1.
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
Taxonomy (biology)
–
Title page of
Systema Naturae, Leiden, 1735
Taxonomy (biology)
–
Evolution of the
vertebrates at class level, width of spindles indicating number of families. Spindle diagrams are typical for
Evolutionary taxonomy
Taxonomy (biology)
–
The same relationship, expressed as a
cladogram typical for
cladistics
Taxonomy (biology)
–
Type specimen for
Nepenthes smilesii, a tropical
pitcher plant.
2.
Plantae
–
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
Plantae
–
Green algae from
Ernst Haeckel 's
Kunstformen der Natur, 1904.
Plantae
–
Had'n
Plantae
–
Dicksonia antarctica, a species of
tree fern
Plantae
–
A petrified log in
Petrified Forest National Park.
3.
Angiosperms
–
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
Angiosperms
Angiosperms
–
Bud of a pink
rose
Angiosperms
–
Flowers of
Malus sylvestris (crab apple)
Angiosperms
–
Flowers and leaves of
Oxalis pes-caprae (Bermuda buttercup)
4.
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
Eudicots
–
Eudicots Temporal range:
Early Cretaceous - recent
Eudicots
–
Arabis pollen has three colpi.
5.
Asterids
–
In the APG IV system for the classification of flowering plants, the name asterids denotes a clade. Most of the taxa belonging to this clade had been referred to the Asteridae in the Cronquist system, the name asterids resembles the earlier botanical name but is intended to be the name of a clade rather than a formal ranked name, in the sense of the ICBN. The phylogenetic tree presented hereafter has been proposed by the APG IV project, genetic analysis carried out after APG II maintains that the sister to all other asterids are the Cornales. A second order that split from the base of the asterids are the Ericales, the remaining orders cluster into two clades, the lamiids and the campanulids. The structure of both of these clades has changed in APG III, in APG III system, the following clades were renamed, euasterids I → lamiids euasterids II → campanulids Asterids in Stevens, P. F. Angiosperm Phylogeny Website
Asterids
–
Asterids
Asterids
–
Oregano from Lamiales
6.
Asterales
–
The order is a cosmopolite, and includes mostly herbaceous species, although a small number of trees and shrubs are also present. Asterales are organisms that seem to have evolved from one common ancestor, Asterales share characteristics on morphological and biochemical levels. Synapomorphies include the presence in the plants of oligosaccharide inulin, a nutrient storage molecule used instead of starch, under the Cronquist system of taxonomic classification of flowering plants, Asteraceae was the only family in the group, but newer systems have expanded it to 11. In the classification system of Dahlgren the Asterales were in the superorder Asteriflorae, the order Asterales currently includes 11 families, the largest of which are the Asteraceae, with about 25,000 species, and the Campanulaceae, with about 2,000 species. The remaining families count together for less than 500 species, the phylogenetic tree according to APG III for the Campanulid clade is as below. The core Asterales are Stylidiaceae, APA clade, MGCA clade, other Asterales are Rousseaceae, Campanulaceae and Pentaphragmataceae. All Asterales families are represented in the Southern Hemisphere, however, Asteraceae and Campanulaceae are cosmopolitan, less can be said about the Asterales themselves with certainty, although since several families in Asterales contain trees, the ancestral member is most likely to have been a tree or shrub. Because all clades are represented in the southern hemisphere but many not in the northern hemisphere, Asterales are angiosperms, flowering plants that appeared about 140 million years ago. Asterales contain about 14% of eudicot diversity, however few fossils have been found, of the Menyanthaceae-Asteraceae clade in the Oligocene, about 29 Mya. Fossil evidence of the Asterales is rare and belongs to rather recent epochs, an Oligocene pollen is known for Asteraceae and Goodeniaceae, and seeds from Oligocene and Miocene are known for Menyanthaceae and Campanulaceae respectively. The Asterales, by dint of being a super-set of the family Asteraceae, include some species grown for food, including the sunflower, lettuce, many are also used as spices and traditional medicines. Asterales are common plants and have many known uses, for example, pyrethrum is a natural insecticide with minimal environmental impact. Wormwood, derived from a genus that includes the sagebrush, is used as a source of flavoring for absinthe, despite the large number of species in order Asterales, they do not compare in economic benefit for mankind to the Poales or to the Fabaceae. The Asteraceae include many plant species in North America. W. S. Judd, C. S. Campbell, E. A. Kellogg, P. F. Stevens, plant Systematics, A Phylogenetic Approach, 2nd edition. In, Nature Encyclopedia of Life Sciences, Asterales - Definition and More from the Free Merriam-Webster Dictionary. Dictionary and Thesaurus - Merriam-Webster Online
Asterales
–
Asterales
7.
Asteraceae
–
Asteraceae or Compositae is a very large and widespread family of flowering plants. The family currently has 32,913 accepted species names, in 1,911 genera and 13 subfamilies, in terms of numbers of species, the Asteraceae are rivaled only by the Orchidaceae. Many members have composite flowers in the form of flower heads surrounded by involucral bracts, when viewed from a distance, each capitulum may have the appearance of being a single flower. The name Asteraceae comes from the type genus Aster, from the Greek ἀστήρ, meaning star, Compositae is an older but still valid name which refers to the fact that the family is one of the few angiosperm ones to have composite flowers. Most members of Asteraceae are herbaceous, but a significant number are also shrubs, vines, the family has a worldwide distribution, from the polar regions to the tropics, colonizing a wide variety of habitats. It is most common in the arid and semiarid regions of subtropical, the Asteraceae may represent as much as 10% of autochthonous flora in many regions of the world. Asteraceae is an important family, providing products such as cooking oils, lettuce, sunflower seeds, artichokes, sweetening agents, coffee substitutes. Several genera are of importance, including pot marigold, Calendula officinalis, Echinacea, various daisies, fleabane, chrysanthemums, dahlias, zinnias. Asteraceae are important in medicine, including Grindelia, yarrow. A number of species are considered invasive, including, most notably in North America, dandelion, the name Asteraceae comes to international scientific vocabulary from New Latin, from Aster, the type genus, + -aceae, a standardized suffix for plant family names in modern taxonomy. The genus name comes from the Classical Latin word aster, star, Compositae, an older but still valid name, means composite and refers to the characteristic inflorescence, a special type of pseudanthium found in only a few other angiosperm families. The study of family is known as synantherology. The vernacular name daisy, widely applied to members of family, is derived from its Old English name, dægesege, from dæges eage. This is because the open at dawn and close at dusk. Composite flowers have a distribution, and are found everywhere except Antarctica. They are especially numerous in tropical and subtropical regions, Compositae were first described in 1792 by the German botanist Paul Dietrich Giseke. Traditionally, two subfamilies were recognised, Asteroideae and Cichorioideae, the latter has been shown to be extensively paraphyletic, and has now been divided into 12 subfamilies, but the former still stands. The phylogenetic tree presented below is based on Panero & Funk updated in 2014, the diamond denotes a very poorly supported node, the dot a poorly supported node
Asteraceae
Asteraceae
–
A typical Asteraceae flower head (here
Bidens torta) showing the individual flowers
Asteraceae
–
Disc floret (as in Asteroideae)
Asteraceae
–
Seeds are dispersed by the wind in
Carlina.
