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Salix Hastata
''Salix hastata'' is a species of flowering plant in the willow family, known by the common name halberd willow. It has an almost circumpolar distribution,''Salix hastata''. The Nature Conservancy. occurring throughout the northern s of the Northern Hemisphere, most frequently found near the coast of the Arctic Ocean.Esser, Lora L. 1992 ''Salix hastata''. In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Linnaeus
Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as and, after his 1761 ennoblement, as . Linnaeus was born in Råshult, the countryside of Småland, in southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his ' in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic
The Arctic ( or ) is a polar regions of Earth, polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenland), Finland, Iceland, Norway, Russia (Murmansk Oblast, Murmansk, Siberia, Nenets Autonomous Okrug, Nenets Okrug, Novaya Zemlya), Sweden and the United States (Alaska). Land within the Arctic region has seasonally varying snow and sea ice, ice cover, with predominantly treeless permafrost (permanently frozen underground ice) containing tundra. Arctic seas contain seasonal sea ice in many places. The Arctic region is a unique area among Earth's ecosystems. The cultures in the region and the Arctic indigenous peoples have adapted to its cold and extreme conditions. Life in the Arctic includes zooplankton and phytoplankton, fish and marine mammals, birds, land animals, plants and human societies. Arctic land is bordered by the subarctic. De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska North Slope
The Alaska North Slope ( Iñupiaq: ''Siḷaliñiq'') is the region of the U.S. state of Alaska located on the northern slope of the Brooks Range along the coast of two marginal seas of the Arctic Ocean, the Chukchi Sea being on the western side of Point Barrow, and the Beaufort Sea on the eastern. Petroleum resources The Alaska North Slope region includes the National Petroleum Reserve–Alaska, with the bulk of Alaska's known petroleum until the Prudhoe Bay Oil Field was discovered in 1968, followed by the Kuparuk River oil field in 1969. The region also includes the Arctic National Wildlife Refuge, which itself has been the subject of controversy surrounding the possibility of petroleum drilling within its boundaries. The petroleum extracted from the region is transferred south by means of the Trans-Alaska Pipeline System to Valdez on the Pacific Ocean. Under the North Slope is an ancient seabed, which is the source of the oil. Within the North Slope, there is a geologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polytrichum
''Polytrichum'' is a genus of mosses — commonly called haircap moss or hair moss — which contains approximately 70 species that cover a cosmopolitan distribution. The genus ''Polytrichum'' has a number of closely related sporophytic characters. The scientific name is derived from the Ancient Greek words ''polys'', meaning "many", and ''thrix'', meaning "hair". This name was used in ancient times to refer to plants with fine, hairlike parts, including mosses, but this application specifically refers to the hairy calyptras found on young sporophytes. A similar naming related to hair appears in Old Norse, ''haddr silfjar'', "hair of Sif", goddess from Norse Mythology, wife of the god Thor. There are two major sections of ''Polytrichum'' species. The first — section ''Polytrichum'' — has narrow, toothed, and relatively erect leaf margins. The other — section ''Juniperifolia'' — has broad, entire, and sharply inflexed leaf margins that enclose the lamellae on the upper lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carex
''Carex'' is a vast genus of more than 2,000 species of grass-like plants in the family Cyperaceae, commonly known as sedges (or seg, in older books). Other members of the family Cyperaceae are also called sedges, however those of genus ''Carex'' may be called true sedges, and it is the most species-rich genus in the family. The study of ''Carex'' is known as caricology. Description All species of ''Carex'' are perennial, although some species, such as '' C. bebbii'' and '' C. viridula'' can fruit in their first year of growth, and may not survive longer. They typically have rhizomes, stolons or short rootstocks, but some species grow in tufts (caespitose). The culm – the flower-bearing stalk – is unbranched and usually erect. It is usually distinctly triangular in section. The leaves of ''Carex'' comprise a blade, which extends away from the stalk, and a sheath, which encloses part of the stalk. The blade is normally long and flat, but may be folded, inrolled, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alnus
