Genus ( / ˈ dʒ iː n ə s / ; pl. : genera / ˈ dʒ ɛ n ər ə / ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses . In binomial nomenclature , the genus name forms the first part of the binomial species name for each species within the genus.
49-398: 247; see text Vicia is a genus of over 240 species of flowering plants that are part of the legume family ( Fabaceae ), and which are commonly known as vetches . Member species are native to Europe, North America, South America, Asia and Africa. Some other genera of their subfamily Faboideae also have names containing "vetch", for example the vetchlings ( Lathyrus ) or
98-401: A beetle bank to provide habitat and shelter for carnivorous beetles and other arthropods to keep down pest invertebrates. When the root nodules of broad bean are inoculated with the rhodospirillacean bacterium Azospirillum brasilense and the glomeracean fungus Glomus clarum , the species can also be productively grown in salty soils . In the 1980s, the auxin 4-Cl-IAA
147-557: A species : see Botanical name and Specific name (zoology) . The rules for the scientific names of organisms are laid down in the nomenclature codes , which allow each species a single unique name that, for animals (including protists ), plants (also including algae and fungi ) and prokaryotes ( bacteria and archaea ), is Latin and binomial in form; this contrasts with common or vernacular names , which are non-standardized, can be non-unique, and typically also vary by country and language of usage. Except for viruses ,
196-418: A broad variety of other purposes. The Hairy Vetch has well-established uses as a green manure and as an allelopathic cover crop . As regards the broad bean, it is known to accumulate aluminum in its tissue; in polluted soils it may be useful in phytoremediation , but with one per mil of aluminum in the dry plant (possibly more in the seeds), it might not be edible anymore. The robust plants are useful as
245-643: A later homonym of a validly published name is a nomen illegitimum or nom. illeg. ; for a full list refer to the International Code of Nomenclature for algae, fungi, and plants and the work cited above by Hawksworth, 2010. In place of the "valid taxon" in zoology, the nearest equivalent in botany is " correct name " or "current name" which can, again, differ or change with alternative taxonomic treatments or new information that results in previously accepted genera being combined or split. Prokaryote and virus codes of nomenclature also exist which serve as
294-621: A long time and redescribed as new by a range of subsequent workers, or if a range of genera previously considered separate taxa have subsequently been consolidated into one. For example, the World Register of Marine Species presently lists 8 genus-level synonyms for the sperm whale genus Physeter Linnaeus, 1758, and 13 for the bivalve genus Pecten O.F. Müller, 1776. Within the same kingdom, one generic name can apply to one genus only. However, many names have been assigned (usually unintentionally) to two or more different genera. For example,
343-409: A reference for designating currently accepted genus names as opposed to others which may be either reduced to synonymy, or, in the case of prokaryotes, relegated to a status of "names without standing in prokaryotic nomenclature". An available (zoological) or validly published (botanical) name that has been historically applied to a genus but is not regarded as the accepted (current/valid) name for
392-427: A taxon; however, the names published in suppressed works are made unavailable via the relevant Opinion dealing with the work in question. In botany, similar concepts exist but with different labels. The botanical equivalent of zoology's "available name" is a validly published name . An invalidly published name is a nomen invalidum or nom. inval. ; a rejected name is a nomen rejiciendum or nom. rej. ;
441-455: A total of c. 520,000 published names (including synonyms) as at end 2019, increasing at some 2,500 published generic names per year. "Official" registers of taxon names at all ranks, including genera, exist for a few groups only such as viruses and prokaryotes, while for others there are compendia with no "official" standing such as Index Fungorum for fungi, Index Nominum Algarum and AlgaeBase for algae, Index Nominum Genericorum and
490-480: Is also called hairy vetch. Hairy vetch is widely used by organic growers in the United States as a winter cover crop and in no-till farming , as it is both winter hardy and can fix as much as 200 lb/acre of atmospheric nitrogen. Disadvantages of hairy vetch in production agriculture are related to the crop having a portion of hard seed and its tendency to shatter seed early in the season, leading to it remaining in