8.
Cichorieae
–
The Cichorieae are a tribe in the plant family Asteraceae that includes 93 genera and more than 1600 sexually reproductive species and more than 7000 apomictic species. They are found primarily in regions of the Eastern Hemisphere. Cichorieae all have milky latex and flowerheads that only one type of floret. The genera Gundelia and Warionia only have disk florets, while all other genera only have ligulate florets, well known members include lettuce, chicory, dandelion, and salsify. Most species are herbaceous, perennial, short-lived or annual plants, the leaves are in a rosette or alternately set along the stem, but this is the dominant situation in the Asteraceae. The only exception in the Cichorieae are the lower leaves of Shinnersoseris. However, recently the genera Gundelia and Warionia have been included in the Cichorieae, and those two genera have heads containing only disk flowers. In his Elemens de botanique ou methode pour connoître les plantes of 1694, Joseph Pitton de Tournefort first described this group as a taxonomic unit, amazingly, he only assigned taxa to it that are still regarded part of the Cichorieae today. Sébastien Vaillant gave this group the name Cichoracées in 1723, the name Lactuceae that was coined by Henri Cassini in 1819, comprises the same group of taxa and is thus a synonym. P. De Candolle, George Bentham and Karl August Otto Hoffmann, genetic analysis has increased the insight in the phylogenetic relationships between the Cichorieae. The following trees together represent those insights
Cichorieae
–
Cichorieae
9.
Cichorium
–
Cichorium is a genus of plants in the dandelion tribe within the sunflower family. The genus includes two cultivated species commonly known as chicory or endive, plus several wild species, common chicory is a bushy perennial herb with blue or lavender flowers. It grows as a plant on roadsides in its native Europe, and in North America. It is grown for its leaves, when it is known as chicory, endive, radicchio, Belgian endive, French endive. Other varieties are grown for their roots, which are used as a coffee substitute, true endive is a species grown and used as a salad green. It has a bitter taste and has been attributed with herbal properties. Curly endive and the broad-leafed escarole are true endives, Cichorium is used as a food plant by the larvae of some Lepidoptera species including Setaceous Hebrew Character, Turnip Moth, and the grass moth Diasemia reticularis. - Europe, Arabian Peninsula, drier parts of Africa from Algeria to Namibia Cichorium bottae Deflers - Saudi Arabia, - Mediterranean Cichorium spinosum L. - Mediterranean Formerly included are several species now considered better suited to other genera, Aposeris, Arnoseris, Geigeria, Rhagadiolus, Tolpis. Chicory Pollinators Diagnostic photographs, insect pollinators of chicory Cichorium pumilum in Wildflowers of Israel
Cichorium
–
Cichorium
Cichorium
–
Flower of common chicory (
Cichorium intybus)
10.
Binomial nomenclature
–
Such a name is called a binomial name, a binomen, binominal name or a scientific name, more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs, for example, humans belong to the genus Homo and within this genus to the species Homo sapiens. The formal introduction of system of naming species is credited to Carl Linnaeus. But Gaspard Bauhin, in as early as 1623, had introduced in his book Pinax theatri botanici many names of genera that were adopted by Linnaeus. Although the general principles underlying binomial nomenclature are common to these two codes, there are differences, both in the terminology they use and in their precise rules. Similarly, both parts are italicized when a binomial name occurs in normal text, thus the binomial name of the annual phlox is now written as Phlox drummondii. In scientific works, the authority for a name is usually given, at least when it is first mentioned. In zoology Patella vulgata Linnaeus,1758, the original name given by Linnaeus was Fringilla domestica, the parentheses indicate that the species is now considered to belong in a different genus. The ICZN does not require that the name of the person who changed the genus be given, nor the date on which the change was made, in botany Amaranthus retroflexus L. – L. is the standard abbreviation used in botany for Linnaeus. – Linnaeus first named this bluebell species Scilla italica, Rothmaler transferred it to the genus Hyacinthoides, the ICN does not require that the dates of either publication be specified. Prior to the adoption of the binomial system of naming species. Together they formed a system of polynomial nomenclature and these names had two separate functions. First, to designate or label the species, and second, to be a diagnosis or description, such polynomial names may sometimes look like binomials, but are significantly different. For example, Gerards herbal describes various kinds of spiderwort, The first is called Phalangium ramosum, Branched Spiderwort, is aptly termed Phalangium Ephemerum Virginianum, Soon-Fading Spiderwort of Virginia. The Latin phrases are short descriptions, rather than identifying labels, the Bauhins, in particular Caspar Bauhin, took some important steps towards the binomial system, by pruning the Latin descriptions, in many cases to two words. The adoption by biologists of a system of binomial nomenclature is due to Swedish botanist and physician Carl von Linné. It was in his 1753 Species Plantarum that he first began using a one-word trivial name together with a generic name in a system of binomial nomenclature. This trivial name is what is now known as an epithet or specific name
Binomial nomenclature
–
Carl Linnaeus (1707–1778), a Swedish botanist, invented the modern system of binomial nomenclature.
