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Bonamia Grandiflora
''Bonamia grandiflora'' is a rare species of flowering plant in the morning glory family known by the common names Florida lady's nightcap, Florida bonamia, and scrub morning glory. It is endemic to Central Florida, where there are about 100 known populations remaining, many of which are within the bounds of the Ocala National Forest.Center for Plant Conservation The plant has declined in recent decades primarily due to the development of its habitat, which is being converted to urban zones and groves. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asa Gray
Asa Gray (November 18, 1810 – January 30, 1888) is considered the most important American botanist of the 19th century. His ''Darwiniana'' was considered an important explanation of how religion and science were not necessarily mutually exclusive. Gray was adamant that a genetic connection must exist between all members of a species. He was also strongly opposed to the ideas of hybridization within one generation and special creation in the sense of its not allowing for evolution. He was a strong supporter of Darwin, although Gray's theistic evolution was guided by a Creator. As a professor of botany at Harvard University for several decades, Gray regularly visited, and corresponded with, many of the leading natural scientists of the era, including Charles Darwin, who held great regard for him. Gray made several trips to Europe to collaborate with leading European scientists of the era, as well as trips to the southern and western United States. He also built an extensive ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florida Scrub
Florida sand pine scrub is an endangered subtropical forest ecoregion found throughout Florida in the United States. It is found on coastal and inland sand ridges and is characterized by an evergreen xeromorphic plant community dominated by shrubs and dwarf oaks. Because the low-nutrient sandy soils do not retain moisture, the ecosystem is effectively an arid one. Wildfires infrequently occur in the Florida scrub. Most of the annual rainfall (about ) falls in summer. It is endangered by residential, commercial and agricultural development, with the largest remaining block in and around the Ocala National Forest. Lake Wales Ridge National Wildlife Refuge also holds a high proportion of remaining scrub habitat, while the Archbold Biological Station near Lake Placid contains about of scrub habitat and sponsors biological research on it. Plant communities There is a high level of endemism in the flora and fauna, including an estimated 40 species of plants, 4 vertebrates and at least ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Controlled Burn
A controlled or prescribed burn, also known as hazard reduction burning, backfire, swailing, or a burn-off, is a fire set intentionally for purposes of forest management, farming, prairie restoration or greenhouse gas abatement. A controlled burn may also refer to the intentional burning of slash and fuels through burn piles. Fire is a natural part of both forest and grassland ecology and controlled fire can be a tool for foresters. Hazard reduction or controlled burning is conducted during the cooler months to reduce fuel buildup and decrease the likelihood of serious hotter fires. Controlled burning stimulates the germination of some desirable forest trees, and reveals soil mineral layers which increases seedling vitality, thus renewing the forest. Some cones, such as those of lodgepole pine and sequoia, are pyriscent, as well as many chaparral shrubs, meaning they require heat from fire to open cones to disperse seeds. In industrialized countries, controlled burning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Suppression
Wildfire suppression is a range of firefighting tactics used to suppress wildfires. Firefighting efforts in wild land areas require different techniques, equipment, and training from the more familiar structure fire fighting found in populated areas. Working in conjunction with specially designed aerial firefighting aircraft, these wildfire-trained crews suppress flames, construct fire break, fire lines, and extinguish flames and areas of heat to protect resources and natural wilderness. Wildfire suppression also addresses the issues of the wildland–urban interface, where populated areas border with wild land areas. In the United States and other countries, aggressive wildfire suppression aimed at minimizing fire has contributed to accumulation of fuel loads, increasing the risk of large, catastrophic fires. History Australia Wildland fire, known in Australia as bush fire, has played a major role in Australia due to arid conditions. Notable fire services tasked with wildfire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canopy (biology)
In biology, the canopy is the aboveground portion of a plant cropping or crop, formed by the collection of individual plant crowns. In forest ecology, canopy also refers to the upper layer or habitat zone, formed by mature tree crowns and including other biological organisms ( epiphytes, lianas, arboreal animals, etc.). The communities that inhabit the canopy layer are thought to be involved in maintaining forest diversity, resilience, and functioning. Sometimes the term canopy is used to refer to the extent of the outer layer of leaves of an individual tree or group of trees. Shade trees normally have a dense canopy that blocks light from lower growing plants. Observation Early observations of canopies were made from the ground using binoculars or by examining fallen material. Researchers would sometimes erroneously rely on extrapolation by using more reachable samples taken from the understory. In some cases, they would use unconventional methods such as chairs susp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wildfire
