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Hazenia
''Hazenia'' is a genus of green algae in the family Gayraliaceae. The genus name of ''Hazenia'' is in honour of Tracy Elliot Hazen (1874–1943), who was an American botanist and author specializing in the study of fresh water sourced algae. The genus was circumscribed by Harold Charles Bold Harold Charles Bold (1909–1987) was an American botanist. Early life Bold was born on June 16, 1909, in New York City to Edward Bold and Louise (Krüsi) Bold. He earned his Bachelor of Arts from Columbia University in 1929, Phi Beta Kappa., ... in Amer. J. Bot. vol.45 on page 742 in 1958. References External links Ulvophyceae genera Ulotrichales {{Green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazenia Mirabilis
''Hazenia'' is a genus of green algae in the family Gayraliaceae. The genus name of ''Hazenia'' is in honour of Tracy Elliot Hazen (1874–1943), who was an American botanist and author specializing in the study of fresh water sourced algae. The genus was circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ... by Harold Charles Bold in Amer. J. Bot. vol.45 on page 742 in 1958. References External links Ulvophyceae genera Ulotrichales {{Green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tracy Elliot Hazen
Tracy Elliot Hazen (July 4, 1874 – March 16, 1943) was an American botanist and author specializing in the study of fresh water algae. In 1958, botanist Harold Charles Bold published ''Hazenia'', which is a genus of green algae in the family Gayraliaceae Gayraliaceae is a family of green algae in the order Ulotrichales. References Ulvophyceae families Ulotrichales {{Green algae-stub .... Works * * * References 1874 births 1943 deaths 19th-century American botanists 20th-century American botanists {{US-botanist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gayraliaceae
Gayraliaceae is a family of green algae in the order Ulotrichales Ulotrichales is an order of green algae in the class Ulvophyceae.See the NCBIbr>webpage on Ulotrichales Data extracted from the Genera unplaced to family (''incertae sedis''): *'' Trichosarcina'' Families * '' Binucleariaceae'' * '' Collins .... References Ulvophyceae families Ulotrichales {{Green algae-stub ... [...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] |
Green Algae
The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to properly include them. The completed clade that includes both green algae and embryophytes is monophyletic and is referred to as the clade Viridiplantae and as the kingdom Plantae. The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds. A few other organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanist
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (''botanē'') meaning "pasture", " herbs" "grass", or " fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – edible, med ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Author
An author is the writer of a book, article, play, mostly written work. A broader definition of the word "author" states: "''An author is "the person who originated or gave existence to anything" and whose authorship determines responsibility for what was created''." Typically, the first owner of a copyright is the person who created the work, i.e. the author. If more than one person created the work (i.e., multiple authors), then a case of joint authorship takes place. The copyright laws are have minor differences in various jurisdictions across the United States. The United States Copyright Office, for example, defines copyright as "a form of protection provided by the laws of the United States (title 17, U.S. Code) to authors of 'original works of authorship.'" Legal significance of authorship Holding the title of "author" over any "literary, dramatic, musical, artistic, rcertain other intellectual works" gives rights to this person, the owner of the copyright, especially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresh Water
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include non- salty mineral-rich waters such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algae
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Charles Bold
Harold Charles Bold (1909–1987) was an American botanist. Early life Bold was born on June 16, 1909, in New York City to Edward Bold and Louise (Krüsi) Bold. He earned his Bachelor of Arts from Columbia University in 1929, Phi Beta Kappa., his Master of Science from the University of Vermont in 1931, and his Ph.D in botany in 1933 at Columbia. He married Mary E. Douthit on June 8, 1943. He worked at the University of Vanderbilt from 1932 to 1939 and again from 1945 to 1957. From 1939 to 1945 he was at Columbia. After 1957 he taught botany at the University of Texas at Austin. He was the director of the Botanical Society of America in 1955 and the director of The American Journal of Botany from 1958 to 1965. His work focused on sub-aerial and soil algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amer , a town in Sindh province of Pakistan
{{disambiguation, geo ...
Amer may refer to: Places * Amer (river), a river in the Dutch province of North Brabant * Amer, Girona, a municipality in the province of Girona in Catalonia, Spain * Amber, India (also known as Amer, India), former city of Rajasthan state ** Amber Fort (also Amer Fort), India * AMER, a country grouping that refers to America or the Americas People * Amer (name) * Beni-Amer people, a mixed ethnic group inhabiting Sudan and Eritrea Other uses * Amer International Group, a Chinese company * Amer Sports, a Finnish headquartered sporting goods company * ''Amer'' (film), a 2009 Belgian-French thriller See also * Umerkot Umerkot (formerly known as Amarkot) is a city in the Sindh province of Pakistan. The local language is Dhatki, which is one of the Rajasthani languages of the Indo-Aryan language family. It is most closely related to Marwari. Sindhi, Urdu and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
