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Physaria Pallida
''Physaria pallida'' (syn. ''Lesquerella pallida'') is a rare species of flowering plant in the mustard family known by the common name white bladderpod. It is endemic to Texas in the United States, where it is known only from San Augustine County.''Physaria pallida''. Texas Parks & Wildlife It is federally listed as an . Description This is an annual growing mostly erect to a height of 30 to 60 centimeters. The leaves may b ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Torrey
John Torrey (August 15, 1796 – March 10, 1873) was an American botany, botanist, chemist, and physician. Throughout much of his career, he was a teacher of chemistry, often at multiple universities, while he also pursued botanical work, focusing on the flora of North America. His most renowned works include studies of the New York flora, the Mexican Boundary, the Pacific railroad surveys, and the uncompleted ''Flora of North America''. Biography Torrey was born in New York City, the second child of Capt. William and Margaret (née Nichols) Torrey.Robbins, C. C. (1968). John Torrey (1796–1873), His Life & Times. ''Bulletin of the Torrey Botanical Club''. Vol. 95, No. Nov. 6–Dec. 1968, 515–645. Torrey Botanical Club, New York. He showed a fondness for mechanics, and at one time planned to become a machinist. When he was 15 or 16, his father received an appointment to the state prison at Greenwich Village, New York, where he was tutored by Amos Eaton, then a pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob Wer ... [...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] |
Habitat Conservation
Habitat conservation is a management practice that seeks to conserve, protect and restore habitats and prevent species extinction, fragmentation or reduction in range. It is a priority of many groups that cannot be easily characterized in terms of any one ideology. History of the conservation movement For much of human history, ''nature'' was seen as a resource that could be controlled by the government and used for personal and economic gain. The idea was that plants only existed to feed animals and animals only existed to feed humans. The value of land was limited only to the resources it provided such as fertile soil, timber, and minerals. Throughout the 18th and 19th centuries, social views started to change and conservation principles were first practically applied to the forests of British India. The conservation ethic that began to evolve included three core principles: 1) human activities damage the environment, 2) there was a civic duty to maintain the environment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecological Succession
Ecological succession is the process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire) or more or less. Bacteria allows for the cycling of nutrients such as carbon, nitrogen and sulphur. The community begins with relatively few pioneering plants and animals and develops through increasing complexity until it becomes stable or self-perpetuating as a climax community. The "engine" of succession, the cause of ecosystem change, is the impact of established organisms upon their own environments. A consequence of living is the sometimes subtle and sometimes overt alteration of one's own environment. Succession is a process by which an ecological community undergoes more or less orderly and predictable changes following a disturbance or the initial colonization of a new habitat. Succession may be initiated either by formation of new, unoccupied habitat, such as from a lava flow or a severe lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravel
Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classified by particle size range and includes size classes from granule- to boulder-sized fragments. In the Udden-Wentworth scale gravel is categorized into granular gravel () and pebble gravel (). ISO 14688 grades gravels as fine, medium, and coarse, with ranges 2–6.3 mm to 20–63 mm. One cubic metre of gravel typically weighs about 1,800 kg (or a cubic yard weighs about 3,000 lb). Gravel is an important commercial product, with a number of applications. Almost half of all gravel production is used as aggregate for concrete. Much of the rest is used for road construction, either in the road base or as the road surface (with or without asphalt or other binders.) Naturally occurring porous gravel deposits have a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuphea Viscosissima
''Cuphea viscosissima'', also known as blue waxweed, clammy cuphea or (ambiguously) as " tarweed", is an herbaceous plant in the loosestrife family. It native to the eastern United States, where it is most often found in open, rocky calcareous areas. It is the most common and widespread ''Cuphea'' in the U.S. This species is notable for its sticky stems. It produces a purple-red flower in late summer. Flowers attract butterflies and hummingbirds. This species is morphological similar to ''Cuphea lanceolata ''Cuphea lanceolata'', also known as the cigar flower, is an annual herbaceous flowering plant in the genus ''Cuphea'' of the family Lythraceae. Description ''Cuphea lanceolata'' reaches on average a height of . It has a branched stem with oppos ...'', which is found in Mexico. It can be distinguished from ''Cuphea lanceolata'' by its smaller flower. References viscosissima Flora of the United States Plants described in 1772 Taxa named by Nikolaus Joseph von Jac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eleocharis Compressa
