plants of the field. By the sweat of your brow you will eat your food until you return to the ground, While the term weed generally has a negative connotation, many plants known as weeds can have beneficial properties. A number of weeds, such as the dandelion and lambs quarter, are edible, burdock is common over much of the world, and is sometimes used to make soup and medicine in East Asia. Some weeds attract beneficial insects, which in turn can protect crops from harmful pests, Weeds can also prevent pest insects from finding a crop, because their presence disrupts the incidence of positive cues which pests use to locate their food. Weeds may also act as a mulch, providing ground cover that reduces moisture loss
27.
Dhaulagiri
–
The Dhaulagiri massif in Nepal extends 120 km from the Kaligandaki River west to the Bheri. This massif is bounded on the north and southwest by tributaries of the Bheri River, Dhaulagiri I is the seventh highest mountain in the world at 8,167 metres above sea level. It was first climbed on May 13,1960 by a Swiss/Austrian/Nepali expedition, the mountains name is धौलागिरी in Nepali. This comes from Sanskrit where धवल means dazzling, white, beautiful, Dhaulagiri I is also the highest point of the Gandaki river basin. Annapurna I is 34 km. east of Dhaulagiri I, the Kali Gandaki River flows between the two in the Kaligandaki Gorge, said to be the worlds deepest. The town of Pokhara is south of the Annapurnas, an important regional center, in 1808 A. D. survey computations showed it to be the highest mountain yet surveyed. This lasted until 1838 when Kangchenjunga took its place, followed by Mount Everest in 1858, Dhaulagiri Is sudden rise from lower terrain is almost unequaled. It rises 7,000 m from the Kali Gandaki River 30 km to the southeast, the south and west faces rise precipitously over 4,000 m. The south face of Gurja Himal in the massif is also notably immense. Most ascents have followed the northeast ridge route of the first ascent, as of 2007 there had been 358 successful ascents and 58 fatalities. Between 1950 and 2006,2. 88% of 2,016 expedition members and staff going above base camp on Dhaulagiri I died. On all 8,000 metre peaks in Nepal the death rate was 1. 63%,1950 – Dhaulagiri I reconnoitered by a French expedition led by Maurice Herzog. They do not see a feasible route and switch to Annapurna, 1953–1958 – Five expeditions attempt the north face, or Pear Buttress, route. 1959 – Austrian expedition led by Fritz Moravec makes the first attempt on the northeast ridge. 1960 – Swiss-Austrian expedition led by Max Eiselin, successful ascent by Kurt Diemberger, P. Diener, E. Forrer, A. Schelbert, Nyima Dorje Sherpa, Nawang Dorje Sherpa on May 13. First Himalayan climb supported by an aircraft, which eventually crashed in Hidden Valley north of the mountain during takeoff and was abandoned. 1969 – American team led by Boyd Everett attempt southeast ridge, seven team members,1970 – second ascent, via the northeast ridge by a Japanese expedition led by Tokufu Ohta and Shoji Imanari. Tetsuji Kawada and Lhakpa Tenzing Sherpa reach the summit,1973 – American team led by James Morrissey makes third ascent via the northeast ridge
28.
Nepal
–
Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked central Himalayan country in South Asia. Nepal is divided into 7 provinces and 75 districts and 744 local units including 4 metropolises,13 sub-metropolises,246 municipal councils and 481 village and it has a population of 26.4 million and is the 93rd largest country by area. Bordering China in the north and India in the south, east, Nepal does not border Bangladesh, which is located within only 27 km of its southeastern tip. It neither borders Bhutan due to the Indian state of Sikkim being located in between, Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the worlds ten tallest mountains, including Mount Everest, the highest point on Earth. Kathmandu is the capital and largest city. It is a nation with Nepali as the official language. The territory of Nepal has a history since the Neolithic age. The name Nepal is first recorded in texts from the Vedic Age, the era which founded Hinduism, in the middle of the first millennium BCE, Gautama Buddha, the founder of Buddhism, was born in southern Nepal. Parts of northern Nepal were intertwined with the culture of Tibet, the Kathmandu Valley in central Nepal became known as Nepal proper because of its complex urban civilization. It was the seat of the prosperous Newar confederacy known as Nepal Mandala, the Himalayan branch of the ancient Silk Road was dominated by the valleys traders. The cosmopolitan region developed distinct traditional art and architecture, by the 18th century, the Gorkha Kingdom achieved the unification of Nepal. The Shah dynasty established the Kingdom of Nepal and later formed an alliance with the British Empire, the country was never colonized but served as a buffer state between Imperial China and Colonial India. In the 20th century, Nepal ended its isolation and forged ties with regional powers. Parliamentary democracy was introduced in 1951, but was suspended by Nepalese monarchs in 1960 and 2005. The Nepalese Civil War resulted in the proclamation of a republic in 2008, modern Nepal is a federal secular parliamentary republic. Nepal is a nation, ranking 144th on the Human Development Index in 2016. The country struggles with the transition from a monarchy to a republic and it also suffers from high levels of hunger and poverty. Despite these challenges, Nepal is making progress, with the government declaring its commitment to elevate the nation from least developed country status by 2022
29.