A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of Combustibility and flammability, combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire(bushfires in Australia, in Australia), desert fire, grass fire, hill fire, peat fire, prairie fire, vegetation fire, or veld fire. Fire ecology, Some natural forest ecosystems depend on wildfire. Wildfires are distinct from beneficial human usage of wildland fire, called controlled burn, controlled burning, although controlled burns can turn into wildfires. Fossil charcoal indicates that wildfires began soon after the appearance of terrestrial plants approximately 419 million years ago during the Silurian period. Earth's carbon-rich vegetation, seasonally dry climates, atmospheric oxygen, and widespread lightning and volcanic ignitions create favorable conditions for fires. The occurre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lupinus Aridorum
''Lupinus aridorum'' is a rare species of lupine known by the common name scrub lupine. It is endemic to Florida in the United States, where there were 10 known populations remaining in 2003.USFWSScrub lupine Five-year Review.November 2007. Fewer than 6000 individual plants were counted. It is threatened by the loss and degradation of its habitat. The scrub lupine is a federally listed endangered species of the United States. This plant was first collected in 1900, but it was not described until 1982 to science as a species.USFWSEndangered status for ''Lupinus aridorum'' (Scrub Lupine).April 7, 1987. It is often treated as a variety of '' Lupinus westianus''. The scrub lupine is a biennial or perennial herb growing up to a meter tall. The leaves are oval with pointed tips, not palmate as in most other lupines. Each leaf blade may be up to 7 centimeters long by 4 wide and is borne on a long petiole. The herbage is coated in silvery hairs. The inflorescence is a raceme-like spike ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus Geniculata
''Prunus geniculata'' is a rare species of plum known by the common name scrub plum. The species is endemic to Florida. Description This plant is a low, rounded shrub with a gnarled trunk emerging from the sand and branching densely to form a mound up to two meters tall. The zig-zagging, angled, sharp-tipped branches are sometimes buried in sand and emerge covered in lichens. The gray bark cracks, revealing new reddish brown bark beneath. The alternately arranged leaves have smooth blades 1 to 3 centimeters long with wavy or toothed edges. Blooming occurs before the leaves appear. The flowers are usually solitary. They have five red sepals and five white petals a few millimeters long. There are many stamens at the center, each with a yellow anther. The species is andromonoecious, with individuals bearing both bisexual and male-only flowers. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paronychia Chartacea
''Paronychia chartacea'' is a rare species of flowering plant in the family Caryophyllaceae known by the common names papery Whitlow-wort and paper nailwort. It is endemic to Florida in the United States. There are two subspecies of the plant; ssp. ''chartacea'' occurs in Central Florida, especially the Lake Wales Ridge, and ssp. ''minima'' is native to the Florida Panhandle.''Paronychia chartacea''. Center for Plant Conservation. The two subspecies are geographically separated and do not occur together. Both are included on the federal Endangered Species List, on which the species is designated threatened. This is often an annual herb, though ssp. ''chartacea'' may be a short-lived perennial. It produces a short, spreading stem that branches many times to take on a mat-like ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypericum Cumulicola
''Hypericum cumulicola'' is a rare species of flowering plant in the family Hypericaceae known by the common name highlands scrub hypericum, or highlands scrub St. John's wort. It is endemism, endemic to Florida, where it is threatened by habitat loss and degradation.''Hypericum cumulicola''. Center for Plant Conservation. It is a federally listed endangered species of the United States. This is a perennial herb with wiry, sometimes woody, stems growing from a taproot and reaching about 60 centimeters in maximum length. The leaves have slightly succulent blades which are linear in shape and measure just a few millimeters long. Flowers occur on the upper branches in a scattered fashion. Each has five yellow petals 3 to 4 millimeters long and many stamens at the center. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Clausa
''Pinus clausa'' is a species of pine endemic to the Southeastern United States. Its common names include sand pine, Florida spruce pine, Alabama pine, and scrub pine. Distribution The tree is found in two separate locations, one across central peninsular Florida, and the other along the western Florida panhandle coast into the Alabama coast. There is a range gap of about between the populations (from Apalachicola to Cedar Key). It is largely confined to very infertile, excessively well-drained, sandy habitats where competition from larger-growing species is minimized by the harsh growing conditions of hot sun, fast-draining white sands, and frequent severe seasonal droughts. It is often the only canopy tree in the Florida scrub ecosystem. Description ''Pinus clausa'' is a small, often shrubby tree from , exceptionally to tall. The leaves are needle-like, in pairs, long, and its cones are long. Over much of its range, it is fire-adapted to stand-replacing wildfires, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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