''Eleocharis'' is a virtually cosmopolitan genus of 250 or more species of flowering plants in the sedge family, Cyperaceae. The name is derived from the Greek words ἕλειος (''heleios''), meaning "marsh dweller," and χάρις (''charis''), meaning "grace." Members of the genus are known commonly as spikerushes or spikesedges. The genus has a geographically cosmopolitan distribution, with centers of diversity in the Amazon Rainforest and adjacent eastern slopes of the South American Andes, northern Australia, eastern North America, California, Southern Africa, and subtropical Asia. The vast majority of ''Eleocharis'' species grow in aquatic or mesic habitats from sea level to higher than 5,000 meters in elevation (in the tropical Andes). The genus itself is relatively easy to recognize; all ''Eleocharis'' species have photosynthetic stems but no green leaves (the leaves have been reduced to sheaths surrounding the base of the stems). Many species are robust, rhizomatously ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliotropium Tenellum
''Heliotropium tenellum'', the pasture heliotrope, is a species of plant in the heliotrope family. It is native to southeastern and south-central North America, where it is found in limestone glades and rocky prairies. It is an annual Annual may refer to: * Annual publication, periodical publications appearing regularly once per year **Yearbook ** Literary annual * Annual plant * Annual report * Annual giving * Annual, Morocco, a settlement in northeastern Morocco * Annuals (b ... species that produces white flowers in the summer. References {{Taxonbar, from=Q15491966 tenellum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petalostemum Pulcherrimum
''Dalea'' is a genus of flowering plants in the legume family, Fabaceae. Members of the genus are commonly known as prairie clover or indigo bush. Its name honors English apothecary Samuel Dale (1659–1739). They are native to the Western hemisphere, where they are distributed from Canada to Argentina. Nearly half of the known species are endemic to Mexico. Two species of ''Dalea'' (''Dalea ornata'' and ''Dalea searlsiae'') have been considered for rangeland restoration. Species ''Dalea'' comprises the following species: * '' Dalea abietifolia'' (Rydb.) Bullock * '' Dalea acracarpica'' Barneby * '' Dalea adenopoda'' (Rydb.) Isely—Tampa prairie clover * '' Dalea aenigma'' Barneby * '' Dalea albiflora'' A. Gray—whiteflower prairie clover * '' Dalea ananassa'' Barneby * '' Dalea antana'' J.F. Macbr. * '' Dalea arenicola'' (Wemple) B.L. Turner * '' Dalea aurea'' C. Fraser—golden prairie clover * ''Dalea austrotexana'' B.L.Turner * '' Dalea ayavacensis' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paronychia Virginica
Paronychia is an inflammation of the skin around the nail, which can occur suddenly, when it is usually due to the bacterium ''Staphylococcus aureus'', or gradually when it is commonly caused by the fungus '' Candida albicans''. The term is from el, παρωνυχία from ''para'' 'around', ''onyx'' 'nail', and the abstract noun suffix '' -ia''. Risk factors include repeatedly washing hands and trauma to the cuticle such as may occur from repeated nail biting or hangnails. Treatment includes antibiotics and antifungals, and if pus is present, the consideration of incision and drainage. Paronychia is commonly misapplied as a synonym for herpetic whitlow or felon. Definition and etymology Paronychia is an inflammation of the skin around the nail, which can occur suddenly (acute), when it is usually due to the bacterium ''Staphylococcus aureus'', or gradually (chronic) when it is commonly caused by ''Candida albicans''. The term is from el, παρωνυχία from ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liatris Mucronata
''Liatris'' (), commonly known as gayfeather and blazing star. is a genus of flowering plants in the tribe Eupatorieae within the family Asteraceae native to North America (Canada, United States, Mexico and the Bahamas). Some species are used as ornamental plants, sometimes in flower bouquets. They are perennials, surviving the winter in the form of corms. ''Liatris'' species are used as food plants by the larvae of some Lepidoptera species including the flower moths ''Schinia gloriosa'' and ''Schinia sanguinea'', both of which feed exclusively on the genus, and ''Schinia tertia'' and ''Schinia trifascia''. Classification ''Liatris'' is in the tribe Eupatorieae of the aster family. Like other members of this tribe, the flower heads have disc florets and no ray florets. ''Liatris'' is in the subtribe Liatrinae along with ''Trilisa'', ''Carphephorus'', and other genera. ''Liatris'' is closely related to ''Garberia'', a genus with only one species endemic to Florida. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