Thicket
–
A thicket is a very dense stand of trees or tall shrubs, often dominated by only one or a few species, to the exclusion of all others. They may be formed by species that shed large numbers of viable seeds that are able to germinate in the shelter of the maternal plants. In some conditions the formation or spread of thickets may be assisted by human disturbance of an area, where a thicket is formed of briar, which is a common name for any of a number of unrelated thorny plants, it may be called a briar patch. Plants termed briar include species in the genera Rosa, Rubus, and Smilax
30.
Islamabad
–
Islamabad is the capital city of Pakistan located within the federal Islamabad Capital Territory. The city is the seat of Pakistan and is administered by the Islamabad Metropolitan Corporation. Islamabad is located in the Pothohar Plateau in the part of the country. The region has historically been a part of the crossroads of Punjab, Islamabad was built during the 1960s to replace Karachi as Pakistans capital. The city is known for the presence of several parks and forests, including the Margalla Hills National Park, the city is home several landmarks, including the Faisal Mosque, the largest mosque in South Asia and the fourth largest in the world. Other landmarks include the Pakistans National Monument and Democracy Square, Islamabad is a gamma+ world city, it is categorised as very high on the Human Development Index, the highest in the country. The city has the highest cost of living in Pakistan, and its population is dominated by middle, the city is home to sixteen universities, including the Quaid-e-Azam University and NUST. The city is one of the safest in Pakistan, and has a surveillance system with 1,900 CCTV cameras. The name of the city, Islamabad is derived from two words, Islam and abad, meaning City of Islam, Islam is an Arabic word which refers to the religion of Islam and -abad is a Persian place name that means inhabited place or city. Islamabad Capital Territory, located on the Pothohar Plateau of the Punjab region, is considered one of the earliest sites of settlement in Asia. Some of the earliest Stone Age artefacts in the world have found on the plateau. Rudimentary stones recovered from the terraces of the Soan River testify to the endeavours of early man in the inter-glacial period, items of pottery and utensils dating back to prehistory have been found. Excavations have revealed evidence of a prehistoric culture, one end of the Indus Valley Civilization flourished here between the 23rd and 18th centuries BC. Later the area was a settlement of the Aryan community. A Buddhist town once existed in the region, many great armies such as those of Zahiruddin Babur, Genghis Khan, Timur and Ahmad Shah Durrani used the corridor through Islamabad on their way to invade the rest of the Indian Subcontinent. Modern Islamabad is based on the old settlement known as Saidpur, the British took control of the region from the Sikhs in 1849 and built South Asias largest cantonment in the region. When Pakistan gained independence in 1947, the port city of Karachi was its first national capital. In the 1960s, Islamabad was constructed as a capital for several reasons
31.
Pakistan
–
Pakistan, officially the Islamic Republic of Pakistan, is a federal parliamentary republic in South Asia on the crossroads of Central Asia and Western Asia. It is the sixth-most populous country with a population exceeding 200 million people, in terms of area, it is the 33rd-largest country in the world with an area covering 881,913 square kilometres. It is separated from Tajikistan by Afghanistans narrow Wakhan Corridor in the north, Pakistan is unique among Muslim countries in that it is the only country to have been created in the name of Islam. As a result of the Pakistan Movement led by Muhammad Ali Jinnah and it is an ethnically and linguistically diverse country, with a similarly diverse geography and wildlife. Initially a dominion, Pakistan adopted a constitution in 1956, becoming an Islamic republic, an ethnic civil war in 1971 resulted in the secession of East Pakistan as the new country of Bangladesh. The new constitution stipulated that all laws were to conform to the injunctions of Islam as laid down in the Quran. Pakistan has an economy with a well-integrated agriculture sector. The Pakistani economy is the 24th-largest in the world in terms of purchasing power and it is ranked among the emerging and growth-leading economies of the world, and is backed by one of the worlds largest and fastest-growing middle classes. The post-independence history of Pakistan has been characterised by periods of military rule, the country continues to face challenging problems such as illiteracy, healthcare, and corruption, but has substantially reduced poverty and terrorism and expanded per capita income. It is also a member of CERN. Pakistan is a signatory to the Kyoto Protocol, the Paris Agreement, the name Pakistan literally means land of the pure in Urdu and Persian. It is a play on the word pāk meaning pure in Persian and Pashto, the letter i was incorporated to ease pronunciation and form the linguistically correct and meaningful name. Some of the earliest ancient human civilisations in South Asia originated from areas encompassing present-day Pakistan, the earliest known inhabitants in the region were Soanian during the Lower Paleolithic, of whom stone tools have been found in the Soan Valley of Punjab. The Vedic Civilization, characterised by Indo-Aryan culture, laid the foundations of Hinduism, Multan was an important Hindu pilgrimage centre. The Vedic civilisation flourished in the ancient Gandhāran city of Takṣaśilā, the Indo-Greek Kingdom founded by Demetrius of Bactria included Gandhara and Punjab and reached its greatest extent under Menander, prospering the Greco-Buddhist culture in the region. Taxila had one of the earliest universities and centres of education in the world. At its zenith, the Rai Dynasty of Sindh ruled this region, the Pala Dynasty was the last Buddhist empire, which, under Dharampala and Devapala, stretched across South Asia from what is now Bangladesh through Northern India to Pakistan. The Arab conqueror Muhammad bin Qasim conquered the Indus valley from Sindh to Multan in southern Punjab in 711 AD, the Pakistan governments official chronology identifies this as the time when the foundation of Pakistan was laid
32.
