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Draba Serpentina
''Draba serpentina'' is a species of flowering plant in the family Brassicaceae known by the common name serpentine draba. It is endemic to Nevada in the United States, where it occurs in the Snake Range in White Pine County and the Toiyabe Range of Lander County.''Draba serpentina''. Flora of North America. Until 2007 this was treated as a variety of '' Draba oreibata''. The two were separated because they are different in |
Brassicaceae
Brassicaceae () or (the older) Cruciferae () is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The leaves are simple (although are sometimes deeply incised), lack stipules, and appear alternately on stems or in rosettes. The inflorescences are terminal and lack bracts. The flowers have four free sepals, four free alternating petals, two shorter free stamens and four longer free stamens. The fruit has seeds in rows, divided by a thin wall (or septum). The family contains 372 genera and 4,060 accepted species. The largest genera are ''Draba'' (440 species), ''Erysimum'' (261 species), ''Lepidium'' (234 species), ''Cardamine'' (233 species), and ''Alyssum'' (207 species). The family contains the cruciferous vegetables, including species such as ''Brassica oleracea'' (cultivated as cabbage, kale, cauliflower, broccoli and collards), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nevada
Nevada ( ; ) is a U.S. state, state in the Western United States, Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the List of U.S. states and territories by area, 7th-most extensive, the List of U.S. states and territories by population, 32nd-most populous, and the List of U.S. states and territories by population density, 9th-least densely populated of the U.S. states. Nearly three-quarters of Nevada's people live in Clark County, Nevada, Clark County, which contains the Las Vegas–Paradise, NV MSA, Las Vegas–Paradise metropolitan area, including three of the state's four largest incorporated cities. Nevada's capital is Carson City, Nevada, Carson City. Las Vegas is the largest city in the state. Nevada is officially known as the "Silver State" because of the importance of silver to its history and economy. It is also known as the "Battle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snake Range
The Snake Range is a mountain range in White Pine County, Nevada, United States. The south-central portion of the range is included within Great Basin National Park, with most of the remainder included within the Humboldt-Toiyabe National Forest. The range reaches a maximum elevation of at the summit of Wheeler Peak, the tallest independent mountain within Nevada and the second highest point within the state (the highest point being Boundary Peak). The range also contains four of the five highest mountain peaks in Nevada, including all peaks greater than except for Boundary Peak. Geography Typical of other ranges in the Basin and Range Province, the Snake Range runs in a north-south direction, for approximately . To the west are Spring Valley and the Schell Creek Range, and to the east across the Utah border are Snake Valley and the Confusion Range. Sacramento Pass () is where U.S. Route 6- 50, the "Loneliest Highway in America", crosses the range. It is the principal me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Pine County, Nevada
White Pine County is a largely rural, mountain county along the central eastern boundary of the U.S. state of Nevada. As of the 2010 census, the population was 10,030. Its county seat is Ely. The name "(Rocky Mountain) white pine" is an old name for the limber pine (''Pinus flexilis''), a common tree in the county's mountains. The county boasts dark skies, clean air and millions of acres of unspoiled public land. It is the home of Great Basin National Park, one of America's most remote and least visited national parks. It is also home to no less than 14 federally designated wilderness areas, offering an abundance of terrain available to explore for hikers, backpackers, skiers, hunters and anglers. The Ely Shoshone Indian Reservation is located in the county, on the south side of the City of Ely. The reservation has a land area of 104.99 acres (0.4249 km2) and a 2000 census official resident population of 133 people. History European settlement in White Pine County be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toiyabe Range
The Toiyabe Range is a mountain range in Lander and Nye counties, Nevada, United States. Most of the range is included within the Humboldt-Toiyabe National Forest. The highest point in the range, near its southern end, is Arc Dome (11,788 feet, 3592 m), an area protected as the Arc Dome Wilderness. The highest point in Lander County, Bunker Hill, is also located within the Toiyabe Range. The range starts in northwestern Nye County north of Tonopah, Nevada and runs approximately 120 miles (190 km) north-northeast into southern Lander County, making it the second longest range in the state. Geography Although the Toiyabe Range is in the rain shadow of the higher Sierra Nevada (U.S.) range to the west and is too arid to support forests except for scattered pines, the climate was cold and snowy enough during the Pleistocene to develop alpine glaciers in several places, with cirques, moraines, and other glacial features still apparent. There are numerous hiking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lander County, Nevada
Lander County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 5,734. Its county seat is Battle Mountain. History Lander County was created in 1862 as the result of a mining boom on the Reese River along the old pony express line, taking a considerable portion of Churchill and Humboldt counties with it. Named for Frederick W. Lander, chief engineer of a federal wagon route and Special Indian Agent in the area, it was one of the original 11 counties of Nevada when statehood was granted in 1864. Its first county seat was Jacob's Spring in 1862, which was moved to Austin in 1863, and finally Battle Mountain in 1979. Eventually, Lander County would be known as the "mother of counties", since three other counties in Nevada were later formed from it: Elko, White Pine, and Eureka. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.5%) is water. The summit of Bunker Hill, located in the To ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxon
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's Linnaean taxonomy, system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard de Jussieu, Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first mad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variety (botany)
In botanical nomenclature, variety (abbreviated var.; in la, varietas) is a taxonomic rank below that of species and subspecies, but above that of form. As such, it gets a three-part infraspecific name. It is sometimes recommended that the subspecies rank should be used to recognize geographic distinctiveness, whereas the variety rank is appropriate if the taxon is seen throughout the geographic range of the species. Example The pincushion cactus, ''Escobaria vivipara'' (Nutt.) Buxb., is a wide-ranging variable species occurring from Canada to Mexico, and found throughout New Mexico below about . Nine varieties have been described. Where the varieties of the pincushion cactus meet, they intergrade. The variety ''Escobaria vivipara'' var. ''arizonica'' is from Arizona, while ''Escobaria vivipara'' var. ''neo-mexicana'' is from New Mexico. See also '' Capsicum annuum var. glabriusculum'' Definitions The term is defined in different ways by different authors. However, the I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draba Oreibata
''Draba'' is a large genus of flowering plants in the family Brassicaceae, commonly known as whitlow-grasses (though they are not related to the true grasses). Species There are over 400 species: *'' Draba abajoensis'' Windham & Al-Shehbaz *'' Draba × abiskoensis'' O.E.Schulz *'' Draba × abiskojokkensis'' O.E.Schulz *''Draba acaulis'' Boiss. *'' Draba affghanica'' Boiss. *''Draba aizoides'' L. *''Draba alajica'' Litv. *''Draba alberti'' Regel & Schmalh. *''Draba albertina'' Greene *''Draba alchemilloides'' Gilg *''Draba × algida'' Adams ex DC. *''Draba alpina'' L. *''Draba altaica'' (C.A.Mey.) Bunge *''Draba alticola'' Kom. *''Draba alyssoides'' Humb. & Bonpl. ex DC. *''Draba × amandae'' O.E.Schulz *''Draba × ambigua'' Ledeb. *''Draba amoena'' O.E.Schulz *''Draba amplexicaulis'' Franch. *''Draba aprica'' Beadle *''Draba arabisans'' Michx. *''Draba araboides'' Wedd. *''Draba araratica'' Rupr. *''Draba arauquensis'' Santana *''Draba arbuscula'' Hook.f. *'' Draba arctogena'' (E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Friedrich Burdach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated ( S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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