539-522: Is considered invasive by some states, such as Alaska, Florida, Georgia, Kansas, Michigan, Minnesota, Nebraska, Oregon, and Washington state — as well as in Japan and some parts of Europe where it is not native. It is also found in most Canadian provinces. Hairy vetch is very similar to tufted vetch ( Vicia cracca ), the most noticeable difference being that tufted vetch has a smooth stem. Several subspecies are recognized: The species Vicia hirsuta
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#1732847793664588-596: Is discouraged by both the International Code of Zoological Nomenclature and the International Code of Nomenclature for algae, fungi, and plants , there are some five thousand such names in use in more than one kingdom. For instance, A list of generic homonyms (with their authorities), including both available (validly published) and selected unavailable names, has been compiled by the Interim Register of Marine and Nonmarine Genera (IRMNG). The type genus forms
637-822: Is named after the genus' current name. The true peas ( Pisum ) are among the closest living relatives of vetches. Bitter vetch ( V. ervilia ) was one of the first domesticated crops . It was grown in the Near East about 9,500 years ago, starting perhaps even one or two millennia earlier during the Pre-Pottery Neolithic A . By the time of the Central European Linear Pottery culture – about 7,000 years ago – broad bean ( V. faba ) had also been domesticated. Vetch has been found at Neolithic and Eneolithic sites in Bulgaria, Hungary and Slovakia. And at
686-460: Is somewhat arbitrary. Although all species within a genus are supposed to be "similar", there are no objective criteria for grouping species into genera. There is much debate among zoologists about whether enormous, species-rich genera should be maintained, as it is extremely difficult to come up with identification keys or even character sets that distinguish all species. Hence, many taxonomists argue in favor of breaking down large genera. For instance,
735-474: Is the type species , and the generic name is permanently associated with the type specimen of its type species. Should the specimen turn out to be assignable to another genus, the generic name linked to it becomes a junior synonym and the remaining taxa in the former genus need to be reassessed. In zoological usage, taxonomic names, including those of genera, are classified as "available" or "unavailable". Available names are those published in accordance with
784-674: The Christian Bible , and in the large Celtic Oppidum of Manching from the La Tène culture in Europe some 2,200 years ago. Dishes resembling ful medames are attested in the Jerusalem Talmud which was compiled before 400 AD. In our time, the common vetch ( V. sativa ) has also risen to prominence. Together with broad bean cultivars such as horse bean or field bean, the FAO includes it among
833-621: The International Code of Zoological Nomenclature ; the earliest such name for any taxon (for example, a genus) should then be selected as the " valid " (i.e., current or accepted) name for the taxon in question. Consequently, there will be more available names than valid names at any point in time; which names are currently in use depending on the judgement of taxonomists in either combining taxa described under multiple names, or splitting taxa which may bring available names previously treated as synonyms back into use. "Unavailable" names in zoology comprise names that either were not published according to
882-799: The International Plant Names Index for plants in general, and ferns through angiosperms, respectively, and Nomenclator Zoologicus and the Index to Organism Names for zoological names. Totals for both "all names" and estimates for "accepted names" as held in the Interim Register of Marine and Nonmarine Genera (IRMNG) are broken down further in the publication by Rees et al., 2020 cited above. The accepted names estimates are as follows, broken down by kingdom: The cited ranges of uncertainty arise because IRMNG lists "uncertain" names (not researched therein) in addition to known "accepted" names;
931-503: The lectin phytohemagglutinin and are somewhat poisonous if eaten raw. Split common vetch seeds resemble split red lentils ( Lens culinaris ), and has been occasionally mislabelled as such by exporters or importers to be sold for human consumption. In some countries where lentils are highly popular – e.g., Bangladesh , Egypt , India and Pakistan – import bans on suspect produce have been established to prevent these potentially harmful scams. Vetches have cylindrical root nodules of