Annual plant
–
An annual plant is a plant that completes its life cycle, from germination to the production of seed, within one year, and then dies. Summer annuals germinate during spring or early summer and mature by autumn of the same year, winter annuals germinate during the autumn and mature during the spring or summer of the following calendar year. One seed-to-seed life cycle for an annual can occur in as little as a month in some species, oilseed rapa can go from seed-to-seed in about five weeks under a bank of fluorescent lamps. This style of growing is used in classrooms for education. Many desert annuals are therophytes, because their life cycle is only weeks. In cultivation, many plants are, or are grown as, annuals. Some perennials and biennials are grown in gardens as annuals for convenience, carrot, celery and parsley are true biennials that are usually grown as annual crops for their edible roots, petioles and leaves, respectively. Tomato, sweet potato and bell pepper are tender perennials usually grown as annuals, ornamental perennials commonly grown as annuals are impatiens, wax begonia, snapdragon, Pelargonium, coleus and petunia. Examples of true annuals include corn, wheat, rice, lettuce, peas, watermelon, beans, zinnia, summer annuals sprout, flower, produce seed, and die, during the warmer months of the year. The lawn weed crabgrass is a summer annual, winter annuals germinate in autumn or winter, live through the winter, then bloom in winter or spring. The plants grow and bloom during the season when most other plants are dormant or other annuals are in seed form waiting for warmer weather to germinate. Winter annuals die after flowering and setting seed, the seeds germinate in the autumn or winter when the soil temperature is cool. Winter annuals typically grow low to the ground, where they are sheltered from the coldest nights by snow cover. Some common winter annuals include henbit, deadnettle, chickweed, ironically, the property that they prevent the soil from drying out can also be problematic for commercial agriculture. In 2008, it was discovered that the inactivation of only two genes in one species of annual plant leads to the conversion into a perennial plant, researchers deactivated the SOC1 and FUL genes in Arabidopsis thaliana, which control flowering time. This switch established phenotypes common in plants, such as wood formation
33.
Dioecy
–
Dioecy is a characteristic of a species, meaning that it has distinct male and female individual organisms or colonies, meaning that a colony contains only either male or female individuals. Dioecy is one method that excludes self-fertilization and promotes allogamy, flowering plants have several other methods of excluding self-fertilization, called Self-incompatibility. In zoology, dioecious species may be opposed to hermaphroditic species, meaning that an individual is of one sex. Dioecy may also describe colonies, such as the colonies of Siphonophorae, Dioecious colonies contain members of only one sex, whereas monoecious colonies contain members of both sexes. Dioecious species have the male and female structures on separate plants. The meaning of male and female in the context of plants is different from that used in animal groups and this issue is discussed below in the Alternation of generations section. About 6 percent of species are entirely dioecious and about 7% of angiosperm genera contain some dioecious species. Examples of dioecious plant species include ginkgos, willows, cannabis, more examples of dioecious plants can be found in the Wikipedia category, Dioecious plants. Dioecy occurs in a variety of plant families. However it is common in woody plants and heterotrophic species. There are several alternatives to dioecy for sexual reproductive structure organization in plants including bisexual flowers and these are described at Plant reproductive morphology. Land plants have alternation of generations, for which the sporophyte produces spores rather than gametes. Strictly speaking, the sporophytes of plants do not have either male or female reproductive organs. The gametophytes of flowering plants are of a sex, the male gametophytes are contained within the pollen. The sporophyte generation is called dioecious when each sporophyte has only one kind of spore-producing organ whose spores ultimately give rise to all male gametes or all female gametes. Slightly different terms, dioicous and monoicous, may be used for the gametophyte generation, the definition avoids reference to male and female reproductive structures, which are rare in fungi. An individual of a fungal species not only requires a partner for mating. A monoecious fungal species can perform roles, but may not be self-compatible
34.
