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.
47-548: See text . Amaryllis ( / ˌ æ m ə ˈ r ɪ l ɪ s / ) is the only genus in the subtribe Amaryllidinae ( tribe Amaryllideae ). It is a small genus of flowering bulbs , with two species. The better known of the two, Amaryllis belladonna , is a native of the Western Cape region of South Africa, particularly the rocky southwest area between the Olifants River Valley and Knysna . For many years there
94-557: 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 ,
141-497: A dry resting period between leaf growth and flower spike production. One or two leafless stems arise from the bulb in the dry ground in late summer (March in its native habitat and August in USDA zone 7 ). The plant has a symbiotic relationship with carpenter bees . It is also visited by noctuid moths at night. The relative importance of these insects as pollinators has not yet been established; however, carpenter bees are thought to be
188-609: A hybrid called × Amarcrinum , which has named cultivars. Hybrids said to be between Amaryllis belladonna and Brunsvigia josephinae have been called × Amarygia . Neither hybrid genus name is accepted by the World Checklist of Selected Plant Families . 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
235-643: 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
282-621: 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,
329-409: 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
376-518: A similar growth and flowering pattern; some of these have their own widely used and accepted common names, such as the resurrection lily ( Lycoris squamigera ). In areas of its native habitat with mountainous fynbos , flowering tends to be suppressed until after bush fires as dense overhead vegetation prevents growth. In more open sandy areas of the Western Cape, the plant flowers annually. Plants tend to be very localized in dense concentrations due to
423-427: 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. ;
470-455: 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
517-676: Is closely related to Crossyne , a genus whose species have prostrate leaves . They are drought tolerant but not cold-hardy, and are very poisonous to livestock. Boophone is the single genus in subtribe Boophoninae, in the Amaryllideae tribe. Boophoninae are placed within Amaryllideae as follows, based on their phylogenetic relationship: Subtribe Amaryllidinae Subtribe Boophoninae Subtribe Strumariinae Subtribe Crininae The list of Boophone species, with their complete scientific name , authority, and geographic distribution
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#1732852297234564-405: Is declinate, stigma is three-lobed. Ovules are approx. 8 per locule . Seeds are compressed-globose, white to pink. The number of chromosomes is 2 n = 22. The single genus is in subtribe Amaryllidinae, in the tribe Amaryllideae . The taxonomy of the genus has been controversial. In 1753 Carl Linnaeus created the name Amaryllis belladonna , the type species of the genus Amaryllis . At
611-596: 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
658-460: Is given below. William Herbert wrote the name of this genus with three different orthographies: "Boophane" in 1821; "Buphane" and "Buphone" in 1825. This final spelling was corrected to "Boophone" in 1839 by Milne-Redhead. The name was derived from the Greek bous (an ox) and phone (death), due to its toxic nature to cattle. A proposal was published in 2001 to conserve the name "Boophone" and to take
705-768: Is one of numerous genera with the common name 'lily' due to their flower shape and growth habit. However, they are only distantly related to the true lily, Lilium . In the Victorian language of flowers , amaryllis means "love, beauty, and determination", and can also represent hope and achievement. Amaryllis is a bulbous plant, with each bulb being 5–10 cm (2.0–3.9 in) in diameter. It has several strap-shaped, hysteranthous , green leaves with midrib , 30–50 cm (12–20 in) long and 2–3 cm (0.79–1.18 in) broad, arranged in two rows. Each bulb produces one or two leafless, stout, persistent and erect stems 30–60 cm (12–24 in) tall, each of which bears at
752-460: 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,
799-474: 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
846-564: The Cape Provinces of South Africa: Amaryllidinae are placed within Amaryllideae as follow: These are phylogenetically related as follows: Subtribe Amaryllidinae Subtribe Boophoninae Subtribe Strumariinae Subtribe Crininae The name Amaryllis is taken from a shepherdess in Virgil 's pastoral Eclogues , (from the Greek ἀμαρύσσω , amarysso , 'to sparkle'. Although
893-621: 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
940-799: 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;
987-404: 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,
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#17328522972341034-405: The 1987 decision settled the question of the scientific name of the genus, the common name 'amaryllis' continues to be used differently. Bulbs sold as amaryllis and described as "ready to bloom for the holidays" belong to the allied genus Hippeastrum . The common name "naked lady" comes from the plant's pattern of flowering when the foliage has died down. This name is also used for other bulbs with
1081-469: 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
1128-552: The West Coast of the US since these environments mimic their native South African habitat. Hardiness zones 6–8. It is also naturalized in Australia. There is an Amaryllis belladonna hybrid which was bred in the 1800s in Australia. No one knows the exact species it was crossed with to produce color variations of white, cream, peach, magenta and nearly red hues. The hybrids were crossed back onto