Alders are trees comprising the genus ''Alnus'' in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes. Description With a few exceptions, alders are deciduous, and the leaves are alternate, simple, and serrated. The flowers are catkins with elongate male catkins on the same plant as shorter female catkins, often before leaves appear; they are mainly wind-pollinated, but also visited by bees to a small extent. These trees differ from the birches (''Betula'', another genus in the family) in that the female catkins are woody and do not disintegrate at maturity, opening to release the seeds in a similar manner to many conifer cones. The largest species are red alder (''A. rubra'') on the west coast of North America, and black alder (''A. glutinosa''), native to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Populus Trichocarpa
''Populus trichocarpa'', the black cottonwood, western balsam-poplar or California poplar, is a deciduous broadleaf tree species native to western North America. It is used for timber, and is notable as a model organism in plant biology. Description It is a large tree, growing to a height of and a trunk diameter over , which makes it the largest poplar species in the Americas. It is normally fairly short-lived, but some trees may live up to 400 years. A cottonwood in Willamette Mission State Park near Salem, Oregon, holds the national and world records. Last measured in April 2008, this black cottonwood was found to be standing at tall, around, with 527 points. The bark is grey and covered with lenticels, becoming thick and deeply fissured on old trees. The bark can become hard enough to cause sparks when cut with a chainsaw.Ewing, Susan. The Great Alaska Nature Factbook. Portland: Alaska Northwest Books, 1996. The stem is grey in the older parts and light brown in youn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salix Lanata
''Salix lanata'', the woolly willow, is a subarctic species of willow native to Iceland, the Faeroe Islands and Finland, through to eastern Siberia. In Scotland it can be found in only a few localities of Perthshire, Angus and Aberdeenshire, generally on rocky mountain sides at altitudes of .Willows and Poplars of Great Britain and Ireland, BSBI Handbook No. 4; Meikle; 1984. Description ''Salix lanata'' is a low, many-branched, deciduous shrub, generally less than high by broad. The new twigs are hairy at first, soon becoming hairless and brown. The grey-green leaves are rather variable, but generally ovate up to long by up to wide, covered in silvery-grey "wool" to begin with but less so with age. The leaf margins are usually entire. The catkins appear in summer (May to July), with male and female catkins on separate plants (like all willows this species is dioecious). The female catkins are densely hairy. The petioles are usually less than 1 cm long, and the stipules ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salix Pulchra
''Salix pulchra'' is a species of flowering plant in the willow family, known by the common names diamondleaf willow, tealeaf willow, and thin red willow.Uchytil, Ronald J. 1991''Salix pulchra''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. It is native to northern North America, where it occurs in Alaska, Yukon, the Northwest Territories, and Nunavut. The species is also found in northern British Columbia, and occurs in Russia.''Salix pulchra''. ''''. This |
Salix Alaxensis
''Salix alaxensis'' is a species of flowering plant in the willow family known by the common names Alaska willow and feltleaf willow. It is native to northern North America, where it occurs throughout Alaska and northwestern Canada.Uchytil, Ronald J. 1991''Salix alaxensis''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Description This plant is a shrub or tree up to tall. The stem diameter is up to . In harsher climates, it remains much smaller. The smooth, gray bark becomes furrowed and scaly with age. The leaves are up to 11 cm long and have woolly undersides. and eating up to 90% of the twigs on the plant. In some areas of northern Alaska, this plant provides 95% of the winter food for moose. Snowshoe hares also prefer it. In northern Alaska, this may be the only source of fuel wood. It is one of the tallest willows in the Canadian Arctic Archipelago. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salix Barclayi
''Salix barclayi,'' or Barclay's willow, is a species of willow native to North America, found primarily in the Northwestern area of the United States and Canada. It grows near lakes and streams at elevation. It is a shrub, that can grow up to 2.5 m. (8 ft.) tall and tends to be slender. Leaves are elliptic to obovate, 2–6 cm long and 1–2.5 cm wide. Leaves are hairy when young, with midrib hairs lasting into maturity. Catkins are on short, leafy peduncles. Staminate catkins are 3 cm long with 2 stamens, while pistillate catkins are 2.5–5 cm long and glabrous. Care This plant prefers partial sun and well-drained, moist soil to survive efficiently. This plant should grow very quickly, but tends to spread very slowly. References barclayi {{Salicaceae-stub ... [...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] |
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