Herb
–
In general use, herbs are any plants used for food, flavoring, medicine, or fragrances for their savory or aromatic properties. Culinary use typically distinguishes herbs from spices, Herbs refers to the leafy green or flowering parts of a plant, while spices are produced from other parts of the plant, including seeds, berries, bark, roots and fruits. In botanical English, the herb is also used as a synonym of herbaceous plant. Herbs have a variety of uses including culinary, medicinal, and in some cases, general usage of the term herb differs between culinary herbs and medicinal herbs. In medicinal or spiritual use any of the parts of the plant might be considered herbs, including leaves, roots, flowers, seeds, root bark, inner bark, resin and pericarp. The word herb is pronounced /ˈhɜːrb/ in the UK, but /ˈɜːrb/ is common among North American speakers, as far back as 5000 BCE, Sumerians used herbs in medicine. Ancient Egyptians used fennel, coriander and thyme around 1555 BCE, in ancient Greece, in 162 CE, a physician by the name of Galen was known for concocting complicated herbal remedies that contained up to 100 ingredients. Culinary herbs are distinguished from vegetables in that, like spices, they are used in small amounts, Herbs can be perennials such as thyme or lavender, biennials such as parsley, or annuals like basil. Perennial herbs can be such as rosemary, Rosmarinus officinalis, or trees such as bay laurel, Laurus nobilis – this contrasts with botanical herbs. Some plants are used as herbs and spices, such as dill weed and dill seed or coriander leaves and seeds. Also, there are some such as those in the mint family that are used for both culinary and medicinal purposes. Some plants contain phytochemicals that have effects on the body, there may be some effects when consumed in the small levels that typify culinary spicing, and some herbs are toxic in larger quantities. For instance, some types of herbal extract, such as the extract of St. Johns-wort or of kava can be used for purposes to relieve depression. However, large amounts of these herbs may lead to toxic overload that may involve complications, some of a serious nature, Herbs have long been used as the basis of traditional Chinese herbal medicine, with usage dating as far back as the first century CE and far before. In India, the Ayurveda medicinal system is based on herbs, medicinal use of herbs in Western cultures has its roots in the Hippocratic elemental healing system, based on a quaternary elemental healing metaphor. Famous herbalist of the Western tradition include Avicenna, Galen, Paracelsus, Culpepper, the indigenous peoples of Australia developed herbal medicine based on plants that were readily available to them. The isolation of the people meant the remedies developed were for far less serious diseases. Herbs such as mint, wattle and eucalyptus were used for coughs, diarrhea, fever
35.
Leaf
–
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot, Leaves are collectively referred to as foliage, as in autumn foliage. Although leaves can be seen in different shapes, sizes and textures, typically a leaf is a thin, dorsiventrally flattened organ, borne above ground. Most leaves have distinctive upper surface and lower surface that differ in colour, hairiness, broad, flat leaves with complex venation are known as megaphylls and the species that bear them, the majority, as broad-leaved or megaphyllous plants. In others, such as the clubmosses, with different evolutionary origins, some leaves, such as bulb scales are not above ground, and in many aquatic species the leaves are submerged in water. Succulent plants often have thick juicy leaves, but some leaves are without major photosynthetic function and may be dead at maturity, as in some cataphylls, furthermore, several kinds of leaf-like structures found in vascular plants are not totally homologous with them. Examples include flattened plant stems called phylloclades and cladodes, and flattened leaf stems called phyllodes which differ from both in their structure and origin. Many structures of plants, such as the phyllids of mosses and liverworts and even of some foliose lichens. Leaves are the most important organs of most vascular plants and these are then further processed by chemical synthesis into more complex organic molecules such as cellulose, the basic structural material in plant cell walls. The plant must therefore bring these three together in the leaf for photosynthesis to take place. Once sugar has been synthesized, it needs to be transported to areas of growth such as the plant shoots and roots. Vascular plants transport sucrose in a tissue called the phloem. The phloem and xylem are parallel to each other but the transport of materials is usually in opposite directions. Within the leaf these vascular systems branch to form veins which supply as much as the leaf as possible and they are arranged on the plant so as to expose their surfaces to light as efficiently as possible without shading each other, but there are many exceptions and complications. For instance plants adapted to windy conditions may have pendent leaves, such as in many willows, the flat, or laminar, shape also maximises thermal contact with the surrounding air, promoting cooling. Functionally, in addition to photosynthesis the leaf is the site of transpiration and guttation. Many gymnosperms have thin needle-like or scale-like leaves that can be advantageous in cold climates with frequent snow and these are interpreted as reduced from megaphyllous leaves of their Devonian ancestors. For xerophytes the major constraint is not light flux or intensity, some window plants such as Fenestraria species and some Haworthia species such as Haworthia tesselata and Haworthia truncata are examples of xerophytes. and Bulbine mesembryanthemoides
36.
Glossary of leaf morphology
–
The following is a defined list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple or compound, the edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines. For more terms describing other aspects of leaves besides their overall morphology see the leaf article, leaves of most plants include a flat structure called the blade or lamina, but not all leaves are flat, some are cylindrical. Leaves may be simple, with a leaf blade, or compound. In flowering plants, as well as the blade of the leaf, there may be a petiole and stipules, leaf structure is described by several terms that include, Being one of the more visible features, leaf shape is commonly used for plant identification. Edge and margin are both interchangeable in the sense that they refer to the perimeter of a leaf. Leaves may also be folded or rolled in various ways, the folding of leaves within a bud is vernation, ptyxis is the folding of an individual leaf in a bud
37.