980-404: The platypus belongs to the genus Ornithorhynchus although George Shaw named it Platypus in 1799 (these two names are thus synonyms ) . However, the name Platypus had already been given to a group of ambrosia beetles by Johann Friedrich Wilhelm Herbst in 1793. A name that means two different things is a homonym . Since beetles and platypuses are both members of the kingdom Animalia,
1029-401: The 11 most important pulses in the world. The main usage of the common vetch is as forage for ruminant animals, both as fodder and legume , but there are other uses, as tufted vetch V. cracca is grown as a mid-summer pollen source for honeybees . In 2017, global production of vetches was 920,537 tonnes . That year, 560,077 acres were devoted to the cultivation of vetches in
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#17328477936641078-469: The French botanist Joseph Pitton de Tournefort (1656–1708) is considered "the founder of the modern concept of genera". The scientific name (or the scientific epithet) of a genus is also called the generic name ; in modern style guides and science, it is always capitalised. It plays a fundamental role in binomial nomenclature , the system of naming organisms , where it is combined with the scientific name of
1127-442: The base for higher taxonomic ranks, such as the family name Canidae ("Canids") based on Canis . However, this does not typically ascend more than one or two levels: the order to which dogs and wolves belong is Carnivora ("Carnivores"). The numbers of either accepted, or all published genus names is not known precisely; Rees et al., 2020 estimate that approximately 310,000 accepted names (valid taxa) may exist, out of
1176-604: The broad bean, the most widely cultivated and economically significant species. They include the mite Balaustium vignae whose adults are found on broad bean, the potexviruses Alternanthera mosaic virus , clover yellow mosaic virus and white clover mosaic virus , and several other virus species such as Bidens mosaic virus , tobacco streak virus , Vicia cryptic virus and Vicia faba endornavirus . Plants formerly placed in Vicia include: Vicia means 'binder' in Latin ; this
1225-407: The field as a weed later in the season. This can be a particular problem in wheat production. Organic gardeners often plant hairy vetch (a nitrogen-fixing legume) as a companion plant to tomatoes, as an alternative to rotating crops in small growing areas. When it is time to plant tomatoes in the spring, the hairy vetch is cut to the ground and the tomato seedlings are planted in holes dug through
1274-446: The form "author, year" in zoology, and "standard abbreviated author name" in botany. Thus in the examples above, the genus Canis would be cited in full as " Canis Linnaeus, 1758" (zoological usage), while Hibiscus , also first established by Linnaeus but in 1753, is simply " Hibiscus L." (botanical usage). Each genus should have a designated type , although in practice there is a backlog of older names without one. In zoology, this
1323-727: The generic name (or its abbreviated form) still forms the leading portion of the scientific name, for example, Canis lupus lupus for the Eurasian wolf subspecies, or as a botanical example, Hibiscus arnottianus ssp. immaculatus . Also, as visible in the above examples, the Latinised portions of the scientific names of genera and their included species (and infraspecies, where applicable) are, by convention, written in italics . The scientific names of virus species are descriptive, not binomial in form, and may or may not incorporate an indication of their containing genus; for example,
1372-432: The idea that a newly defined genus should fulfill these three criteria to be descriptively useful: Moreover, genera should be composed of phylogenetic units of the same kind as other (analogous) genera. The term "genus" comes from Latin genus , a noun form cognate with gignere ('to bear; to give birth to'). The Swedish taxonomist Carl Linnaeus popularized its use in his 1753 Species Plantarum , but
1421-431: The indeterminate type and are thus nitrogen-fixing plants. Their flowers usually have white to purple or blue hues, but may be red or yellow; they are pollinated by bumblebees , honey bees , solitary bees and other insects . Vicia species are used as food plants by the caterpillars of some butterflies and moths , such as: Most other parasites and plant pathogens affecting vetches have been recorded on
