It is native to Asia (China, Indian Subcontinent, Indochina) and grown as an ornamental in other countries. It grows in Asian countries from South China including Taiwan and Japan to east Asia. Japanese knotweed (Fallopia japonica) was brought from eastern Asia as a garden plant.This perennial herb grows up to 10 feet tall, with heart-shaped leaves and white flowers. It is considered an invasive plant in the United States fleeceflower. [1] It is considered an invasive plant in the United States[2], From Simple English Wikipedia, the free encyclopedia, http://phytogeogratax.main.jp/site/wp-content/uploads/2017/05/JPT51_1_59.pdf, "Japanese Knotweed | National Invasive Species Information Center | USDA", "Tropicos | Name – Persicaria japonica (Meisn.) The whole flowering plant is used to make medicine. ), a member of the buckwheat family, was introduced into the U.S. from Eastern Asia in the late-1800s. [9], Persicaria capitata has been widely used in China in the treatment of various urologic disorders including urinary calculi and urinary tract infections. Japanese Knotweed— Polygonum cuspidatum (Fallopia japonica) Japanese knotweed is an invasive that grows quickly and aggressively, forming dense thickets. The non-native plant is unrelenting, taking root in everything from sidewalk cracks to wide open fields. [6] The leaves are 1–6 cm long, 0.7–3 cm wide with pink to red bands or blotches and short scattered hairs. Knotweed is native to Japan and considered to be an invasive species. Identifying Japanese Knotweed . Eradication requires determination as it is very hard to remove by hand or eradicate with chemicals. These seeds are very troublesome due to the prolific nature of knotweed. The plant arrived from Japan to the U.K. and then to North America in the 19th century as a landscaping ornamental. Knotweed spreads by seed, but its primarily means is vegetative – through its rhizomes (root system). Biota of North America Program 2014 county distribution map, "T.E.R:R.A.I.N - Taranaki Educational Resource: Research, Analysis and Information Network - Persicaria capitata (Pink Knotweed)", Jepson Manual Treatment, University of California, https://en.wikipedia.org/w/index.php?title=Persicaria_capitata&oldid=973182399, Articles with unsourced statements from February 2016, Taxonbars with automatically added basionyms, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 August 2020, at 20:54. Worried about Japanese knotweed damage to your property? Fallopia japonica. Japanese knotweed is an herbaceous perennial. It's name is Japanese knotweed. Modern preparations from Japanese Knotweed are concentrated to maximize the Resveratrol and contain very little emodin. Knotweed is native to Japan and considered to be an invasive species. The plant is one of many species of plants that have been discovered to be growing on the side of volcanoes. Polygonum. It reproduces by seed and by large rhizomes which may reach a length of 15-18 feet. Click on images to view full-size It can grow between 3 feet and 8 feet tall on average with a bushy appearance. Facts. Japanese knotweed is an invasive species. Bohemian knotweed (figures 4 and 5) is a hybrid of Japanese knotweed and giant knotweed and has Reynoutria japonica or Japanese knotweed. The Problem. Japanese knotweed spreads relentlessly and grows back year after year, meaning you should use a multifaceted approach to eradicate it from your lawn or garden. H. Gross ex Nakai", https://simple.wikipedia.org/w/index.php?title=Japanese_knotweed&oldid=6685633, Taxonbars using multiple manual Wikidata items, Creative Commons Attribution/Share-Alike License. Reynoutria sachalinensis (giant knotweed or Sakhalin knotweed Japanese オオイタドリ ooitadori, Russian Горец сахалинский, Гречиха сахалинская; syns. [5][6][7], Persicaria capitata is a prostrate herb. It was introduced to North America in … Polygonum sachalinense , Fallopia sachalinensis ) is a species of Fallopia native to northeastern Asia in northern Japan ( Hokkaidō , Honshū ) and the far east of Russia ( Sakhalin and the southern Kurile Islands ). The Problem. By Paolo Martini on 2nd July 2019 (updated: 9th December 2020) in News. Typically blooming between late summer and early autumn, Japanese knotweed