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Polemonium Pectinatum
''Polemonium pectinatum'' is a species of flowering plant in the phlox family known by the common names Washington Jacob's-ladder and Washington polemonium. It is endemic to the state of Washington in the United States, where it occurs in the Columbia Basin, including the Channeled Scablands and the Palouse.''Polemonium pectinatum''. The Nature Conservancy. Description This perennial herb grows from a , producing a cluster of stems up to 80 centimeters tall. The alternately arranged leaves are each made up of several linear-shaped leaflets up to 5 centimeters long. The hairy, glandular |
Edward Lee Greene
Edward Lee Greene (August 20, 1843–November 10, 1915) was an American botanist known for his numerous publications including the two-part ''Landmarks of Botanical History'' and the describing of over 4,400 species of plants in the American West. Early life Edward Lee Greene was born on August 20, 1843 in Hopkinton, Rhode Island. In 1859 Greene moved to Wisconsin and began studying at Albion Academy, a very reputable institution with a religious emphasis. There Greene met Thure Kumlien, a Swedish Naturalist with an interest in botany. Greene accompanied Kumlein on field trips, further developing Greene's interest in botany. In August 1862, Greene joined his father and brothers in joining the 13th Wisconsin Volunteer Infantry Regiment of the Union Army. Though he never rose above the rank of private in his three years of service, Greene was able to advance his botanical studies, collecting specimens as he marched through Tennessee, Kentucky and Alabama. Following his release ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elymus Cinereus
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Elymus may refer to: * ''Elymus'' (plant), a genus of grasses * Elymus (mythology), the mythical ancestor of the Elymians * A man killed by Gorge (mythology) In Greek mythology, Gorge( grc, Γόργη, comes from the adjective ''gorgos,'' "terrible" or "horrible") may refer to: *Gorge, a Libyan princess as one of the Danaïdes, daughters of King Danaus. Her mother was either the hamadryads Atlanteia or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polemonium
''Polemonium'', commonly called Jacob's ladders or Jacob's-ladders (the name derived from the Biblical story), is a genus of between 25 and 40 species of flowering plants in the family Polemoniaceae, native to cool temperate to arctic regions of the Northern Hemisphere. One species also occurs in the southern Andes in South America. Many of the species grow at high altitudes, in mountainous areas. Most of the uncertainty in the number of species relates to those in Eurasia, many of which have been synonymized with '' Polemonium caeruleum''. ''Polemonium'' are perennial plants (rarely annual plants) growing 10–120 cm tall with bright green leaves divided into lance-shaped leaflets. They produce blue (rarely white or pink) flowers in the spring and summer. Some species are used as food plants by the larvae of some Lepidoptera species including '' Coleophora polemoniella''. Species Kew's Plants of the World Online accepts 37 species. Many are locally known sim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introduced Species
An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are considered naturalized. The process of human-caused introduction is distinguished from biological colonization, in which species spread to new areas through "natural" (non-human) means such as storms and rafting. The Latin expression neobiota captures the characteristic that these species are ''new'' biota to their environment in terms of established biological network (e.g. food web) relationships. Neobiota can further be divided into neozoa (also: neozoons, sing. neozoon, i.e. animals) and neophyt ... [...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] |
Hydrology
Hydrology () is the scientific study of the movement, distribution, and management of water on Earth and other planets, including the water cycle, water resources, and environmental watershed sustainability. A practitioner of hydrology is called a hydrologist. Hydrologists are scientists studying earth or environmental science, civil or environmental engineering, and physical geography. Using various analytical methods and scientific techniques, they collect and analyze data to help solve water related problems such as environmental preservation, natural disasters, and water management. Hydrology subdivides into surface water hydrology, groundwater hydrology (hydrogeology), and marine hydrology. Domains of hydrology include hydrometeorology, surface hydrology, hydrogeology, drainage-basin management, and water quality, where water plays the central role. Oceanography and meteorology are not included because water is only one of many important aspects within those fields. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. Furthermore, grasslands are one of the largest biomes on earth and dominate the landscape worldwide. There are different types of grasslands: natural grasslands, semi-natural grasslands, and agricultural grasslands. They cover 31–69% of the Earth's land area. Definitions Included among the variety of definitions for grasslands are: * "...any plant community, including harvested forages, in which grasses and/or legumes make up the dominant vegetation." * "...terrestrial ecosystems dominated by herbaceous and shrub vegetation, and maintained by fire, grazing, drought and/or freezing temperatures." (Pilot Assessment of Global Ecosystems, 2000) * "A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overgrazing
Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature reserves. It can also be caused by immobile, travel restricted populations of native or non-native wild animals. Overgrazing reduces the usefulness, productivity, and biodiversity of the land and is one cause of desertification and erosion. Overgrazing is also seen as a cause of the spread of invasive species of non-native plants and of weeds. Degrading land, emissions from animal agriculture and reducing the biomass in a ecosystem contribute directly to climate change. Overgrazing can be reversed or prevented by removing grazers in order to give plants time to recover between grazing events. Successful planned grazing strategies have been support in the American bison of the Great Plains, or migratory Wildebeests of the African savann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acre
The acre is a unit of land area used in the imperial Imperial is that which relates to an empire, emperor, or imperialism. Imperial or The Imperial may also refer to: Places United States * Imperial, California * Imperial, Missouri * Imperial, Nebraska * Imperial, Pennsylvania * Imperial, Texa ... and United States customary units#Units of area, US customary systems. It is traditionally defined as the area of one Chain (unit), chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. Based upon the International yard and pound, international yard and pound agreement of 1959, an acre may be declared as exactly 4,046.8564224 square metres. The acre is sometimes abbreviated ac but is usually spelled out as the word "acre".National Institute of Standards and Technolog(n.d.) General Tables of Units of Measurement . Traditionally, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribes Aureum
''Ribes aureum'', known by the common names golden currant, clove currant, pruterberry and buffalo currant, is a species of flowering plant in the genus ''Ribes'' native to North America. Description The plant is a small to medium-sized deciduous shrub, tall. The leaves are green, semi-leathery, with 3 or 5 lobes, and turn red in autumn. The plant blooms in spring with racemes of conspicuous golden yellow flowers, often with a pronounced, spicy fragrance similar to that of cloves or vanilla. Flowers may also be shades of cream to reddish, and are borne in clusters of up to 15. The shrub produces berries about in diameter from an early age. The ripe fruits are amber yellow to black. Those of variety ''villosum'' are black. Taxonomy The species belongs to the subgenus ''Ribes'', which contains other currants such as the blackcurrant (''R. nigrum'') and redcurrant (''R. rubrum''), and is the sole member of the section ''Symphocalyx''. Varieties * ''Ribes aureum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosa Woodsii
''Rosa woodsii'' is a species of wild rose known by the common names Woods' rose, interior rose, common wild rose, mountain rose, pear-hip rose, and prairie rose. Distribution and habitat It is native to North America including much of Canada and Alaska and the western and central United States. It grows in a variety of habitats such as open woods, plains, stream banks, stony slopes and disturbed areas. In the Sierra Nevadas, it grows to in moist, rocky soils in mixed coniferous forest, upper montane forest, and subalpine forest. Description File:Rosa woodsii 4218.JPG, Prickle (closeup) File:Rosa woodsii rose hips.jpg, Rose hips of Rosa woodsii File:Wild rose Rosa woodsii closeup.jpg, Lighter pink flower, at in the Eastern Sierra File:Mountain roses on Raspberry Island-vertical.JPG, ''Rosa woodsii'' on Raspberry Island (Alaska) Growth pattern ''Rosa woodsii'' is a perennial bushy shrub which grows up to three meters tall. The shrubs can form large, dense thickets. The plan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amelanchier Alnifolia
''Amelanchier alnifolia'', the Saskatoon berry, Pacific serviceberry, western serviceberry, western shadbush, or western juneberry, is a shrub with an edible berry-like fruit, native to North America. Description It is a deciduous shrub or small tree that most often grows to , rarely to , in height. Its growth form spans from suckering and forming colonies to clumped. The leaves are oval to nearly circular, long and broad, on a leaf stem, margins toothed mostly above the middle. As with all species in the genus ''Amelanchier'', the flowers are white, with five quite separate petals and five sepals. In ''A. alnifolia'', they are about across, with 20 stamens and five styles, appearing on short racemes of 3–20, somewhat crowded together, blooming from April to July. The fruit is a small purple pome in diameter, ripening in early summer in the coastal areas and late summer further inland. Resembling blueberries, it has a waxy bloom. Serviceberries are relatively di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