Leaflet (botany)
–
A leaflet in botany is a leaf-like part of a compound leaf. Though it resembles a leaf, a leaflet is not borne on a main plant stem or branch, as a leaf is. Compound leaves are common in many plant families and they differ widely in morphology, the two main classes of compound leaf morphology are palmate and pinnate. For example, a plant has palmate compound leaves, whereas some species of Acacia have pinnate leaves. The ultimate free division of a leaf, or a pinnate subdivision of a multipinnate leaf is called a pinnule or pinnula
38.
Phyllotaxis
–
In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a class of patterns in nature. The basic arrangements of leaves on a stem are opposite, or alternate = spiral, leaves may also be whorled if several leaves arise, or appear to arise, from the same level on a stem. This arrangement is unusual on plants except for those with particularly short internodes. Examples of trees with whorled phyllotaxis are Brabejum stellatifolium and the related Macadamia genus, with an opposite leaf arrangement, two leaves arise from the stem at the same level, on opposite sides of the stem. An opposite leaf pair can be thought of as a whorl of two leaves, with an alternate pattern, each leaf arises at a different point on the stem. Examples include various bulbous plants such as Boophone and it also occurs in other plant habits such as those of Gasteria or Aloe seedlings, and also in some mature Aloe species such as Aloe plicatilis. In an opposite pattern, if successive leaf pairs are 90 degrees apart and it is common in members of the family Crassulaceae Decussate phyllotaxis also occurs in the Aizoaceae. A whorl can occur as a structure where all the leaves are attached at the base of the shoot. A basal whorl with a number of leaves spread out in a circle is called a rosette. A repeating spiral can be represented by a fraction describing the angle of windings leaf per leaf, alternate distichous leaves will have an angle of 1/2 of a full rotation. In beech and hazel the angle is 1/3, in oak and apricot it is 2/5, in sunflowers, poplar, and pear, it is 3/8, the numerator and denominator normally consist of a Fibonacci number and its second successor. The number of leaves is called rank, in the case of simple Fibonacci ratios. With larger Fibonacci pairs, the pattern becomes complex and non-repeating and this tends to occur with a basal configuration. Examples can be found in flowers and seed heads. The most famous example is the sunflower head and this phyllotactic pattern creates an optical effect of criss-crossing spirals. In the botanical literature, these designs are described by the number of counter-clockwise spirals and these also turn out to be Fibonacci numbers. In some cases, the appear to be multiples of Fibonacci numbers because the spirals consist of whorls
39.
Anemophily
–
Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Almost all gymnosperms are anemophilous, as are plants in the order Poales. Other common anemophilous plants are oaks, sweet chestnuts, alders and members of the family Juglandaceae, features of the wind-pollination syndrome include a lack of scent production, a lack of showy floral parts, reduced production of nectar, and the production of enormous numbers of pollen grains. This distinguishes them from entomophilous and zoophilous species, anemophilous pollen grains are light and non-sticky, so that they can be transported by air currents. They are typically 20–60 micrometres in diameter, although the pollen grains of Pinus species can be much larger, anemophilous plants possess well-exposed stamens so that the pollens are exposed to wind currents and also have large and feathery stigma to easily trap airborne pollen grains. Pollen from anemophilous plants tends to be smaller and lighter than pollen from entomophilous ones, however, insects sometimes gather pollen from staminate anemophilous flowers at times when higher-protein pollens from entomophilous flowers are scarce. Anemophilous pollens may also be captured by bees electrostatic field. This may explain why, though bees are not observed to visit ragweed flowers, anemophily is an adaptation that helps to separate the male and female reproductive systems of a single plant, reducing the effects of inbreeding. It often accompanies dioecy – the presence of male and female structures on separate plants. Almost all pollens that are allergens are from anemophilous species, grasses are the most important producers of aeroallergens in most temperate regions, with lowland or meadow species producing more pollen than upland or moorland species. Media related to Wind pollination at Wikimedia Commons
40.
Achene
–
An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes contain a seed that nearly fills the pericarp. In many species, what is called the seed is an achene, the seed-like appearance is owed to the hardening of the wall of the seed-vessel, which encloses the solitary seed so closely as to seem like an outer coat. The fruits of buttercup, buckwheat, and cannabis are typical achenes, the achenes of the strawberry are sometimes mistaken for seeds. The strawberry is a fruit with an aggregate of achenes. Each fruit, called a hip, holds a few achenes. A winged achene, such as in maple, is called a samara, some achenes have accessory hair-like structures that cause them to tumble in the wind in a manner similar to a tumbleweed. This type sometimes is called a fruit or diaspore. A caryopsis or grain is a type of fruit that resembles an achene. An utricle is like an achene, but the fruit is bladder-like or inflated, fruits of sedges are sometimes considered achenes although their one-locule ovary is a compound ovary. The fruit of the family Asteraceae is also so similar to an achene that it is considered to be one. A special term for the Asteraceae fruit is cypsela, for example, the white-gray husks of a sunflower seed are the walls of the cypsela fruit. Many cypselas have calyx tissue attached that functions in biological dispersal of the seed
41.
