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A bur (also spelled burr) is a seed or dry fruit or infructescence that has hooks or teeth. The main function of the bur is to spread the seeds of the bur plant, often through epizoochory. The hooks of the bur are used to catch on to for example fur or fabric, so that the bur, which contain seeds, then can be transported along with the thing it attached itself to. Another use for the spines and hooks are physical protection against herbivores. Their ability to stick to animals and fabrics has shaped their reputation as bothersome. Some other forms of Diaspore (botany), diaspores, such as the stems of certain species of Cactaceae, cactus also are covered with thorns and may function as burs. Bur-bearing plants such as ''Xanthium'' species are often single-stemmed when growing in dense groups, but branch and spread when growing singly. The number of burs per fruit along with the size and shape can vary largely between different bur plants. Function Containing seeds, burs sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bur Macro BlackBg
A bur (also spelled burr) is a seed or dry fruit or infructescence that has hooks or teeth. The main function of the bur is to spread the seeds of the bur plant, often through epizoochory. The hooks of the bur are used to catch on to for example fur or fabric, so that the bur, which contain seeds, then can be transported along with the thing it attached itself to. Another use for the spines and hooks are physical protection against herbivores. Their ability to stick to animals and fabrics has shaped their reputation as bothersome. Some other forms of diaspores, such as the stems of certain species of cactus also are covered with thorns and may function as burs. Bur-bearing plants such as ''Xanthium'' species are often single-stemmed when growing in dense groups, but branch and spread when growing singly. The number of burs per fruit along with the size and shape can vary largely between different bur plants. Function Containing seeds, burs spread through catching on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpagophytum
''Harpagophytum'' ( ), also called grapple plant, wood spider, and most commonly devil's claw, is a genus of plants in the sesame family, native to southern Africa. Plants of the genus owe their common name "devil's claw" to the peculiar appearance of their hooked fruit. Several species of North American plants in the genus ''Proboscidea'' and certain species of '' Pisonia'', however, are also known by this name. Devil's claw's tuberous roots are used in folk medicine to reduce pain. Range ''Harpagophytum procumbens'' is mainly found in the eastern and south eastern parts of Namibia, Southern Botswana, and the Kalahari region of the Northern Cape, South Africa. ''H. zeyheri'' is found in the northern parts of Namibia ( Ovamboland) and southern Angola. Etymology The generic name, ''Harpagophytum'', is derived from the Greek words ''harpago'' meaning "hook" and ''phyton'' meaning "plant".Ib Friis and Olof Ryding (Editors) Folk medicine and research The ethnobotanica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctium Lappa
''Arctium lappa'', commonly called greater burdock, , edible burdock, lappa, beggar's buttons, thorny burr, or happy major is a Eurasian species of plants in the family Asteraceae, cultivated in gardens for its root used as a vegetable. It has become an invasive weed of high-nitrogen soils in North America, Australia, and other regions. Description Greater burdock is a biennial plant, rather tall, reaching as much as . It has large, alternating, wavy-edged cordiform leaves that have a long petiole and are pubescent on the underside. The flowers are purple and grouped in globular capitula, united in clusters. They appear in mid-summer, from July to September. The capitula are surrounded by an involucre made out of many bracts, each curving to form a hook, allowing the mature fruits to be carried long distances on the fur of animals. The fruits are achenes; they are long, compressed, with short pappus hairs. These are a potential hazard for humans, horses, and dogs. The minu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthriscus Caucalis
''Anthriscus caucalis'', also burr chervil or bur-chervil, a plant in the family Apiaceae. It is similar in appearance to chervil, the common cooking herb from the same genus. It sends up thin, hollow stems and bears umbel In botany, an umbel is an inflorescence that consists of a number of short flower stalks (called pedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage in the 1590s, from Latin ''umbella'' "p ...s of white flowers. The light green leaves are triangular and made up of many leaflets. The tiny hard fruits, each about 3 millimeters long, are covered in hooked spines. The plant is native to and common in parts of Europe, Asia, and North America, and has been introduced elsewhere. External linksBurke Herbarium photo and info page [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrimonia Pubescens
''Agrimonia pubescens'', the soft agrimony or downy agrimony, is a flowering plant in the genus ''Agrimonia'', a member of the rose family. It grows in dry areas and woodlands. Taxonomy The species was first described by John Torrey and Asa Gray as ''Agrimonia eupatoria'' var. ''mollis''. It was raised to a species by Nathaniel Lord Britton after the description by Karl Friedrich Wilhelm Wallroth. Description ''Agrimonia pubescens'' is an erect perennial, growing upwards of tall. It has erect and canescent or pubescent stems. The five to thirteen leaflets are oblong and dentate, and pinnately divided once. The leaves are lanceolate, with the terminal leaflet being the largest, measuring long and wide. The leaflets increase in size as they approach the top of the compound leaf. At the base of each petiole is oval-shaped stipule with a serrated margin, measuring approximately long and wide. The yellow flowers are borne on spike-like racemes. Each flower is wide with five yel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthospermum Australe
''Acanthospermum australe'' (Paraguayan starburr, ihi kukae hipa, Paraguay bur, Paraquay starbur, pipili, sheepbur, or spiny-bur) is a South American species of herbaceous plants first described as a species in 1758. Distribution The species is native to: * South America, within Brazil, French Guiana, Guyana, Suriname, Venezuela, Argentina, Paraguay, Uruguay, Bolivia, and Colombia * Caribbean, within Grenada; Martinique; St. Vincent, and Grenadines It has been introduced in China, and is an invasive species in parts of the United States, Canada, and South Africa. It is currently a widespread pioneer in the tropics and sub-tropics. Extracts Extracts of ''Acanthospermum australe'' have ''in vitro'' antiviral activity against herpesvirus and poliovirus A poliovirus, the causative agent of polio (also known as poliomyelitis), is a serotype of the species ''Enterovirus C'', in the family of ''Picornaviridae''. There are three poliovirus serotypes: types 1, 2, and 3. Poliovirus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time (magazine)
