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Nativar
A nativar is a horticulturally bred strain of a plant species, and distinguishes them from their natively bred counterparts. ''Nativar'' is a portmanteau of the words 'native' and 'cultivar'; such plants may have different genetic traits from those formerly prevalent in the wild. The difference between a 'nativar' and a 'cultivar' is if the species is grown within its native historic range. Often the goal of using nativars within their historic species range is to reintroduce their ecological benefit into the local ecology. The ecological consequences and benefits of nativars is a widely discussed concept within gardening and horticultural communities, as the capacity of nativar plants to fit the ecological niche of their native counterpart may be manipulated during the breeding process. Nativars are developed for a variety of reasons, including disease resistance, pest resistance, drought tolerance. Within the horticulture industry, nativars are often developed mostly for aesthet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castanea Dentata
The American chestnut (''Castanea dentata'') is a large, fast-growing deciduous tree of the beech family native to eastern North America. As is true of all species in genus Castanea, the American chestnut produces burred fruit with edible nuts. The American chestnut was one of the most important forest trees throughout its range and was considered the finest chestnut tree in the world.Davis, Donald E"Historical Significance of American Chestnut on Appalachian Culture and Ecology" ''www.ecosystem.psu.edu'', 2005. Retrieved October 28, 2015. During the early to mid 20th century, American chestnut trees were devastated by chestnut blight, a fungal disease that came from Chinese chestnut trees that were introduced into North America from East Asia. It is estimated that the blight killed between 3 and 4 billion American chestnut trees in the first half of the 20th century, beginning in 1904.Griffin, Gary"Recent advances in research and management of chestnut blight on American chest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarkia Pulchella
''Clarkia pulchella'' also known as pinkfairies, ragged robin, and deerhorn clarkia is a species of flowering plant in the family Onagraceae. Description An herbaceous perennial plant, it is the type species of ''Clarkia''. This plant is , erect, branched or not, and covered with short hairs. The leaves alternate along the stalk and are lance to spoon-shaped, about long and sometimes finely toothed. The distinctive lavender to light purple flowers are four-lobed and fused at the base. Each lobe is in turn three-lobed with the middle lobe widest. Distribution and habitat ''Clarkia pulchella'' is found in the Pacific Northwest mainly east of the Cascade Range in Washington, Oregon, Idaho, the southern margin of British Columbia and the extreme west of Montana. Occurring over a wide range of elevations, it is most common from . Its habitat is often forest, rocky, grassland or disturbed. Discovery It was described by Meriwether Lewis close to Kamiah, Idaho during the Lewis and Cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Agriculture
Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago. After gathering wild grains beginning at least 105,000 years ago, nascent farmers began to plant them around 11,500 years ago. Sheep, goats, pigs and cattle were domesticated over 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. Industrial agriculture based on large-scale monoculture in the twentieth century came to dominate agricultural output, though about 2 billion people still depended on subsistence agriculture. The major agricultural products can be broadly grouped into foods, fibers, fuels, and raw materials (such as rubber). Food classes include cereals (grains), vegetables, fruits, cooking oils, meat, milk, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wikipedia Student Program
Wikipedia is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system. Wikipedia is the largest and most-read reference work in history. It is consistently one of the 10 most popular websites ranked by Similarweb and formerly Alexa; Wikipedia was ranked the 5th most popular site in the world. It is hosted by the Wikimedia Foundation, an American non-profit organization funded mainly through donations. Wikipedia was launched by Jimmy Wales and Larry Sanger on January 15, 2001. Sanger coined its name as a blend of ''wiki'' and ''encyclopedia''. Wales was influenced by the "spontaneous order" ideas associated with Friedrich Hayek and the Austrian School of economics after being exposed to these ideas by the libertarian economist Mark Thornton. Initially available only in English, versions in other languages were quickly developed. Its combined edition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naturalisation (biology)
Naturalisation (or naturalization) is the ecological phenomenon through which a species, taxon, or population of exotic (as opposed to native) origin integrates into a given ecosystem, becoming capable of reproducing and growing in it, and proceeds to disseminate spontaneously. In some instances, the presence of a species in a given ecosystem is so ancient that it cannot be presupposed whether it is native or introduced. Generally, any introduced species may (in the wild) either go extinct or naturalise in its new environment. Some populations do not sustain themselves reproductively, but exist because of continued influx from elsewhere. Such a non-sustaining population, or the individuals within it, are said to be adventive. Cultivated plants are a major source of adventive populations. The above refers to ''naturalize'' as an intransitive verb, as in, "The species naturalized". In North America it is common to use ''naturalize'' as a transitive verb, as in, "City staff na ... [...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 n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lotus Corniculatus