Photoperiodism
–
Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals, Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods. Many flowering plants use a protein, such as phytochrome or cryptochrome, to sense seasonal changes in night length, or photoperiod. Phytochromes are signaling proteins that promote photomorphogenesis in response to red light, there are two forms of phytochromes, red light absorbing, Pr, and far-red light absorbing, Pfr. Pfr, which is the form of phytochromes, can be reverted to Pr. There are five genes that encode phytochromes in the Arabidopsis thaliana genetic model, PHYA is the gene that is involved in the regulation of photomorphogenesis in response to far-red light. PHYB is the gene that is involved in regulating photoreversible seed germination in response to red light, PHYC mediates the response between PHYA and PHYB. PHYD and PHYE mediate elongation of the internode and control the time in which the plant flowers, cryptochromes are blue-light photoreceptors that regulate responses to blue light. There are two different forms of crytochromes, CRY1 and CRY2, which regulate the inhibition of hypocotyl elongation in response to blue light, the combination of phytochromes and cryptochromes mediate growth and the flowering of plants in response to red light, far-red light, and blue light. Along with long-day plants and short-day plants, there are plants that fall into a dual-day length category and these plants are either long-short-day plants or short-long-day plants. LSDPs flower after a series of days followed by short days whereas SLDPs flower after a series of short days followed by long days. Each plant has a different length critical photoperiod, or critical night length, other than flowering, photoperiodism in plants includes the growth of stems or roots during certain seasons and the loss of leaves. Artificial lighting can be used to induce extra-long days, long-day plants flower when the night length falls below their critical photoperiod. These plants typically flower in the northern hemisphere during late spring or early summer as days are getting longer, in the northern hemisphere, the longest day of the year is on or about 21 June. After that date, days grow shorter until 21 December and this situation is reversed in the southern hemisphere. Natural nighttime light, such as moonlight or lightning, is not of sufficient brightness or duration to interrupt flowering, in general, short-day plants flower as days grow shorter after 21 June in the northern hemisphere, which is during summer or fall. The length of the period required to induce flowering differs among species and varieties of a species. Photoperiodism affects flowering by inducing the shoot to produce floral buds instead of leaves, some short-day facultative plants are, Marijuana Cotton Rice Jowar Green Gram Soybeans Day-neutral plants, such as cucumbers, roses, and tomatoes, do not initiate flowering based on photoperiodism
42.
Plant reproductive morphology
–
Plant reproductive morphology is the study of the physical form and structure of those parts of plants directly or indirectly concerned with sexual reproduction. Among all living organisms, flowers, which are the structures of angiosperms, are the most varied physically. Plants that are not flowering plants also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction, christian Konrad Sprengel studied the reproduction of flowering plants and for the first time it was understood that the pollination process involved both biotic and abiotic interactions. Charles Darwins theories of natural selection utilized this work to build his theory of evolution, Plants have complex lifecycles involving alternation of generations. One generation, the sporophyte, gives rise to the next generation asexually via spores, spores may be identical isospores or come in different sizes, but strictly speaking, spores and sporophytes are neither male nor female because they do not produce gametes. The alternate generation, the gametophyte, produces gametes, eggs and/or sperm, a gametophyte can be be monoicous, producing both eggs and sperm or dioicous, either female or male. In the bryophytes, the gametophyte is the dominant generation. In ferns and seed plants the sporophyte is the dominant generation, the obvious visible plant, whether a small herb or a large tree, is the sporophyte, and the gametophyte is very small. In seed plants, each female gametophyte, and the spore that gives rise to it, is hidden within the sporophyte and is dependent on it for nutrition. Each male gametophyte consists of from two to four cells enclosed within the protective wall of a pollen grain. The sporophyte of a plant is often described using sexual terms based on the sexuality of the gametophyte it gives rise to. For example, a sporophyte that produces spores that give rise only to male gametophytes may be described as male, even though the sporophyte itself is asexual, producing only spores. Similarly, flowers produced by the sporophyte may be described as unisexual or bisexual, the flower is the characteristic structure concerned with sexual reproduction in flowering plants. Flowers vary enormously in their construction, a complete flower, like that of Ranunculus glaberrimus shown in the figure, has a calyx of outer sepals and a corolla of inner petals. The sepals and petals form the perianth. Next inwards there are numerous stamens, which produce pollen grains, stamens may be called the male parts of a flower and collectively form the androecium. Finally in the middle there are carpels, which at maturity one or more ovules. Carpels may be called the parts of a flower and collectively form the gynoecium
43.
