|
Hibiscus Dasycalyx
''Hibiscus dasycalyx'' is a species of hibiscus known by the common name Neches River rosemallow. It is endemism, endemic to Texas in the United States, where there are three remaining natural populations and three introduced populations.''Hibiscus dasycalyx''. The Nature Conservancy. This woody perennial herb grows up to 2.3 meters tall. The leaves are T-shaped and have three lobes. The flower is white to pink in color with a deep red center. The five petals are up to four inches (10 cm) long. The sepals and bracteoles are fuzzy-haired. Flowering occurs in June through August, or into October when enough moisture is available. The seeds float on water. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidney Fay Blake
Sidney Fay Blake (1892–1959) was an American botanist and plant taxonomist, "recognized as one of the world's experts on botanical nomenclature." Biography Blake was born in 1892 in Stoughton, Massachusetts. In 1912, he received a bachelor's degree from Harvard University, a master's degree in 1913, and a Ph.D. in botany in 1917 with a thesis on ''Viguiera''. The same year he received his Ph.D., he started his botanical career at the Bureau of Plant Industry (United States), Bureau of Plant Industry for the United States Department of Agriculture, and worked there till he died in 1959. In 1943 he was elected president of the American Society of Plant Taxonomists. Blake published many articles and monographs but only one two-volume work, ''Geographical Guide to Floras of the World''. The first volume, co-authored by Alice C. Atwood (1876–1947), was published in 1942. The second volume, written by Blake alone, was published in 1961 two years after his death. He married the en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floodplain
A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudie, A. S., 2004, ''Encyclopedia of Geomorphology'', vol. 1. Routledge, New York. The soils usually consist of clays, silts, sands, and gravels deposited during floods. Because the regular flooding of floodplains can deposit nutrients and water, floodplains frequently have high soil fertility; some important agricultural regions, such as the Mississippi river basin and the Nile, rely heavily on the flood plains. Agricultural regions as well as urban areas have developed near or on floodplains to take advantage of the rich soil and fresh water. However, the risk of flooding has led to increasing efforts to control flooding. Formation Most floodplains are formed by deposition on the inside of river meanders and by overbank flow. Whereve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Swamping
Genetic pollution is a controversial term for uncontrolled gene flow into wild populations. It is defined as "the dispersal of contaminated altered genes from genetically engineered organisms to natural organisms, esp. by cross-pollination", but has come to be used in some broader ways. It is related to the population genetics concept of gene flow, and genetic rescue, which is genetic material intentionally introduced to increase the fitness of a population. It is called genetic pollution when it negatively impacts the fitness of a population, such as through outbreeding depression and the introduction of unwanted phenotypes which can lead to extinction. Conservation biologists and conservationists have used the term to describe gene flow from domestic, feral, and non-native species into wild indigenous species, which they consider undesirable. They promote awareness of the effects of introduced invasive species that may "''hybridize with native species, causing genetic pollutio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hibiscus Laevis
''Hibiscus laevis'' ( syn. ''Hibiscus militaris''), the halberd-leaf rosemallow, is a herbaceous perennial flower native to central and eastern North America. Their showy, creamy-white or pink flowers are large, up to across, and are hard to miss. These flowers require exposure to sunlight to open up properly, and then last only a single day. The unbranched stems of this plant are round and hairless, frequently growing to tall and sometimes taller. The root system includes a taproot. The hairless leaves are alternate, long, divided into 3–5 pointed lobes (cleft) and have serrate or crenate edges. They are simple and pointed at the tip. The leaves with three lobes resemble a medieval halberd because the middle lobe is much larger than the two side lobes. The five-lobed leaves also look like halberds or daggers. Flowers are solitary or occur in small clusters at the tops of the upper stems. They are fairly large, about across when fully open. They are mostly white or light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wetland
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The primary factor that distinguishes wetlands from terrestrial land forms or Body of water, water bodies is the characteristic vegetation of aquatic plants, adapted to the unique anoxic hydric soils. Wetlands are considered among the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal species. Methods for assessing wetland functions, wetland ecological health, and general wetland condition have been developed for many regions of the world. These methods have contributed to wetland conservation partly by raising public awareness of the functions some wetlands provide. Wetlands occur naturally on every continent. The water in wetlands is either freshwater, brackish or seawater, saltwater. The main w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbicide
Herbicides (, ), also commonly known as weedkillers, are substances used to control undesired plants, also known as weeds.EPA. February 201Pesticides Industry. Sales and Usage 2006 and 2007: Market Estimates. Summary in press releasMain page for EPA reports on pesticide use ihere Selective herbicides control specific weed species, while leaving the desired crop relatively unharmed, while non-selective herbicides (sometimes called total weedkillers in commercial products) can be used to clear waste ground, industrial and construction sites, railways and railway embankments as they kill all plant material with which they come into contact. Apart from selective/non-selective, other important distinctions include ''persistence'' (also known as ''residual action'': how long the product stays in place and remains active), ''means of uptake'' (whether it is absorbed by above-ground foliage only, through the roots, or by other means), and ''mechanism of action'' (how it works). Historica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundwater
Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table. Groundwater is recharged from the surface; it may discharge from the surface naturally at springs and seeps, and can form oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction wells. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology. Typically, groundwater is thought of as water flowing through shallow aquifers, but, in the technical sense, it can also contain soil moisture, perma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swamp
A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Swamps are considered to be transition zones because both land and water play a role in creating this environment. Swamps vary in size and are located all around the world. The water of a swamp may be fresh water, brackish water, or seawater. Freshwater swamps form along large rivers or lakes where they are critically dependent upon rainwater and seasonal flooding to maintain natural water level fluctuations.Hughes, F.M.R. (ed.). 2003. The Flooded Forest: Guidance for policy makers and river managers in Europe on the restoration of floodplain forests. FLOBAR2, Department of Geography, University of Cambridge, Cambridge, UK. 96 p. Saltwater swamps are found along tropical and subtropical coastlines. Some swamps have hammock (ecology), hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trinity County, Texas
Trinity County is a county located in the U.S. state of Texas. As of the 2020 census, the population was 13,602. Its county seat is Groveton. The county is named for the Trinity River. Trinity County is included in the Huntsville, TX Micropolitan Statistical Area, which is also included in the Houston- The Woodlands, TX Combined Statistical Area. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.9%) is water. Adjacent counties * Angelina County (northeast) * Polk County (southeast) * San Jacinto County (south) * Walker County (southwest) * Houston County (northwest) National protected area * Davy Crockett National Forest (part) Demographics ''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.'' As of the census of 2000, there were 13,779 people, 5,723 households, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivan Shiller
Ivan () is a Slavic male given name, connected with the variant of the Greek name (English: John) from Hebrew meaning 'God is gracious'. It is associated worldwide with Slavic countries. The earliest person known to bear the name was Bulgarian tsar Ivan Vladislav. It is very popular in Russia, Ukraine, Croatia, Serbia, Bosnia and Herzegovina, Slovenia, Bulgaria, Belarus, North Macedonia, and Montenegro and has also become more popular in Romance-speaking countries since the 20th century. Etymology Ivan is the common Slavic Latin spelling, while Cyrillic spelling is two-fold: in Bulgarian, Russian, Macedonian, Serbian and Montenegrin it is Иван, while in Belarusian and Ukrainian it is Іван. The Old Church Slavonic (or Old Cyrillic) spelling is . It is the Slavic relative of the Latin name , corresponding to English '' John''. This Slavic version of the name originates from New Testament Greek (''Iōánnēs'') rather than from the Latin . The Greek name is in tu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Houston County, Texas
Houston County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 22,066. Its county seat is Crockett. Houston County was one of 46 entirely dry counties in the state of Texas, until voters in a November 2007 special election legalized the sale of alcohol in the county. Houston County was the first new county created under the 9-year Republic of Texas on June 12, 1837. The original boundaries of Houston County also included all of present-day Anderson and Trinity Counties, and portions of present-day Henderson and Polk Counties. The county is named for Sam Houston, President of the Republic of Texas and Governor of Texas. Other than being named for the same person, Houston County is not related to the City of Houston, which is located about to the south, in Harris County. A county historical museum is located in a former railroad depot, located on First Street in Crockett. History Samuel Cartmill Hiroms (1836–1920) was born in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.PNG "Click for more on -> Groundwater")