11.
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
Carl Linnaeus
–
Carl von Linné,
Alexander Roslin, 1775. Oil painting in the portrait collection at
Gripsholm Castle
Carl Linnaeus
–
The
coat of arms of Carl von Linné.
Carl Linnaeus
–
Birthplace of Linnæus at
Råshult
Carl Linnaeus
–
Statue of Linnaeus as a University student in
Lund
12.
Synonym (taxonomy)
–
For example, Linnaeus was the first to give a scientific name to the Norway spruce, which he called Pinus abies. This name is no longer in use, it is now a synonym of the current scientific name which is Picea abies, unlike synonyms in other contexts, in taxonomy a synonym is not interchangeable with the name of which it is a synonym. In taxonomy, synonyms are not equals, but have a different status, for any taxon with a particular circumscription, position, and rank, only one scientific name is considered to be the correct one at any given time. A synonym cannot exist in isolation, it is always an alternative to a different scientific name, given that the correct name of a taxon depends on the taxonomic viewpoint used a name that is one taxonomists synonym may be another taxonomists correct name. Synonyms may arise whenever the same taxon is described and named more than once, independently. They may also arise when existing taxa are changed, as when two taxa are joined to one, a species is moved to a different genus. To the general user of scientific names, in such as agriculture, horticulture, ecology, general science. A synonym is a name that was used as the correct scientific name but which has been displaced by another scientific name. Thus Oxford Dictionaries Online defines the term as a name which has the same application as another. In handbooks and general texts, it is useful to have mentioned as such after the current scientific name. Synonyms used in this way may not always meet the strict definitions of the synonym in the formal rules of nomenclature which govern scientific names. Changes of scientific name have two causes, they may be taxonomic or nomenclatural, a name change may be caused by changes in the circumscription, position or rank of a taxon, representing a change in taxonomic, scientific insight. A name change may be due to purely nomenclatural reasons, that is, based on the rules of nomenclature, the earliest such name is called the senior synonym, while the later name is the junior synonym. One basic principle of zoological nomenclature is that the earliest correctly published name, synonyms are important because if the earliest name cannot be used, then the next available junior synonym must be used for the taxon. Objective synonyms refer to taxa with the type and same rank. For example, John Edward Gray published the name Antilocapra anteflexa in 1855 for a species of pronghorn, however, it is now commonly accepted that his specimen was an unusual individual of the species Antilocapra americana published by George Ord in 1815. Ords name thus takes precedence, with Antilocapra anteflexa being a subjective synonym. Objective synonyms are common at the level of genera, because for various reasons two genera may contain the type species, these are objective synonyms
Synonym (taxonomy)
–
The
Latin Caudata and
Greek Urodela both mean "tailed" and have been used as a scientific name at the rank of order for the
salamanders (as opposed to the tail-less
frogs). Thus they are synonyms.
Synonym (taxonomy)
–
The common dandelion
Taraxacum officinale sensu lato is an extremely widespread group of
apomictic lineages, and some scientists apply the "biological species concept" to divide it into many distinct species; other scientists regard all the names for those independent species as synonyms.
13.
Perennial plant
–
A perennial plant or simply perennial is a plant that lives for more than two years. The term is used to differentiate a plant from shorter-lived annuals and biennials. The term is widely used to distinguish plants with little or no woody growth from trees and shrubs. Tomato vines, for example, live several years in their natural habitat but are grown as annuals in temperate regions because they dont survive the winter. There is also a class of evergreen, or non-herbaceous, perennials, an intermediate class of plants is known as subshrubs, which retain a vestigial woody structure in winter, e. g. Penstemon. The local climate may dictate whether plants are treated as shrubs or perennials, for instance, many varieties of Fuchsia are shrubs in warm regions, but in colder temperate climates may be cut to the ground every year as a result of winter frosts. The symbol for a plant, based on Species Plantarum by Linnaeus, is. Perennial plants can be short-lived or they can be long-lived, as are some plants like trees. They include an assortment of plant groups from ferns and liverworts to the highly diverse flowering plants like orchids. Plants that flower and fruit only once and then die are termed monocarpic or semelparous, however, most perennials are polycarpic, flowering over many seasons in their lifetime. Perennials typically grow structures that allow them to adapt to living one year to the next through a form of vegetative reproduction rather than seeding. These structures include bulbs, tubers, woody crowns, rhizomes plus others and they might have specialized stems or crowns that allow them to survive periods of dormancy over cold or dry seasons during the year. Many perennials have developed specialized features that allow them to extreme climatic. Some have adapted to hot and dry conditions or cold temperatures. Those plants tend to invest a lot of resource into their adaptations and often do not flower, Many perennials produce relatively large seeds, which can have an advantage, with larger seedlings produced after germination that can better compete with other plants. Some annuals produce many seeds per plant in one season, while some perennials are not under the same pressure to produce large numbers of seeds. In warmer and more favorable climates, perennials grow continuously, in seasonal climates, their growth is limited to the growing season. In some species, perennials retain their foliage all year round, other plants are deciduous perennials, for example, in temperate regions a perennial plant may grow and bloom during the warm part of the year, with the foliage dying back in the winter
Perennial plant
–
Common chicory,
Cichorium intybus, is a herbaceous perennial plant
Perennial plant
–
Dahlia plants are perennial.
Perennial plant
–
Switchgrass is a deep-rooted perennial. These roots are more than 3 meters long.
Perennial plant
14.