Flower
–
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in plants that are floral. The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs, Flowers may facilitate outcrossing or allow selfing. Some flowers produce diaspores without fertilization, Flowers contain sporangia and are the site where gametophytes develop. Many flowers have evolved to be attractive to animals, so as to them to be vectors for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds, the essential parts of a flower can be considered in two parts, the vegetative part, consisting of petals and associated structures in the perianth, and the reproductive or sexual parts. A stereotypical flower consists of four kinds of structures attached to the tip of a short stalk, each of these kinds of parts is arranged in a whorl on the receptacle. The four main whorls are as follows, Collectively the calyx, corolla, the next whorl toward the apex, composed of units called petals, which are typically thin, soft and colored to attract animals that help the process of pollination. Androecium, the whorl, consisting of units called stamens. Stamens consist of two parts, a called a filament, topped by an anther where pollen is produced by meiosis. Gynoecium, the innermost whorl of a flower, consisting of one or more units called carpels, the carpel or multiple fused carpels form a hollow structure called an ovary, which produces ovules internally. Ovules are megasporangia and they in turn produce megaspores by meiosis which develop into female gametophytes and these give rise to egg cells. The gynoecium of a flower is described using an alternative terminology wherein the structure one sees in the innermost whorl is called a pistil. A pistil may consist of a carpel or a number of carpels fused together. The sticky tip of the pistil, the stigma, is the receptor of pollen, the supportive stalk, the style, becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma. The relationship to the gynoecium on the receptacle is described as hypogynous, perigynous, although the arrangement described above is considered typical, plant species show a wide variation in floral structure. These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species, the four main parts of a flower are generally defined by their positions on the receptacle and not by their function. Many flowers lack some parts or parts may be modified into other functions and/or look like what is typically another part, in some families, like Ranunculaceae, the petals are greatly reduced and in many species the sepals are colorful and petal-like. Other flowers have modified stamens that are petal-like, the flowers of Peonies and Roses are mostly petaloid stamens
44.
Stamen
–
The stamen is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium, a stamen typically consists of a stalk called the filament and an anther which contains microsporangia. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the area of the anther. The sterile tissue between the lobes is called the connective, a pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are called the androecium. The androecium can consist of as few a one-half stamen as in Canna species or as many as 3,482 stamens which have been counted in Carnegiea gigantea, the androecium in various species of plants forms a great variety of patterns, some of them highly complex. It surrounds the gynoecium and is surrounded by the perianth, a few members of the family Triuridaceae, particularly Lacandonia schismatica, are exceptional in that their gynoecia surround their androecia. Stamen is the Latin word meaning thread, depending on the species of plant, some or all of the stamens in a flower may be attached to the petals or to the floral axis. They also may be free-standing or fused to one another in different ways, including fusion of some. The filaments may be fused and the free, or the filaments free. Rather than there being two locules, one locule of a stamen may fail to develop, or alternatively the two locules may merge late in development to give a single locule, a typical anther contains four microsporangia. The microsporangia form sacs or pockets in the anther, the two separate locules on each side of an anther may fuse into a single locule. Each microsporangium is lined with a tissue layer called the tapetum. These undergo meiosis to form haploid spores, the spores may remain attached to each other in a tetrad or separate after meiosis. Each microspore then divides mitotically to form an immature microgametophyte called a pollen grain, the pollen is eventually released when the anther forms openings. These may consist of longitudinal slits, pores, as in the family, or by valves. More commonly, mature pollen grains separate and are dispensed by wind or water, pollinating insects, pollen of angiosperms must be transported to the stigma, the receptive surface of the carpel, of a compatible flower, for successful pollination to occur. After arriving, the pollen grain typically completes its development and it may grow a pollen tube and undergoing mitosis to produce two sperm nuclei
45.
Gynoecium
–
Gynoecium is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of pistils in a flower and is surrounded by the pollen-producing reproductive organs. The term gynoecium is also used by botanists to refer to a cluster of archegonia and any associated modified leaves or stems present on a shoot in mosses. The corresponding terms for the parts of those plants are clusters of antheridia within the androecium. Flowers that bear a gynoecium but no stamens are called carpellate, flowers lacking a gynoecium are called staminate. The gynoecium is often referred to as female because it gives rise to female gametophytes, however, strictly speaking sporophytes do not have a sex, only gametophytes do. Gynoecium development and arrangement is important in research and identification of angiosperms. The gynoecium may consist of one or more separate pistils, a pistil typically consists of an expanded basal portion called the ovary, an elongated section called a style and an apical structure that receives pollen called a stigma. The ovary, is the basal portion which contains placentas. The placentas and/or ovule may be born on the gynoecial appendages or less frequently on the floral apex, the chamber in which the ovules develop is called a locule. The style, is a pillar-like stalk through which pollen tubes grow to reach the ovary, some flowers such as Tulipa do not have a distinct style, and the stigma sits directly on the ovary. The style is a tube in some plants such as lilies. The stigma, is found at the tip of the style. It is commonly sticky or feathery to capture pollen, the word pistil comes from Latin pistillum meaning pestle. A sterile pistil in a flower is referred to as a pistillode. The pistils of a flower are considered to be composed of carpels, a carpel is a theoretical construct interpreted as modified leaves bearing structures called ovules, inside which the egg cells ultimately form. A pistil may consist of one carpel, with its ovary, style and stigma, or several carpels may be joined together with a single ovary, the gynoecium may consist of one or more uni-carpellate pistils, or of one multi-carpellate pistil. The number of carpels is described by such as tricarpellate
46.