''Lotus corniculatus'' is a flowering plant in the pea family Fabaceae, native to grasslands in temperate Eurasia and North Africa. Common names include common bird's-foot trefoil, eggs and bacon, birdsfoot deervetch, and just bird's-foot trefoil, though the latter name is often also applied to other members of the genus. It is a perennial herbaceous plant, similar in appearance to some clovers. The name 'bird's foot' refers to the appearance of the seed pods on their stalk. Five leaflets are present, but with the central three held conspicuously above the others, hence the use of the name 'trefoil'. It is often used as forage and is widely used as food for livestock due to its nonbloating properties. Description The height of the plant is variable, from , occasionally more where supported by other plants; the stems can reach up to long. It is typically sprawling at the height of the surrounding grassland. It can survive fairly close grazing, trampling, and mowing. It is most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plantago Lanceolata
''Plantago lanceolata'' is a species of flowering plant in the plantain family Plantaginaceae. It is known by the common names ribwort plantain, narrowleaf plantain, English plantain, ribleaf, lamb's tongue, and buckhorn. It is a common weed on cultivated or disturbed land. Description The plant is a rosette-forming perennial herb, with leafless, silky, hairy flower stems (). The basal leaves are lanceolate spreading or erect, scarcely toothed with 3-5 strong parallel veins narrowed to a short petiole. The flower stalk is deeply furrowed, ending in an ovoid inflorescence of many small flowers each with a pointed bract. Each inflorescence can produce up to two hundred seeds. Flowers are (calyx green, corolla brownish), 4 bent back lobes with brown midribs and long white stamens. It is native to temperate Eurasia, widespread throughout the British Isles, but scarce on the most acidic soils ( pH < 4.5). It is present and widespread in the Americas and Australia as an [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physocarpus Opulifolius
''Physocarpus opulifolius'', known as common ninebark, Eastern ninebark, Atlantic ninebark, or simply ninebark, is a species of flowering plant in the rose family Rosaceae, native to eastern North America. Description It is a mound-shaped deciduous shrub with alternate, simple leaves, on arching stems. It has a height from and a spread of . The leaves vary from in length, with palmately veined lobes. It is fast-growing, insect- and disease-resistant, and drought-tolerant. The species is adaptable to a very wide range of soil and site conditions, from moist to dry, acid to alkaline, and gravelly to heavy clay; and can grow in partial shade to full sun. The 5-petaled, diameter flowers form in corymbs. The flowers are white to pinkish, blooming from May to June in North America. In Missouri the fruits ripen from August to early October and are small, dry pods hanging in drooping, papery clusters. The bark peels off in thin papery strips, resembling the number nine in shape, ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarkia Amoena 2022-06-19 1942
''Clarkia'' is a genus within the flowering plant family Onagraceae. Over 40 species are currently classified in ''Clarkia''; almost all are native to western North America, though one species (''Clarkia tenella'') is native to South America. Clarkias are typically annual herbs, growing either prostrate or erect to a height of less than 2 metres. Their leaves are small and simple, from 1 to 10 cm in length depending on the species. Their flowers have four sepals and four petals, usually white, pink, or red, and are often spotted or streaked. Their fruit are elongated, cylindrical pods, usually 4-grooved or 8-grooved, and when mature they hold many tiny, cubical seeds. Several members of the genus are sometimes referred to by the common name "godetia", including ''Clarkia amoena'', ''Clarkia affinis'', and ''Clarkia lassenensis'' (the Lassen godetia). This is because they were formerly classified in a genus called ''Godetia'', which is no longer recognised since its me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asclepias Tuberosa
''Asclepias tuberosa'', commonly known as butterfly weed, is a species of milkweed native to eastern and southwestern North America. It is commonly known as butterfly weed because of the butterflies that are attracted to the plant by its color and its copious production of nectar.(1) (2) Description It is a perennial plant growing to tall. The leaves are spirally arranged, lanceolate, long, and broad. From April to September, in the upper axils, –wide umbels of orange, yellow or red flowers wide appear. They each have five petals and five sepals. It is uncertain if reddish flowers are due to soil mineral content, ecotype genetic differentiation, or both. A cultivar named 'Hello Yellow' typically has more yellowish flowers than ordinary examples of this plant. The fruit pod is long, containing many long-haired seeds. Similar species The plant looks similar to the lanceolate milkweed (''Asclepias lanceolata''), but is uniquely identified by the larger number of flow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camassia Leichtlinii
''Camassia leichtlinii'', the great camas or large camas, is a species of flowering plant in the family Asparagaceae. This herbaceous perennial is native to western North America in British Columbia, Canada and California, Nevada, Oregon and Washington, USA. Description Great camas is a perennial herbaceous plant that grows from a bulb In botany, a bulb is structurally a short stem with fleshy leaves or leaf basesBell, A.D. 1997. ''Plant form: an illustrated guide to flowering plant morphology''. Oxford University Press, Oxford, U.K. that function as food storage organs duri .... It can grow tall. Leaves are long and narrow, stemming from the basal rosette. The inflorescence is a spike-like cluster on a leafless stem that is held above the leaves. It can be mistaken for the more common '' Camassia quamash'', which has an overlapping range. Ecology It needs consistent moisture in the spring, but will not be harmed by seasonal drought after the seed pods mature and the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