1175-442: 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
1222-797: The debate, which took place from 1938 onwards and involved botanists on both sides of the Atlantic . The outcome was a decision by the 14th International Botanical Congress in 1987 that Amaryllis L. should be a conserved name (i.e. correct regardless of priority) and ultimately based on a specimen of the South African Amaryllis belladonna from the Clifford Herbarium at the Natural History Museum in London. As of October 2020, Amaryllis had only two accepted species, both native to
1269-678: The earlier ones as synonyms. This proposal was accepted in 2002. Larvae of the moth genera Brithys and Diaphone use Boophone as a food plant. Boophone disticha is used in South African traditional medicine by the Zulu people to induce hallucinations for divinatory purposes, and also for various mental illnesses. Its use, however, is limited by injuries that result from the plant's toxicity. They have also been used as ingredients in traditional arrow poisons, and medicinal dressings for skin lesions. A variety of alkaloids with affinity for
1316-446: 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
1363-727: 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,
1410-432: 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
1457-628: 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,
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1504-509: 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. Boophoninae See text Boophone is a small genus of herbaceous , perennial and bulbous plants in the Amaryllis family ( Amaryllidaceae , subfamily Amaryllidoideae . ) It consists of two confirmed species distributed across South Africa to Kenya and Uganda. It
1551-493: The main pollinators of amaryllis on the Cape Peninsula . The plant's main parasite is the lily borer Brithys crini and/or Diaphone eumela . Amaryllis belladonna was introduced into cultivation at the beginning of the eighteenth century. It reproduces slowly by either bulb division or seeds and has gradually naturalized from plantings in urban and suburban areas throughout the lower elevations and coastal areas in much of
1598-403: 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
1645-428: 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
1692-431: The original Amaryllis belladonna and with each other to produce naturally seed-bearing crosses that come in a very wide range of flower sizes, shapes, stem heights and intensities of pink. Pure white varieties with bright green stems were bred as well. The hybrids are quite distinct in that the many shades of pink also have stripes, veining, darkened edges, white centers and light yellow centers, also setting them apart from
1739-548: The original light pink. In addition, the hybrids often produce flowers in a fuller circle rather than the "side-facing" habit of the "old-fashioned" pink. The hybrids are able to adapt to year-round watering and fertilization but can also tolerate completely dry summer conditions if need be. A. belladonna has gained the Royal Horticultural Society 's Award of Garden Merit . Amaryllis belladonna has been crossed in cultivation with Crinum moorei to produce
1786-526: 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
1833-450: The seeds' large size and heavy weight. Strong winds shake loose the seeds, which fall to ground and immediately start to germinate, aided by the first winter rains. The leaves are produced in the autumn or early spring in warm climates depending on the onset of rain and eventually die down by late spring. The bulb is then dormant until late summer. The plant is not frost-tolerant, nor does it do well in tropical environments since they require
1880-497: 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,
1927-412: 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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1974-403: 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
2021-446: The time both South African and South American plants were placed in the same genus; subsequently they were separated into two different genera. The key question is whether Linnaeus's type was a South African plant or a South American plant. If the latter, Amaryllis would be the correct name for the genus Hippeastrum , and a different name would have to be used for the genus discussed here. Alan W. Meerow et al. have briefly summarized
2068-417: The top a cluster of two to twelve zygomorphic , funnel-shaped flowers without a tube. Each flower is 6–10 cm (2.4–3.9 in) in diameter with six spreading tepals (three outer sepals, three inner petals, with similar appearance to each other). The usual color is white with crimson veins, but pink or purple also occur naturally. Stamens are very shortly connate basally, declinate , unequal. Style
2115-566: 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
2162-429: 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
2209-603: Was confusion among botanists over the generic names Amaryllis and Hippeastrum , one result of which is that the common name 'amaryllis' is mainly used for cultivars of the genus Hippeastrum , widely sold in the winter months for their ability to bloom indoors. Plants of the genus Amaryllis are known as belladonna lily, Jersey lily, naked lady, amarillo, Easter lily in Southern Australia or, in South Africa, March lily due to its propensity to flower around March. This
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