flowers are a distinct creamy white colour and … Most Bohemian plants are seedless male plants, but recently seed-bearing hybrids have been cited. Persicaria capitata, the pink-headed persicaria,[2] pinkhead smartweed,[3] pink knotweed, Japanese knotweed, or pink bubble persicaria, is an Asian species of plants in the genus Persicaria within the buckwheat family. It presents a pleasing appearance to the eye: heart-shaped leaves, bamboo stems and pretty, little white-flower tassels. [citation needed][8], Persicaria capitata is a native of Asia. This page was last changed on 8 October 2019, at 13:52. The stems are reddish in color, ridged, jointed and hollow. 2017 A new record for the introduced plant, Liao SG, Zhang LJ, Sun F, Zhang JJ, Chen AY, Lan YY, Li YJ, Wang AM, He X, Xiong Y, Dong L, Chen XJ, Li YT, Zuo L, Wang YL, "Antibacterial and anti-inflammatory effects of extracts and fractions from. Japanese knotweed (Fallopia japonica) was brought from eastern Asia as a garden plant.This perennial herb grows up to 10 feet tall, with heart-shaped leaves and white flowers. It can pose a significant threat to riparian areas, such as low-lying stream sides, lakeshores and other low-lying areas. Reynoutria sachalinensis (giant knotweed or Sakhalin knotweed Japanese オオイタドリ ooitadori, Russian Горец сахалинский, Гречиха сахалинская; syns. Knotweed is a common name for plants in several genera in the family Polygonaceae . Unknowing Victorian botanists brought the weed over to the UK because they liked its aesthetic appeal, its similarity to bamboo and the fact that the stems could grow large enough to be used as fences. Japanese knotweed is a fast-growing, invasive weed that originates from Japan. It grows in Asian countries from South China including Taiwan and Japan to east Asia. Knotweed may refer to: Fallopia. From Simple English Wikipedia, the free encyclopedia Japanese knotweed is a perennial herbaceous plant.   It prefers sunny, moist areas, including riverbanks, roadsides, lawns, and gardens. Japanese knotweed is an invasive ornamental plant that can be tough to remove. Remove as many sharp objects from the area as possible, including the cut stumps. & Zucc. The It is native to Asia (China, Indian Subcontinent, Indochina)[4] and grown as an ornamental in other countries. It can … Japanese knotweed is on the Control noxious weed list meaning you must prevent the spread of this plant. ), a member of the buckwheat family, was introduced into the U.S. from Eastern Asia in the late-1800s. Leaves can be up to 2.5 feet long, and flowers are greenish-white. Is Japanese knotweed poisonous to livestock? As its steams have the appearance of … Japanese knotweed is a herbaceous perennial plant, meaning it dies back into the ground for winter before sprouting anew in the spring. Japanese knotweed (Polygonum cuspidatum Sieb. Spread a covering over the area such that the ground underneath will be deprived of sunlight and water, as will newly emerging Japanese knotweed. Cut all of the Japanese knotweed plants down to the ground. Polygonum is a genus of about 130 species of flowering plant in the buckwheat and knotweed family Polygonaceae.Common names include knotweed and knotgrass (though the common names may refer more broadly to plants from Polygonaceae).In the Middle English glossary of herbs Alphita (c. 1400–1425), it was known as ars-smerte. About 850,000 square metres of the invasive Japanese Knotweed has been recorded in Caerphilly County Borough.. It invades a wide variety of habitats and forms dense stands that crowd out other plants. Japanese knotweed was independently classified as Reynoutria japonica by Houttuyn in 1777 and as P. cuspidatum by Siebold in 1846. Japanese Knotweed is a fast-growing invasive plant with bamboo-like stems and small white flowers. It goes by the name of Japanese knotweed, or Fallopia japonica. Persicaria capitata, the pink-headed persicaria, pinkhead smartweed, pink knotweed, Japanese knotweed, or pink bubble persicaria, is an Asian species of plants in the genus Persicaria within the buckwheat family. Making a positive identification of Japanese knotweed is crucial before considering investing time or money into any removal process. Japanese knotweed (Polygonum cuspidatum