Herbaceous plant
–
Herbaceous plants are plants that have no persistent woody stem above ground. Herbaceous plants may be annuals, biennials or perennials, annual herbaceous plants die completely at the end of the growing season or when they have flowered and fruited, and they then grow again from seed. Herbaceous perennial and biennial plants may have stems that die at the end of the growing season, but parts of the plant survive under or close to the ground from season to season. New growth develops from living tissues remaining on or under the ground, including roots, examples of herbaceous biennials include carrot, parsnip and common ragwort, herbaceous perennials include potato, peony, hosta, mint, most ferns and most grasses. Some relatively fast-growing herbaceous plants are pioneers, or early-successional species, others form the main vegetation of many stable habitats, occurring for example in the ground layer of forests, or in naturally open habitats such as meadow, salt marsh or desert. Some herbaceous plants can grow large, such as the Musa genus. The age of some herbaceous plants can be determined by analyzing annual growth rings in the secondary root xylem
Herbaceous plant
–
Trientalis latifolia (Broadleaf Starflower) is a perennial herbaceous plant of the ground layer of forests in western North America.
15.
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
Flower
–
A poster with flowers or clusters of flowers produced by twelve species of flowering plants from different families
Flower
–
Main parts of a mature flower (
Ranunculus glaberrimus)
Flower
–
Reproductive parts of Easter Lily (Lilium longiflorum). 1. Stigma, 2. Style, 3. Stamens, 4. Filament, 5. Petal
Flower
–
Left: A normal zygomorphic Streptocarpus flower. Right: An aberrant peloric Streptocarpus flower. Both of these flowers appeared on the Streptocarpus hybrid 'Anderson's Crows' Wings'.
16.
Salad leaves
–
Leaf vegetables, also called potherbs, greens, vegetable greens, leafy greens, or salad greens, are plant leaves eaten as a vegetable, sometimes accompanied by tender petioles and shoots. Although they come from a wide variety of plants, most share a great deal with other leaf vegetables in nutrition. Nearly one thousand species of plants with leaves are known. Leaf vegetables most often come from short-lived herbaceous plants such as lettuce, woody plants whose leaves can be eaten as leaf vegetables include Adansonia, Aralia, Moringa, Morus, and Toona species. The leaves of many crops are also edible for humans. Examples include alfalfa, clover, and most grasses, including wheat and these plants are often much more prolific than more traditional leaf vegetables, but exploitation of their rich nutrition is difficult, primarily because of their high fiber content. This obstacle can be overcome by further processing such as drying and grinding into powder or pulping and pressing for juice, Leaf vegetables contain many typical plant nutrients, but since they are photosynthetic tissues, their vitamin K levels are particularly notable. Phylloquinone, the most common form of the vitamin, is involved in photosynthesis. This causes leaf vegetables to be the primary food class that interacts significantly with the anticoagulant warfarin, Leaf vegetables are typically low in calories and fat, and high in protein per calorie, dietary fiber, vitamin C, pro-vitamin A carotenoids, folate, manganese and vitamin K. The vitamin K content of leaf vegetables is particularly high, since these are photosynthetic tissues, accordingly, users of vitamin K antagonist medications, such as warfarin, must take special care to limit consumption of leaf vegetables. If leaves are cooked for food, they may be referred to as boiled greens, Leaf vegetables may be stir-fried, stewed, steamed, or consumed raw. Leaf vegetables stewed with pork are a dish in soul food. They are also eaten in a variety of South Asian dishes such as saag. Leafy greens can be used to other ingredients into an edible package similar to how a tortilla is used. Many green leafy vegetables, such as lettuce or spinach, can also be eaten raw, a green smoothie enables large quantities of raw leafy greens to be consumed by blending the leaves with fruit and water. In certain countries of Africa, various species of amaranth are very widely eaten boiled. Celosia argentea var. argentea or Lagos spinach is one of the main boiled greens in West African cuisine, in Greek cuisine, khorta are a common side dish, eaten hot or cold and usually seasoned with olive oil and lemon. Preboggion, a mixture of different wild boiled greens, is used in Ligurian cuisine to stuff ravioli, one of the main ingredients of preboggion are borage leaves
Salad leaves
–
Spinach leaves in a
colander.
Salad leaves
–
Fresh
Gotukola (Centella asiatica)
Salad leaves
–
Fresh
Swiss chard
Salad leaves
–
Sabzi Khordan, an Iranian salad-like dish.
17.
Coffee substitute
–
Coffee substitutes are non-coffee products, usually without caffeine, that are used to imitate coffee. Coffee substitutes can be used for medical, economic and religious reasons, roasted grain beverages are common substitutes for coffee. In World War II, acorns were used to make coffee, as were roasted chicory, Coffee substitutes are sometimes used in preparing foods served to children or to people who avoid caffeine, or in the belief that they are healthier than coffee. For religious reasons, members of the Church of Jesus Christ of Latter-day Saints, also known as Mormons, refrain from drinking coffee, some culinary traditions, like that of Korea, include beverages made from roasted grain instead of coffee or tea. These do not substitute for coffee but fill its niche as a hot drink, grain coffee and other substitutes can be made by roasting or decocting various organic substances. The Native American tribes of what is now the Southeastern United States brewed a ceremonial drink containing caffeine, asi, or the black drink, from the roasted leaves, european colonists adopted this beverage as a coffee-substitute, which they called cassina. Ground roasted chicory root has been sold commercially on a scale since around 1970. It was widely used during the American Civil War on both sides, and has enjoyed popularity especially in New Orleans, where Luzianne has long been a popular brand in this respect. Chicory mixed with coffee is popular in South India, and is known as Indian filter coffee. Postum is an instant type of coffee made from roasted wheat bran, wheat. It reached its height of popularity in the United States during World War II when coffee was sharply rationed, barleycup is a similar product sold in the UK. Camp Coffee is a mix of chicory and coffee from the UK, Nestlé Caro is made of roasted barley, malted barley, chicory, and rye and is used as a coffee substitute. There are many dandelion based powdered coffee substitutes known as dandelion coffee, inka is a Polish drink made of rye, barley, chicory, and sugar beet, produced since 1971. Ersatz is made of roasted rice, roasted peas, and roasted chicory, muckefuck, a generic term in Germany for coffee substitutes, possibly from the French mocca faux. New Life Coffee produces a coffee substitute from roasted soybeans. Ricoré is a mix of chicory and coffee from France created in 1953, teeccino Caffé produces blends of coffee substitute from a variety of ingredients such as carob, chicory, and dandelion roots. Postum, once popular among Mormons, is made from roasted wheat bran, wheat, choffy is a recent substitute made from cacao and brewed like coffee. Roasted chickpeas were noted as a substitute as early as the 18th century
Coffee substitute
–
A pack of coffee substitute Koff by J.J. Darboven (mid 20th century)
Coffee substitute
–
Topics
Coffee substitute
18.
