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Ulmus 'Morton Plainsman' = Vanguard
''Ulmus'' 'Morton Plainsman' (selling name ) is a hybrid cultivar raised by the Morton Arboretum from a crossing of Siberian Elm (female parent) and a Japanese Elm grown from openly pollinated seed donated by the Agriculture Canada Research Station at Morden, Manitoba. Tested in the US National Elm Trial coordinated by Colorado State Universityaveraged a survival rate of 78% after 10 years. Description has modest upright growth, increasing in height by an average of 0.8 m in an assessment at U C Davis,McPherson, G. ''et al''. (2008). National elm trial: Initial report from Northern California. ''Western Arborist'', Fall 2009, 32–36. with leaves much the same size and colour of the American ElmHowever, its performance in the southern United States has not impressed, and it was dismissed, along with its Morton stablemates and , as "ugly" by Michael Dirr, Professor of Horticulture at the University of Georgiabr> on account of its "wild" growth and splaying branches. P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Pumila
''Ulmus pumila'', the Siberian elm, is a tree native to Asia. It is also known as the Asiatic elm and dwarf elm, but sometimes miscalled the 'Chinese Elm' ('' Ulmus parvifolia''). ''U. pumila'' has been widely cultivated throughout Asia, North America, Argentina, and southern Europe, becoming naturalized in many places, notably across much of the United States. Description The Siberian elm is usually a small to medium-sized, often bushy, deciduous tree growing to tall, the diameter at breast height to . The bark is dark gray, irregularly longitudinally fissured. The branchlets are yellowish gray, glabrous or pubescent, unwinged and without a corky layer, with scattered lenticels. The winter buds dark brown to red-brown, globose to ovoid. The petiole is , pubescent, the leaf blade elliptic-ovate to elliptic-lanceolate, , the colour changing from dark green to yellow in autumn.Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) ''Flora of Chin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Beetle
The Japanese beetle (''Popillia japonica'') is a species of scarab beetle. The adult measures in length and in width, has iridescent copper-colored elytra and a green thorax and head. It is not very destructive in Japan (where it is controlled by natural predators), but in North America and some regions of Europe is a noted pest to roughly 300 species of plants, including rose bushes, grapes, hops, canna, crape myrtles, birch trees, linden trees, and others. The adult beetles damage plants by skeletonizing the foliage (i.e., consuming only the material between a leaf's veins) as well as, at times, feeding on a plant's fruit. The subterranean larvae feed on the roots of grasses. Description Adult ''P. japonica'' measure in length and in width, with iridescent copper-colored elytra and green thorax and head. A row of white tufts (spots) of hair project from under the wing covers on each side of the body. Distribution ''Popillia japonica'' is native to Japan, but i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brenton Arboretum
The Brenton Arboretum is a 141-acre arboretum and public garden in Dallas Center, Iowa, United States, established in 1997. The arboretum displays 175 native Iowa trees and shrubs suitable to the site, as well as many other tree species which can grow in central Iowa. The non-profit arboretum is open to the public from 9 am to sunset on Tuesday through Sunday, featuring a collection of over 2,600 trees and shrubs on display. The arboretum was founded by Sue and J.C. (Buz) Brenton and their children, on land which was part of the original Home Farm acquired by Dr. James Brenton and his son, William Henry, soon after they arrived from Indiana in 1853 by covered wagon. Its first trees were planted in 1997. The master plan was created by Anthony Tyznik of Batavia, Illinois, who for many years was the landscape architect for the Morton Arboretum in Chicago, Illinois. The arboretum has a lake, pond, wetlands, several streams, walking paths, bridges, prairies, wildflowers and a smal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus 'Morton Glossy' = Triumph
''Ulmus'' 'Morton Glossy' (selling name ) is a hybrid cultivar raised by the Morton Arboretum, Illinois. Originally named 'Charisma' until it was realized that name had already been registered for another plant, the tree was derived from a crossing of two other hybrid cultivars grown at the Morton: and . Tested in the US National Elm Trial coordinated by Colorado State University averaged a survival rate of 86% after 10 years. was introduced to the UK in 2006 by the Frank P. Matthews nursery in Worcestershire.Brookes, A. H. (2020). ''Great Fontley Elm Trial, 2020 Report.'' Butterfly Conservation, Lulworth, UK. Description has been promoted in the United States as "strong and symmetrical" in growth and habi. However, its performance in the southern United States has not impressed, and it was dismissed as "ugly" by Michael Dirr, Professor of Horticulture at the University of Georgiabr> on account of its "wild" growth and splaying branches. It is similar in stature to the Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus 'Morton' = Accolade
''Ulmus'' 'Morton' (selling name ) is an elm cultivar cloned from a putative intraspecific hybrid planted at the Morton Arboretum in 1924, which itself originated as seed collected from a tree at the Arnold Arboretum in Massachusetts. Although this tree was originally identified as '' Ulmus crassifolia'', it is now believed to have been a hybrid of the Japanese elm ( ''Ulmus davidiana'' var. ''japonica'') and Wilson's elm (formerly ''Ulmus wilsoniana'', but also sunk as ''U. davidiana'' var. ''japonica''). has proven to be the most successful cultivar tested in the US National Elm Trial, averaging a survival rate of 92.5% overall. Description The parent tree at the Morton Arboretum is noted for the resemblance of its habit to the American elm ''Ulmus americana'', its upright-arching branches creating the familiar vase-shape, although the tree does not grow as large as the iconic native elm, reaching scarcely 20 m at maturity. Its glossy, deep green leaves are also marked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australasia
Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologically, where the term covers several slightly different, but related regions. Derivation and definitions Charles de Brosses coined the term (as French ''Australasie'') in ''Histoire des navigations aux terres australes'' (1756). He derived it from the Latin for "south of Asia" and differentiated the area from Polynesia (to the east) and the southeast Pacific ( Magellanica). In the late 19th century, the term Australasia was used in reference to the "Australasian colonies". In this sense it related specifically to the British colonies south of Asia: New South Wales, Queensland, South Australia, Tasmania, Western Australia, Victoria (i.e., the Australian colonies) and New Zealand. Australasia found continued geopolitical attention in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Elm Trial
The National Elm Trial was an American volunteer effort to evaluate a range of newly developed elm cultivars as replacements for elms destroyed by Dutch elm disease. The Colorado State University College of Agricultural Sciences coordinated the trial.(1) .(2) The trial began in 2005, but was restricted to elm cultivars commercially available in the United States, unlike the trial conducted by Iowa State University in the 1970s which included the most recent European developments. The trial was conducted for 10 years, with annual assessments of each tree for height, diameter, crown characteristics, and fall color, as well as response to vascular diseases, canker diseases, foliar diseases, insect infestations, bark beetle infestations, and abiotic damages. Stated goals of the trial were as follows: * Determine the growth and horticultural performance of commercially available elm cultivars resistant to Dutch elm disease in various climate regimes in the United States. * Determine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celsius
The degree Celsius is the unit of temperature on the Celsius scale (originally known as the centigrade scale outside Sweden), one of two temperature scales used in the International System of Units (SI), the other being the Kelvin scale. The degree Celsius (symbol: °C) can refer to a specific temperature on the Celsius scale or a unit to indicate a difference or range between two temperatures. It is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale in 1742. Before being renamed in 1948 to honour Anders Celsius, the unit was called ''centigrade'', from the Latin ''centum'', which means 100, and ''gradus'', which means steps. Most major countries use this scale; the other major scale, Fahrenheit, is still used in the United States, some island territories, and Liberia. The Kelvin scale is of use in the sciences, with representing absolute zero. Since 1743 the Celsius scale has been based on 0 °C for the freezing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LT50
LT50 is the median Lethal Time (time until death) after exposure of an organism to a toxic substance or stressful condition. LT50 is commonly used in toxicology studies to quantify amount of a stressor necessary to kill an organism. LT50 can be used in conjunction with EC50 (median Exposure Concentration) for even more precise quantification. See also * Acute toxicity * Viability assay A viability assay is an assay that is created to determine the ability of organs, cells or tissues to maintain or recover a state of survival. Viability can be distinguished from the all-or-nothing states of life and death by the use of a quan ... References Toxicology {{biology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sakura
A cherry blossom, also known as Japanese cherry or sakura, is a flower of many trees of genus ''Prunus'' or ''Prunus'' subg. ''Cerasus''. They are common species in East Asia, including China, Korea and especially in Japan. They generally refer to ornamental cherry trees, not to be confused with cherry trees that produce fruit for eating.Toshio Katsuki. (2015) ''Sakura''. pp.14–18 Iwanami Shoten. It is considered the national flower of Japan. Wild species of the cherry tree is widely distributed mainly in the Northern hemisphere. In the mainstream classification in Europe and North America, cherry trees for ornamental purposes are classified into the genus ''Prunus'' which consists of about 400 species. In the mainstream classification in Japan, China, and Russia, on the other hand, ornamental cherry trees are classified into the genus ''Cerasus'', which consists of about 100 species separated from the genus ''Prunus'', and the genus ''Cerasus'' does not include ''Prun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Plains
The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, and grassland. It is the southern and main part of the Interior Plains, which also include the tallgrass prairie between the Great Lakes and Appalachian Plateau, and the Taiga Plains and Boreal Plains ecozones in Northern Canada. The term Western Plains is used to describe the ecoregion of the Great Plains, or alternatively the western portion of the Great Plains. The Great Plains lies across both Central United States and Western Canada, encompassing: * The entirety of the U.S. states of Kansas, Nebraska, North Dakota and South Dakota; * Parts of the U.S. states of Colorado, Iowa, Minnesota, Missouri, Montana, New Mexico, Oklahoma, Texas and Wyoming; * The southern portions of the Canadian provinces of Alberta, Saska ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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