1470-628: The largest component, with 23,236 ± 5,379 accepted genus names, of which 20,845 ± 4,494 are angiosperms (superclass Angiospermae). By comparison, the 2018 annual edition of the Catalogue of Life (estimated >90% complete, for extant species in the main) contains currently 175,363 "accepted" genus names for 1,744,204 living and 59,284 extinct species, also including genus names only (no species) for some groups. The number of species in genera varies considerably among taxonomic groups. For instance, among (non-avian) reptiles , which have about 1180 genera,
1519-479: The lizard genus Anolis has been suggested to be broken down into 8 or so different genera which would bring its ~400 species to smaller, more manageable subsets. Vicia villosa Vicia villosa , known as the hairy vetch , fodder vetch or winter vetch , is a plant native to some of Europe and western Asia . It is a legume , grown as a forage crop, fodder crop, cover crop , and green manure . Although non-native, it occurs in all US states and
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1568-429: The matted residue and stubble. The vetch vegetation provides both nitrogen and an instant mulch that preserves moisture and keeps weeds from sprouting. It is regulated in the state of Florida. Some sources consider it generally invasive in areas with suitable climate for it to out-compete native species, in a manner similar to how cow vetch, Vicia cracca , is regarded. With both vetches, their agricultural usefulness
1617-527: The medically significant N blood group . The vetches grown as forage are generally toxic to non-ruminants (such as humans), at least if eaten in quantity. Cattle and horses have been poisoned by V. villosa and V. benghalensis , two species that contain canavanine in their seeds. Canavanine , a toxic analogue of the amino acid arginine , has been identified in Hairy Vetch as an appetite suppressant for monogastric animals, while Narbon bean contains
1666-524: The milk-vetches ( Astragalus ). The lentils are included in genus Vicia , and were formerly classified in genus Lens . The broad bean ( Vicia faba ) is sometimes separated in a monotypic genus Faba ; although not often used today, it is of historical importance in plant taxonomy as the namesake of the order Fabales , the Fabaceae and the Faboideae. The tribe Vicieae in which the vetches are placed
1715-403: The most (>300) have only 1 species, ~360 have between 2 and 4 species, 260 have 5–10 species, ~200 have 11–50 species, and only 27 genera have more than 50 species. However, some insect genera such as the bee genera Lasioglossum and Andrena have over 1000 species each. The largest flowering plant genus, Astragalus , contains over 3,000 species. Which species are assigned to a genus
1764-428: The name could not be used for both. Johann Friedrich Blumenbach published the replacement name Ornithorhynchus in 1800. However, a genus in one kingdom is allowed to bear a scientific name that is in use as a generic name (or the name of a taxon in another rank) in a kingdom that is governed by a different nomenclature code. Names with the same form but applying to different taxa are called "homonyms". Although this
1813-526: The provisions of the ICZN Code, e.g., incorrect original or subsequent spellings, names published only in a thesis, and generic names published after 1930 with no type species indicated. According to "Glossary" section of the zoological Code, suppressed names (per published "Opinions" of the International Commission of Zoological Nomenclature) remain available but cannot be used as the valid name for
1862-429: The quicker-acting but weaker γ-glutamyl-S- ethenylcysteine . In common vetch, γ-glutamyl-β-cyanoalanine has been found. The active part of this molecule is β-cyanoalanine . It inhibits the conversion of the sulfur amino acid methionine to cysteine . Cystathionine, an intermediary product of this biochemical pathway, is secreted in urine. This process can effectively lead to the depletion of vital protective reserves of
1911-504: The same time, at the opposite end of Eurasia , the Hoabinhian people also utilized the broad bean in their path towards agriculture , as shown by the seeds found in Spirit Cave, Thailand . Bernard of Clairvaux shared a bread-of-vetch meal with his monks during the famine of 1124 to 1126, as an emblem of humility. However, the bitter vetch largely was dropped from human use over time. It