Livestock
–
Livestock are domesticated animals raised in an agricultural setting to produce commodities such as food, fiber, and labor. The term is used to refer solely to those raised for food. In recent years, some organizations have also raised livestock to promote the survival of rare breeds, animal husbandry practices have varied widely across cultures and time periods. Originally, livestock were not confined by fences or enclosures, but these practices have largely shifted to intensive animal farming and these practices increase yield of the various commercial outputs, but have led to increased concerns about animal welfare and environmental impact. Livestock production continues to play an economic and cultural role in numerous rural communities. Livestock as a word was first used between 1650 and 1660, as a merger between the live and stock. Older English sources, such as the King James Version of the Bible, the word cattle is derived from Old North French catel, which meant all kinds of movable personal property, including livestock, which was differentiated from immovable real estate. In later English, sometimes smaller livestock such as chickens and pigs were referred to as small cattle, today, the modern meaning of cattle, without a modifier, usually refers to domesticated bovines, but sometimes livestock refers only to this subgroup. Legal definition United States federal legislation sometimes more narrowly defines the term to make specified agricultural commodities either eligible or ineligible for a program or activity, for example, the Livestock Mandatory Reporting Act of 1999 defines livestock only as cattle, swine, and sheep. Animal-rearing originated during the transition to settled farming communities from hunter-gatherer lifestyles. Animals are domesticated when their breeding and living conditions are controlled by humans, over time, the collective behaviour, lifecycle and physiology of livestock have changed radically. Many modern farm animals are unsuited to life in the wild, dogs were domesticated in East Asia about 15,000 years ago. Goats and sheep were domesticated around 8000 BC in Asia, swine or pigs were domesticated by 7000 BC in the Middle East and China. The earliest evidence of horse domestication dates to around 4000 BC, the term livestock is nebulous and may be defined narrowly or broadly. Broadly, livestock refers to any breed or population of animal kept by humans for a useful and this can mean domestic animals, semidomestic animals, or captive wild animals. Semidomesticated refers to animals which are only lightly domesticated or of disputed status and these populations may also be in the process of domestication. Some people may use the term livestock to refer to only used for red meat. Livestock are used by humans for a variety of purposes, many of which have an economic value, Livestock products include, Meat A useful form of dietary protein and energy, meat is the edible tissue of the animal carcass
Livestock
–
Domestic sheep and a
cow (heifer) pastured together in
South Africa
Livestock
–
Alpaca Mammal,
herbivore
Livestock
–
Banteng Mammal,
herbivore
Livestock
–
Bison Mammal,
herbivore
19.
Endive
–
Endive is a leaf vegetable belonging to the genus Cichorium, which includes several similar bitter leafed vegetables. Species include Cichorium endivia, Cichorium pumilum, and Cichorium intybus, common chicory includes types such as radicchio, puntarelle, and Belgian endive. There is considerable confusion between Cichorium endivia and Cichorium intybus, Endive is rich in many vitamins and minerals, especially in folate and vitamins A and K, and is high in fiber. There are two varieties of cultivated C. endivia endive, Curly endive, or frisée. This type has narrow, green, curly outer leaves and it is sometimes called chicory in the United States and is called chicorée frisée in French. Further confusion results from the fact that also refers to greens lightly wilted with oil. Escarole, or broad-leaved endive, has broad, pale green leaves and is less bitter than the other varieties, varieties or names include broad-leaved endive, Bavarian endive, Batavian endive, grumolo, scarola, and scarole. It is eaten like other greens, sauteed, chopped into soups and stews, Cichorium intybus endive is popular in Europe, and is also known as leaf chicory. Media related to Endive at Wikimedia Commons Endive at Wikibook Cookbooks Chisholm, Hugh, ed. Endive
Endive
–
Endive
Endive
–
Frisée (withered)
20.
Cornflower
–
Centaurea cyanus, commonly known as cornflower, is an annual flowering plant in the family Asteraceae, native to Europe. In the past it often grew as a weed in cornfields, in reaction to this, the conservation charity Plantlife named it as one of 101 species it would actively work to bring Back from the Brink. Cornflower is a plant growing to 16-35 inches tall, with grey-green branched stems. The leaves are lanceolate, 1–4 cm long, the flowers are most commonly an intense blue colour, produced in flowerheads 1. 5–3 cm diameter, with a ring of a few large, spreading ray florets surrounding a central cluster of disc florets. The blue pigment is protocyanin, which in roses is red, Centaurea cyanus is native to temperate Europe, but is widely naturalized outside its native range. It has been present in the British Isles as an archaeophyte since the Iron Age, in Ireland, in Co. Clare Centaurea cyanus is recorded in arable fields as very rare and almost extinct. While in the north-east of Ireland it was abundant before 1930s, the common names bachelors button, bluebottle, boutonniere flower, hurtsickle or cyani flower are also used. It may also be referred to as basketflower, though the term refers to the Plectocephalus group of Centaurea. Cornflower is also used for chicory, and a few other Centaurea species and it is grown as an ornamental plant in gardens, where several cultivars have been selected with varying pastel colours, including pink and purple. Cornflower is also grown for the industry in Canada for use by florists. The most common variety for this use is a doubled blue variety such as Blue Boy or Blue Diadem. White, pink, lavender and black are used but less commonly. A relative, Centaurea montana, is a plant which is also cultivated as a garden plant. Soil pH requirements, neutral to mildly alkaline, the cornflower is considered a beneficial weed, and its edible flower can be used for culinary decoration, for example to add colour to salads. In herbalism, a decoction of cornflower is effective in treating conjunctivitis, cornflowers have been used and prized historically for their blue pigment. Cornflowers are often used as an ingredient in some tea blends and herbal teas, in folklore, cornflowers were worn by young men in love, if the flower faded too quickly, it was taken as a sign that the mans love was not returned. The blue cornflower has been the national flower of Estonia since 1968, the blue cornflower was one of the national symbols of Germany. The flower thus became identified with Prussia, not least because it was the color as the Prussian military uniform
Cornflower
–
Centaurea cyanus
Cornflower
–
"Cornflower" redirects here. It is not to be confused with
cornflour. For the fictional anthropomorphic mouse, see
Cornflower (Redwall). For the painting by Sergei Ivanovich Osipov, see
Cornflowers (painting).
