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Oxytheca
''Oxytheca'' is a genus of plants in the family Polygonaceae with seven species found in dry and temperate parts of the Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th .... The taxonomy of this genus is in flux, with some species often listed under tentative new names. Species include: *'' Oxytheca dendroidea'' *'' Oxytheca parishii'' = '' Acanthoscyphus parishii'' *'' Oxytheca perfoliata'' *'' Oxytheca watsonii'' References External links Jepson Manual TreatmentUSDA Plants Profile Polygonaceae genera {{Polygonaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxytheca Watsonii
''Oxytheca'' is a genus of plants in the family Polygonaceae with seven species found in dry and temperate parts of the Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th .... The taxonomy of this genus is in flux, with some species often listed under tentative new names. Species include: *'' Oxytheca dendroidea'' *'' Oxytheca parishii'' = '' Acanthoscyphus parishii'' *'' Oxytheca perfoliata'' *'' Oxytheca watsonii'' References External links Jepson Manual TreatmentUSDA Plants Profile Polygonaceae genera {{Polygonaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxytheca Dendroidea
''Oxytheca'' is a genus of plants in the family Polygonaceae with seven species found in dry and temperate parts of the Americas. The taxonomy of this genus is in flux, with some species often listed under tentative new names. Species include: *'' Oxytheca dendroidea'' *'' Oxytheca parishii'' = '' Acanthoscyphus parishii'' *'' Oxytheca perfoliata'' *''Oxytheca watsonii ''Oxytheca'' is a genus of plants in the family Polygonaceae with seven species found in dry and temperate parts of the Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of No ...'' References External links Jepson Manual TreatmentUSDA Plants Profile Polygonaceae genera {{Polygonaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxytheca Perfoliata
''Oxytheca perfoliata'' is a species of flowering plant in the buckwheat family known by the common names round-leaf puncturebract and roundleaf oxytheca. It is native to the southwestern United States, where it is a common plant of the deserts and some woodland and valley areas. It is an annual herb producing a leafless stem up to about 20 centimeters in maximum height in the spring; during the winter the plant is a small rosette of oblong or spoon-shaped leaves a few centimeters wide. The plant is red-veined green, or often brown to maroon or magenta in color. The inflorescence atop the stem is punctuated by nodes at which the 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 usually different from foliage leaves. They may be smaller, larger, or of ...s are fused to form a cup or band up to about 2.5 centimeters wide. At the end of each branching of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxytheca Parishii
''Acanthoscyphus'' is a monotypic genus in the family Polygonaceae that contains the single species ''Acanthoscyphus parishii'', which is sometimes called Parish's oxytheca. This species is native and endemic to southern California. Taxonomy Four varieties of ''Acanthoscyphus parishii'' are recognized: *''A. p.'' var. ''abramsii'' (Abrams' oxytheca) is limited to the chaparral of mountain slopes in Santa Barbara and Ventura Counties *''A. p.'' var. ''cienegensis'' (Cienega Seca oxytheca) is known from only about six occurrences in the San Bernardino Mountains *''A. p.'' var. ''goodmaniana'' (Cushenbury oxytheca) is federally listed as an endangered species; it is known only from loose, rocky, limestone scree on steep north-facing slopes in the San Bernardino Mountains in an area highly disturbed by limestone mining operations *''A. p.'' var. ''parishii'' is found in sandy, gravelly habitat in the Transverse Ranges Description It is an annual herb producing a waxy, hairless, le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthoscyphus Parishii
''Acanthoscyphus'' is a monotypic genus in the family Polygonaceae that contains the single species ''Acanthoscyphus parishii'', which is sometimes called Parish's oxytheca. This species is native and endemic to southern California. Taxonomy Four varieties of ''Acanthoscyphus parishii'' are recognized: *''A. p.'' var. ''abramsii'' (Abrams' oxytheca) is limited to the chaparral of mountain slopes in Santa Barbara and Ventura Counties *''A. p.'' var. ''cienegensis'' (Cienega Seca oxytheca) is known from only about six occurrences in the San Bernardino Mountains *''A. p.'' var. ''goodmaniana'' (Cushenbury oxytheca) is federally listed as an endangered species; it is known only from loose, rocky, limestone scree on steep north-facing slopes in the San Bernardino Mountains in an area highly disturbed by limestone mining operations *''A. p.'' var. ''parishii'' is found in sandy, gravelly habitat in the Transverse Ranges Description It is an annual herb producing a waxy, hairless, le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygonaceae
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus ''Polygonum'', and was first used by Antoine Laurent de Jussieu in 1789 in his book, ''Genera Plantarum''.Antoine Laurent de Jussieu. 1789. ''Genera plantarum: secundum ordines naturales disposita, juxta methodum in Horto regio parisiensi exaratam''. page 82. Herrisant and Barrois: Paris, France. (see ''External links'' below) The name may refer to the many swollen nodes the stems of some species have, being derived from Greek, ''poly'' meaning 'many' and ''gony'' meaning 'knee' or 'joint'. Alternatively, it may have a different derivation, meaning 'many seeds'. The Polygonaceae comprise about 1200 speciesDavid J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. distributed into about 48 genera. The largest genera are ''Eriogonum'' (240 species), ''Rumex'' (20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Nuttall
Thomas Nuttall (5 January 1786 – 10 September 1859) was an England, English botany, botanist and zoologist who lived and worked in America from 1808 until 1841. Nuttall was born in the village of Long Preston, near Settle, North Yorkshire, Settle in the West Riding of Yorkshire and spent some years as an apprentice printer in England. Soon after going to the United States he met professor Benjamin Smith Barton in Philadelphia. Barton encouraged his strong interest in natural history. Early explorations in the United States In 1810 he travelled to the Great Lakes and in 1811 travelled on the Astor Expedition led by William Price Hunt on behalf of John Jacob Astor up the Missouri River. Nuttall was accompanied by the English botanist John Bradbury (naturalist), John Bradbury, who was collecting plants on behalf of Liverpool botanical gardens. Nuttall and Bradbury left the party at the trading post with the Arikara Indians in South Dakota, and continued farther upriver with Rams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), 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 the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant
Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). By one definition, plants form the clade Viridiplantae (Latin name for "green plants") which is sister of the Glaucophyta, and consists of the green algae and Embryophyta (land plants). The latter includes the flowering plants, conifers and other gymnosperms, ferns and their allies, hornworts, liverworts, and mosses. Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic or mycotrophic and have lost the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Americas
The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with their associated islands, the Americas cover 8% of Earth's total surface area and 28.4% of its land area. The topography is dominated by the American Cordillera, a long chain of mountains that runs the length of the west coast. The flatter eastern side of the Americas is dominated by large river basins, such as the Amazon, St. Lawrence River–Great Lakes basin, Mississippi, and La Plata. Since the Americas extend from north to south, the climate and ecology vary widely, from the arctic tundra of Northern Canada, Greenland, and Alaska, to the tropical rain forests in Central America and South America. Humans first settled the Americas from Asia between 42,000 and 17,000 years ago. A second migration of Na-Dene speakers followed later ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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