''Time'' (stylized in all caps) is an American news magazine based in New York City. For nearly a century, it was published Weekly newspaper, weekly, but starting in March 2020 it transitioned to every other week. It was first published in New York City on March 3, 1923, and for many years it was run by its influential co-founder, Henry Luce. A European edition (''Time Europe'', formerly known as ''Time Atlantic'') is published in London and also covers the Middle East, Africa, and, since 2003, Latin America. An Asian edition (''Time Asia'') is based in Hong Kong. The South Pacific edition, which covers Australia, New Zealand, and the Pacific Islands, is based in Sydney. Since 2018, ''Time'' has been published by Time USA, LLC, owned by Marc Benioff, who acquired it from Meredith Corporation. History ''Time'' has been based in New York City since its first issue published on March 3, 1923, by Briton Hadden and Henry Luce. It was the first weekly news magazine in the United St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velcro
Velcro, officially known as Velcro IP Holdings LLC and trading as Velcro Companies, is a British privately held company, founded by Swiss electrical engineer George de Mestral in the 1950s. It is the original manufacturer of hook-and-loop fasteners, which de Mestral invented. History Swiss electrical engineer George de Mestral invented his first touch fastener when, in 1941, he went for a walk in the Alps, and wondered why burdock seeds clung to his woolen socks and coat, and also his dog Milka. He discovered it could be turned into something useful. He patented it in 1955, and subsequently refined and developed its practical manufacture until its commercial introduction in the late 1950s. The fastener consisted of two components: a lineal fabric strip with tiny hooks that could 'mate' with another fabric strip with smaller loops, attaching temporarily, until pulled apart. Initially made of cotton, which proved impractical, the fastener was eventually constructed with nylon a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook And Loop Fastener
Hook-and-loop fasteners, hook-and-pile fasteners or touch fasteners (often referred to by the genericized trademark velcro, due to the prominence of the Velcro Brand) consist of two components: typically, two lineal fabric strips (or, alternatively, round "dots" or squares) which are attached (sewn or otherwise adhered) to the opposing surfaces to be fastened. The first component features tiny hooks; the second features smaller loops. When the two are pressed together the hooks catch in the loops and the two pieces fasten or bind temporarily. When separated, by pulling or peeling the two surfaces apart, the strips make a distinctive ripping sound. History The original hook-and-loop fastener was conceived in 1941 by Swiss engineer George de Mestral. The idea came to him one day after returning from a hunting trip with his dog in the Alps. He took a close look at the burs of burdock that kept sticking to his clothes and his dog's fur. He examined them under a microscope, and no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burdock
''Arctium'' is a genus of biennial plants commonly known as burdock, family Asteraceae. Native to Europe and Asia, several species have been widely introduced worldwide. Burdock's clinging properties, in addition to providing an excellent mechanism for seed dispersal, led to the invention of the hook and loop fastener. Description Plants of the genus ''Arctium'' have dark green leaves that can grow up to long. They are generally large, coarse and ovate, with the lower ones being heart-shaped. They are woolly underneath. The leafstalks are generally hollow. ''Arctium'' species generally flower from July through to October. Burdock flowers provide essential pollen and nectar for honeybees around August when clover is on the wane and before the goldenrod starts to bloom. Burdock's clinging properties provides it an excellent mechanism for seed dispersal. Taxonomy A large number of species have been placed in genus ''Arctium'' at one time or another, but most of them are now c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipsacus
''Dipsacus'' is a genus of flowering plant in the family Caprifoliaceae. The members of this genus are known as teasel, teazel or teazle. The genus includes about 15 species of tall herbaceous biennial plants (rarely short-lived perennial plants) growing to tall. ''Dipsacus'' species are native to Europe, Asia and northern Africa. Etymology The genus name (''Dipsacus'') is derived from the Greek word for thirst (''dipsa'') and refers to the cup-like formation made where sessile leaves merge at the stem. The name ''teasel'' derives from words such as Old English ''tǣsl'', ''tǣsel''; relating to the verb "to tease" – the dried heads of the plant were once used in the textile industry to raise the nap on woolen cloth. Description Teasels are easily identified with their prickly stem and leaves, and the inflorescence of purple, dark pink, lavender or white flowers that form a head on the end of the stem(s). The inflorescence is ovoid, long and broad, with a basal whorl of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fulling
Fulling, also known as felting, tucking or walking ( Scots: ''waukin'', hence often spelled waulking in Scottish English), is a step in woollen clothmaking which involves the cleansing of woven or knitted cloth (particularly wool) to eliminate (lanoline) oils, dirt, and other impurities, and to make it shrink by friction and pressure. The work delivers a smooth, tightly finished fabric that is isolating and water repellent. Well known example are duffel cloth, first produced in Flanders in the 14th century and loden, produced in Austria from the 16th century on. The practice to do this by hand or feet died out with the introduction of machines during the industrial revolution. Process Fulling involves two processes: scouring and milling (thickening). Originally, fulling was carried out by the pounding of the woollen cloth with a club, or the fuller's feet or hands. In Scottish Gaelic tradition, this process was accompanied by waulking songs, which women sang to set the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