Cornflower
–
Dried Cornflower as used in
herbal tea &
tea blends
Cornflower
21.
Radicchio
–
Radicchio is a cultivated form of leaf chicory, sometimes known as Italian chicory, and is a perennial. It is grown as a vegetable which usually has white-veined red leaves. It has a bitter and spicy taste, which mellows when it is grilled or roasted, pliny the Elder claimed radicchio was useful as a blood purifier and an aid for insomniacs in Naturalis Historia. In fact, radicchio contains intybin, a sedative/analgesic, as well as a type of flavonoid called anthocyanin which is used for making dye-sensitized solar cells, radicchio rosso di Treviso resembles a large red Belgian endive. Radicchio farmers of the Veneto have sought to have Protected Geographical Status applied to the names of some radicchio varieties including Tardivo, in Italian cuisine, it is usually eaten grilled in olive oil, or mixed into dishes such as risotto. It can also be served with pasta, or be used in strudel, as a poultry stuffing, as with all chicories, its roots, after roasting and grinding, can be used as a coffee substitute or coffee additive. According to traditional folklore, long-term use of chicory as a substitute may damage human retinal tissue, with dimming of vision over time. Modern scientific literature contains little or no evidence to support or refute this claim, root chicory contains volatile oils similar to those found in plants in the related genus Tanacetum which includes Tansy, and is likewise effective at eliminating intestinal worms. All parts of the plant contain these volatile oils, with the majority of the toxic components concentrated in the plants root, studies indicate that ingestion of chicory by farm animals results in reduction of worm burdens, which has prompted its widespread use as a forage supplement. There are only a few major companies active in research, development, most of them are in New Zealand. Radicchio is easy to grow but performs best in spring and fall gardens and it prefers more frequent but not deep watering, the amount of water varying based on soil type. Infrequent watering will lead to a bitter tasting leaf. However, for fall crops the flavor is changed predominantly by the onset of cold weather, there are newer, self-heading varieties whose taste is not yet as good as a traditional variety which has matured through several frosts or freezes. Radicchio matures in three months. However, it can be made to stand through a UK or West European winter, traditionally in the UK, the first cutting of all chicory heads was simply thrown away, and the tender, forced, second head was for the table. However, improved varieties of radicchio, e. g. Rosso di Verona, and generally milder winters allow the West European cultivator to harvest two or more crops from a single planting
Radicchio
–
Radicchio
22.
Lanceolate
–
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
Lanceolate
–
Oddly pinnate, pinnatifid leaves (Apium graveolens,
celery)
Lanceolate
–
Chart illustrating leaf morphology terms
Lanceolate
–
Perfoliate
bracts completely surrounding the plant stem (
Lonicera sempervirens)
Lanceolate
–
Partial
chlorosis revealing palmate
venation in simple leaves of Hibiscus mutabilis
23.
Involucral bract
–
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves and they may be smaller, larger, or of a different color, shape, or texture. Typically, they look different from the parts of the flower. The state of having bracts is referred to as bracteate or bracteolate, some bracts are brightly colored and serve the function of attracting pollinators, either together with the perianth or instead of it. Examples of this type of bract include Euphorbia pulcherrima and Bougainvillea, in grasses, each floret is enclosed in a pair of papery bracts, called the lemma and palea, while each spikelet has a further pair of bracts at its base called glumes. These bracts form the chaff removed from cereal grain during threshing and winnowing, bats may detect acoustic signals from dish-shaped bracts such as those of Marcgravia evenia. A prophyll is a structure, such as a bracteole. The term can mean the lower bract on a peduncle. The frequently showy pair of bracts of Euphorbia species in subgenus Lacanthis are the cyathophylls, bracts subtend the cone scales in the seed cones of many conifers, and in some cases, such as Pseudotsuga, they extend beyond the cone scales. A small bract is called a bracteole or bractlet, technically this is any bract that arises on a pedicel instead of subtending it. Bracts that appear in a whorl subtending an inflorescence are called an involucre. An involucre is a common feature beneath the inflorescences of many Apiaceae, Asteraceae, Dipsacaceae and Polygonaceae, each flower in an inflorescence may have its own whorl of bracts, in this case called an involucel. In this case they may be called chaff, paleas, or receptacular bracts and are usually minute scales or bristles, many asteraceous plants have bracts at the base of each inflorescence. The term involucre is also used for a highly conspicuous bract or bract pair at the base of an inflorescence, in the family Betulaceae, notably in the genera Carpinus and Corylus, the involucre is a leafy structure that protects the developing nuts. Beggar-tick has narrow involucral bracts surrounding each inflorescence, each of which also has a bract below it. There is then a pair of bracts on the main stem. It is a calyx-like extra whorl of floral appendages, each individual segment of the epicalyx is called an episepal because they resemble the sepals. They are present in family Malvaceae, the Hibiscus family, fragaria may or may not have an epicalyx
Involucral bract
–
Papery (upper) and leafy bracts on hay rattle (
Rhinanthus minor). All the "leaves" in this image are bracts.