1960-497: The specific name particular to the wolf. A botanical example would be Hibiscus arnottianus , a particular species of the genus Hibiscus native to Hawaii. The specific name is written in lower-case and may be followed by subspecies names in zoology or a variety of infraspecific names in botany . When the generic name is already known from context, it may be shortened to its initial letter, for example, C. lupus in place of Canis lupus . Where species are further subdivided,
2009-412: The standard format for a species name comprises the generic name, indicating the genus to which the species belongs, followed by the specific epithet, which (within that genus) is unique to the species. For example, the gray wolf 's scientific name is Canis lupus , with Canis ( Latin for 'dog') being the generic name shared by the wolf's close relatives and lupus (Latin for 'wolf') being
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2058-737: The sulfur amino acid cysteine and thereby making Vicia sativa seed a dangerous component in mixture with other toxin sources. The Spanish pulse mix comuña contains common vetch and bitter vetch in addition to vetchling ( Lathyrus cicera ) seeds; it can be fed in small quantities to ruminants, but its use as a staple food will cause lathyrism even in these animals. Moreover, common vetch as well as broad bean – and probably other species of Vicia too – contain oxidants like convicine , isouramil , divicine and vicine in quantities sufficient to lower glutathione levels in G6PD -deficient persons to cause favism disease. At least broad beans also contain
2107-403: The taxon is termed a synonym ; some authors also include unavailable names in lists of synonyms as well as available names, such as misspellings, names previously published without fulfilling all of the requirements of the relevant nomenclatural code, and rejected or suppressed names. A particular genus name may have zero to many synonyms, the latter case generally if the genus has been known for
2156-566: The values quoted are the mean of "accepted" names alone (all "uncertain" names treated as unaccepted) and "accepted + uncertain" names (all "uncertain" names treated as accepted), with the associated range of uncertainty indicating these two extremes. Within Animalia, the largest phylum is Arthropoda , with 151,697 ± 33,160 accepted genus names, of which 114,387 ± 27,654 are insects (class Insecta). Within Plantae, Tracheophyta (vascular plants) make up
2205-429: The virus species " Salmonid herpesvirus 1 ", " Salmonid herpesvirus 2 " and " Salmonid herpesvirus 3 " are all within the genus Salmonivirus ; however, the genus to which the species with the formal names " Everglades virus " and " Ross River virus " are assigned is Alphavirus . As with scientific names at other ranks, in all groups other than viruses, names of genera may be cited with their authorities, typically in
2254-581: The world. Over 54% of that output came from Europe alone. Africa (17.8% of world total), Asia (15.6% of world total), Americas (10.6% of world total) and Oceania (1.8% of world total). The bitter vetch, too, is grown extensively for forage and fodder, as are hairy vetch ( V. villosa , also called fodder vetch), bard vetch ( V. articulata ), French vetch ( V. serratifolia ) and Narbon bean ( V. narbonensis ). V. benghalensis and Hungarian vetch ( V. pannonica ) are cultivated for forage and green manure . The vetches also have
2303-697: Was only used to save as a crop of last resort in times of starvation: vetches "featured in the frugal diet of the poor until the eighteenth century, and even reappeared on the black market in the South of France during the Second World War", Maguelonne Toussaint-Samat, of Marseillais background, has remarked. However, broad beans remained prominent. In the Near East the seeds are mentioned in Hittite and Ancient Egyptian sources dating from more than 3,000 years ago as well as in
2352-403: Was studied in V. amurensis and the broad bean, and since 1990, the antibacterial γ-thionins fabatin -1 and -2 have been isolated from the latter species. Despite a small chromosome count of n =6, the broad bean has a high DNA content, making it easy for a micronucleus test of its root tips to recognize genotoxic compounds. A lectin from V. graminea is used to test for
2401-597: Was the name used by Pliny for vetch. The vetch is also referenced by Horace in his account of " The Town Mouse and the Country Mouse " as ervum . This is said to be a source of comfort for the country mouse after a disturbing insight into urban life. Genus The composition of a genus is determined by taxonomists . The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including
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