Erya
–
The Erya or Erh-ya is the oldest surviving Chinese dictionary or Chinese encyclopedia known. Bernhard Karlgren concluded that the part of its glosses must reasonably date from the 3rd century BC. Chinese scholars interpret the first title character ěr as a loan character for the homophonous ěr. South Coblin, The interpretation of the title as something like approaching what is correct, proper and it has been translated as The Literary Expositor or The Ready Rectifier, Progress Towards Correctness, and The Semantic Approximator. Joseph Needham et al.325 BCE onwards, and the text was enlarged and stabilized during the Qin and Western Han dynasty. Most of these texts about the Erya were still extant in the Tang dynasty but had disappeared by the Song dynasty, the Northern Song dynasty scholar Xing Bing wrote the Erya shu, which quoted many descriptions from both ordinary literature and medicinal bencao texts. A century later, Lu Dian wrote the Piya and the Erya Xinyi commentary, the Southern Song dynasty scholar Luo Yuan subsequently wrote the Eryayi interpretation. During the Qing Dynasty, Shao Jinhan published the Erya Zhengyi, in the history of Chinese lexicography, nearly all dictionaries were collated by graphic systems of character radicals, first introduced in the Shuowen Jiezi. However, a few exceptions, called yashu 雅書 ya-type books, adopted collation by semantic categories such as Heaven. The Ming Dynasty scholar Lang Kuijin categorized and published the Wuya, Erya, Xiao Erya, Yiya, Guangya, Chinese leishu encyclopedias, such as the Yongle Encyclopedia, were also semantically arranged. Needham takes the Eryas derivative literature as the line of descent for the encyclopedia in China. The Erya has been described as a dictionary, glossary, synonymicon, thesaurus, Karlgren explains that the book is not a dictionary in abstracto, it is a collection of direct glosses to concrete passages in ancient texts. The received text contains 2094 entries, covering about 4300 words, and it is divided into nineteen sections, the first of which is subdivided into two parts. The title of each chapter combines shi with a term describing the words under definition, seven chapters are organized into taxonomies. For instance, chapter 4 defines terms for, paternal clan, maternal relatives, wifes relatives, the text is divided between the first three heterogeneous chapters defining abstract words and the last sixteen semantically-arranged chapters defining concrete words. The last seven – concerning grasses, trees, insects and reptiles, fish, birds, wild animals and it is a notable document of natural history and historical biogeography. Owing to its laconic lexicographical style, the Erya is the only Chinese classic that has not been translated into English. However, there are several unpublished PhD dissertations translating particular chapters, Xiao Erya Shiming Guangya Piya Urra=hubullu, Babylonian glossary Coblin, W. South
47.
Panicle
–
A panicle is a much-branched inflorescence. Some authors distinguish it from a spike, by requiring that the flowers be pedicellate. The branches of a panicle are often racemes, a panicle may have determinate or indeterminate growth. This type of inflorescence is largely characteristic of such as oat and crabgrass, as well as other plants such as pistachio. Botanists use the term paniculate in two ways, having a true panicle inflorescence as well as having an inflorescence with the form but not necessarily the structure of a panicle. A corymb may have a branching structure, with the lower flowers having longer pedicels than the upper. Many species in the Maloideae, such as hawthorns and rowans, thyrse, a branched inflorescence where the main axis has indeterminate growth, and the branches have determinate growth
48.
Raceme
–
A raceme is an unbranched, indeterminate type of inflorescence bearing pedicellate flowers—flowers having short floral stalks called pedicels—along its axis. In botany, an axis means a shoot, in case one bearing the flowers. In indeterminate inflorescence-like racemes, the oldest flowers are borne towards the base and new flowers are produced as the shoot grows, a plant that flowers on a showy raceme may have this reflected in its scientific name, e. g. Cimicifuga racemosa. A compound raceme, also called a panicle, has a main axis. Examples of racemes occur on mustard and radish plants, a spike is an unbranched, indeterminate inflorescence, similar to a raceme, but bearing sessile flowers. Examples occur on Malabar nut and chaff flowers, a true spikelet comprises one or more florets enclosed by two glumes, with flowers and glumes arranged in two opposite rows along the spikelet. Examples occur on rice and wheat, both grasses, an ament or catkin is very similar to a spike or raceme, but with subtending bracts so conspicuous as to conceal the flowers until pollination, as in the pussy–willow, alder, birch. These are sometimes called amentaceous plants, a spadix is a form of spike in which the florets are densely crowded along a fleshy axis, and enclosed by one or more large, brightly–colored bracts called spathes. Usually the female flowers grow at the base, and male flowers grow above and they are a characteristic of the Araceae family, for example jack–in–the–pull it and wild calla. From classical Latin racemus, cluster of grapes
_indica_(right).png)
. PMID 11743084.
Definitions from Wiktionary
Media from Wikimedia Commons
News from Wikinews
Quotations from Wikiquote
Travel guide from Wikivoyage
Data from Wikidata
Taxonomy from Wikispecies