Involucral bract
–
Bracts of
Bougainvillea glabra, differ in colour from the non-bract leaves, and attract pollinators
Involucral bract
–
Bracts along a
banana flower stalk surround the rows of flowers
Involucral bract
–
Euphorbia milii var. vulcanii cyathia bearing a pair of pinkish cyathophylls
24.
Achenes
–
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
Achenes
–
Strawberry achenes seen up close.
Achenes
–
Cypsela of
Cynara
Achenes
–
Cypselae on a dandelion "clock" (the matured
capitulum) can disperse in the wind due to the hair-like
calyx tissue above each ovary.
Achenes
–
A microscopic view of a dandelion "clock" showing the receptacle and the cypselas.
25.
Bitterness (taste)
–
Taste, gustatory perception, or gustation is one of the five traditional senses that belongs to the gustatory system. Taste is the sensation produced when a substance in the mouth reacts chemically with taste receptor cells located on taste buds in the oral cavity, Taste, along with smell and trigeminal nerve stimulation, determines flavors of food or other substances. Humans have taste receptors on taste buds and other areas including the surface of the tongue. The tongue is covered with thousands of small bumps called papillae, within each papilla are hundreds of taste buds. The exception to this is the filiform papillae that do not contain taste buds, there are between 2000 and 5000 taste buds that are located on the back and front of the tongue. Others are located on the roof, sides and back of the mouth, each taste bud contains 50 to 100 taste receptor cells. The sensation of taste includes five established basic tastes, sweetness, sourness, saltiness, bitterness, scientific experiments have proven that these five tastes exist and are distinct from one another. Taste buds are able to differentiate among different tastes through detecting interaction with different molecules or ions, Sweet, umami, and bitter tastes are triggered by the binding of molecules to G protein-coupled receptors on the cell membranes of taste buds. Saltiness and sourness are perceived when alkali metal or hydrogen ions enter taste buds, temperature, detected by thermoreceptors, and coolness and hotness, through chemesthesis. As taste senses both harmful and beneficial things, all basic tastes are classified as either aversive or appetitive, Sweetness helps to identify energy-rich foods, while bitterness serves as a warning sign of poisons. Among humans, taste perception begins to fade around 50 years of age because of loss of tongue papillae, Taste in the gustatory system allows humans to distinguish between safe and harmful food, and to gauge foods’ nutritional value. Digestive enzymes in saliva begin to dissolve food into base chemicals that are washed over the papillae, the tongue is covered with thousands of small bumps called papillae, which are visible to the naked eye. Within each papilla are hundreds of taste buds, the exception to this are the filiform papillae that do not contain taste buds. There are between 2000 and 5000 taste buds that are located on the back and front of the tongue, others are located on the roof, sides and back of the mouth, and in the throat. Each taste bud contains 50 to 100 taste receptor cells, bitter foods are generally found unpleasant, while sour, salty, sweet, and meaty tasting foods generally provide a pleasurable sensation. The five specific tastes received by taste receptors are saltiness, sweetness, bitterness, sourness, and umami, as of the early twentieth century, physiologists and psychologists believed there were four basic tastes, sweetness, sourness, saltiness, and bitterness. At that time umami was not identified but now a number of authorities recognize it as the fifth taste. One study found that salt and sour taste mechanisms detect, in different ways, the presence of sodium chloride in the mouth, however
Bitterness (taste)
–
Taste bud
26.
Liguria
–
Liguria is a coastal region of north-western Italy, its capital is Genoa. The region is popular with tourists for its beaches, towns, Liguria is bordered by France to the west, Piedmont to the north, and Emilia-Romagna and Tuscany to the east. It lies on the Ligurian Sea, the narrow strip of land is bordered by the sea, the Alps and the Apennines mountains. Some mountains rise above 2,000 m, the line runs at an average altitude of about 1,000 m. The highest point of the region is the summit of Monte Saccarello, the winding arched extension goes from Ventimiglia to La Spezia. Of this,3,524.08 km2 are mountainous and 891.95 km2 are hills, Ligurias natural reserves cover 12% of the entire region, or 600 km2 of land. They are made up of one national reserve, six large parks, the continental shelf is very narrow, and so steep it descends almost immediately to considerable marine depths along its 350-kilometre coastline. Except for the Portovenere and Portofino promontories, it is not very jagged. At the mouths of the biggest watercourses there are small beaches, the ring of hills lying immediately beyond the coast together with the sea account for a mild climate year-round. Average winter temperatures are 7 to 10 °C and summer temperatures are 23 to 24 °C, rainfall can be abundant at times, as mountains very close to the coast create an orographic effect. Genoa and La Spezia can see up to 2,000 mm of rain in a year, evidence of Neanderthals living in the area was discovered in the region of Loano, whereas in Ventimiglia, in the grotto of Balzi Rossi, numerous remains were found of Cro-Magnon. According to Classical sources, the Ligurians, once lived in a far broader territory than present-day Liguria, for example, the Greek colony of Massalia, modern Marseille was recorded to lie in Ligurian territory. During the first Punic War, the ancient Ligurians were divided, some of them siding with Carthage, under Augustus, Liguria was designated a region of Italy stretching from the coast to the banks of the Po River. The great Roman roads helped strengthen territorial unity and increase communication, important towns developed on the coast, of which evidence is left in the ruins of Albenga, Ventimiglia and Luni. Between the 4th and the 10th centuries Liguria was dominated by the Byzantines, the Lombards of King Rothari and it was also invaded by Saracen and Norman raiders. In the 10th century, once the danger of pirates decreased, in the 11th and 12th centuries the marches were split into fees, and then with the strengthening of the bishops’ power, the feudal structure began to partially weaken. The main Ligurian towns, especially on the coast, became city-states, inland, however, fiefs belonging to noble families survived for a very long time. Between the 11th century and the 15th century, the Republic of Genoa experienced a political and commercial success
Liguria
–
A view of
Cinque Terre.
Liguria
–
Liguria
Liguria
–
The Roman amphitheatre of
Luni (1st century AD).
Liguria
–
Simonetta Vespucci, a native Ligurian who was a famous beauty during the Renaissance, may have been the model for
Botticelli's The Birth of Venus
27.
Apulia
–
Apulia is a region of Italy in Southern Italy bordering the Adriatic Sea in the east, the Ionian Sea to the southeast, and the Strait of Òtranto and Gulf of Taranto in the south. Its southernmost portion, known as the Salento peninsula, forms a stiletto on the boot of Italy, the region comprises 19,345 square kilometers, and its population is about 4 million. It is bordered by the other Italian regions of Molise to the north, Campania to the west, across the Adriatic and Ionian Seas, it faces Albania, Bosnia-Herzegovina, Croatia, Greece, and Montenegro, The Apulia region extends as far north as Monte Gargano. Puglias coastline is longer than any other mainland Italian region, in the north, the Gargano promontory extends out into the Adriatic, while in the south, the flat and dry Salento peninsula forms the heel of Italys boot. It is home to the Alta Murgia and Gargano National Parks, see also, History of Apulia Apulia is one of the richest archaeological regions in Italy. It was first colonized by Mycenaean Greeks, a number of castles were built in the area by Holy Roman Emperor Frederick II, including Castel del Monte, sometimes called the Crown of Apulia. After 1282, when the island of Sicily was lost, Apulia was part of the Kingdom of Naples, as a result of the French–Spanish war of 1501–1504, Naples again came under the rule of Aragon and the Spanish Empire from 1504 to 1714. When Barbary pirates of North Africa sacked Vieste in 1554, they took an estimated 7,000 slaves, in 1861 the region became part of the Kingdom of Italy, with the new capital city at Turin. In the words of one historian, Turin was so far away that Otranto is today closer to seventeen foreign capitals than it is to Turin, the regions contribution to Italys gross value added was around 4. 6% in 2000, while its population was 7% of the total. The per capita GDP is low compared to the national average, in comparison with the country as a whole, the economy of Apulia is characterised by a greater emphasis on agriculture and services and a smaller part played by industry. In the last 20 years the base of the regions economy has changed radically. The majority of firms are financed by local capital. In certain of these sectors – especially textiles, clothing, footwear, vehicles, the region has a good network of roads but the railway network is somewhat inadequate, particularly in the south. Apulias 800 kilometers of coastline is studded with ports, which make this region an important terminal for transport and tourism to Greece, between 2007 and 2013 the economy of Apulia expanded more than that of the rest of southern Italy. Such growth, over decades, is a severe challenge to the hydrogeological system. Emigration from the depressed areas to northern Italy and the rest of Europe was very intense in the years between 1956 and 1971. Subsequently, the trend declined as economic conditions improved, to the point where there was net immigration in the years between 1982 and 1985, since 1986 the stagnation in employment has led to a new inversion of the trend, caused by a decrease in immigration. Since 1 June 2015, former judge and mayor of Bari Michele Emiliano of the Democratic Party has served as President, Apulia is divided into five administrative provinces and one metropolitan city, Cuisine plays an important role throughout Apulia
Apulia
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Marina di Marittima,
Salento
Apulia
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Apulia Puglia
Apulia
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Castel del Monte, built by the
Holy Roman Emperor Frederick II between 1240 and 1250 in
Andria
Apulia
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The medieval town
Ostuni
28.
Italy
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Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino, Italy covers an area of 301,338 km2 and has a largely temperate seasonal and Mediterranean climate. Due to its shape, it is referred to in Italy as lo Stivale. With 61 million inhabitants, it is the fourth most populous EU member state, the Italic tribe known as the Latins formed the Roman Kingdom, which eventually became a republic that conquered and assimilated other nearby civilisations. The legacy of the Roman Empire is widespread and can be observed in the distribution of civilian law, republican governments, Christianity. The Renaissance began in Italy and spread to the rest of Europe, bringing a renewed interest in humanism, science, exploration, Italian culture flourished at this time, producing famous scholars, artists and polymaths such as Leonardo da Vinci, Galileo, Michelangelo and Machiavelli. The weakened sovereigns soon fell victim to conquest by European powers such as France, Spain and Austria. Despite being one of the victors in World War I, Italy entered a period of economic crisis and social turmoil. The subsequent participation in World War II on the Axis side ended in defeat, economic destruction. Today, Italy has the third largest economy in the Eurozone and it has a very high level of human development and is ranked sixth in the world for life expectancy. The country plays a prominent role in regional and global economic, military, cultural and diplomatic affairs, as a reflection of its cultural wealth, Italy is home to 51 World Heritage Sites, the most in the world, and is the fifth most visited country. The assumptions on the etymology of the name Italia are very numerous, according to one of the more common explanations, the term Italia, from Latin, Italia, was borrowed through Greek from the Oscan Víteliú, meaning land of young cattle. The bull was a symbol of the southern Italic tribes and was often depicted goring the Roman wolf as a defiant symbol of free Italy during the Social War. Greek historian Dionysius of Halicarnassus states this account together with the legend that Italy was named after Italus, mentioned also by Aristotle and Thucydides. The name Italia originally applied only to a part of what is now Southern Italy – according to Antiochus of Syracuse, but by his time Oenotria and Italy had become synonymous, and the name also applied to most of Lucania as well. The Greeks gradually came to apply the name Italia to a larger region, excavations throughout Italy revealed a Neanderthal presence dating back to the Palaeolithic period, some 200,000 years ago, modern Humans arrived about 40,000 years ago. Other ancient Italian peoples of undetermined language families but of possible origins include the Rhaetian people and Cammuni. Also the Phoenicians established colonies on the coasts of Sardinia and Sicily, the Roman legacy has deeply influenced the Western civilisation, shaping most of the modern world
Italy
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The
Colosseum in Rome, built c. 70 – 80 AD, is considered one of the greatest works of
architecture and
engineering of ancient history.
Italy
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Flag
Italy
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The
Iron Crown of Lombardy, for centuries symbol of the
Kings of Italy.
Italy
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Castel del Monte, built by German Emperor
Frederick II,
UNESCO World Heritage site