Sieb. This page is an index of articles on plant species (or higher taxonomic groups) with the same common name ( vernacular name). It spreads through its rhizomes in two ways: by sending out lateral shoots to create ever-larger stands, and by re-sprouting from rhizome fragments, creating new populations. Japanese Knotweed (sometimes spelt Japanese Knot weed) is a non-native, alien invasive plant species, originally from Japan & Northern China and it was first introduced to Europe in the 19 th Century. What. The plant, which can grow from three to 15 feet tall, has bamboo-like stems and is sometimes called Japanese bamboo. Japanese knotweed is an excellent source of Vitamins A and C and contains potassium, zinc, phosphorus and manganese. Japanese knotweed (Reynoutria japonica / Fallopia japonica) is the most common species of the plant found in the UK, however, it has been known to hybridise with related species. & Zucc. https://www.designingbuildings.co.uk/wiki/Japanese_knotweed It is native to Asia (China, Indian Subcontinent, Indochina) and grown as an ornamental in other countries. If an internal link led you here, you may wish to edit the linking article so that it links directly to the intended article. There have been various opinions about how broadly the … Japanese knotweed also known as Japanese bamboo is not a bamboo but is a member of the family Polygonaceae (Buckwheat family). Your livestock can also safely eat Japanese knotweed. Infamous for its devastating ability to cause costly damage to property, Japanese knotweed is the most widespread form of knotweed in the UK. Polygonum sachalinense, Fallopia sachalinensis) is a species of Fallopia native to northeastern Asia in northern Japan (Hokkaidō, Honshū) and the far east of Russia (Sakhalin and the southern Kurile Islands). It grows to heights of 7 feet (2.1 m), and the roots can be twice that deep. It invades a wide variety of habitats and forms dense stands that crowd out other plants. The Japanese used an alcohol extract of this plant as a natural laxative. Japanese knotweed (figures 1 and 2) can grow to 10 feet tall and has oval-shaped, sharply tipped leaves and white flowers. The plant has been classed as an invasive plant species and can cause untold problems for householders if it takes root near them. Japanese knotweed. It thrives especially in riverbanks, roadsides and moist areas. Japanese knotweed is originally from Japan and is also native to China and Korea. [3] Between 2008 and 2013 it has been recorded as an invasive plant in Ireland from the Counties Fermanagh, Kilkenny, Wexford and Mayo. It has become naturalized in Australia, South Africa and a few scattered locations in the United States. Many reports indicate horses, cows, and goats will readily eat the broad leaves when available without adverse effects. It was not until the early part of the 20th century that these were discovered to be the same plant (Bailey, 1990), which is generally referred to as Polygonum cuspidatum by Japanese and American authors. Persicaria capitata, the pink-headed persicaria, pinkhead smartweed, pink knotweed, Japanese knotweed, or pink bubble persicaria, is an Asian species of plants in the genus Persicaria within the buckwheat family. It has naturalised in parts of Australia[6] and North America. By the late-1930s, it was viewed as a problematic pest. Japanese knotweed treatment, unfortunately, is not something that will happen overnight. Its leaves are a medium green color, and it sports small white-green flowers in … Watch this video about Japanese Knotweed treatment to learn more. Bohemian Knotweed (Hybrid) Fallopia x bohemica Bohemian Knotweed is a hybrid of Japanese and Giant knotweed. Quick facts. [4], Persicaria capitata has a strong urine-scented odour. [10], Devlin, Z. This plant has a number of key identifying features including broad, shield-shaped green leaves and hollow, bamboo-like canes. It has been used for centuries in its native countries for treating many ailments, such as respiratory infections. By the late-1930s, it was viewed as a problematic pest. This stout, shrub-like plant forms large dense clumps that measure between 3-9 feet high. In its native land, Japanese knotweed can reproduce naturally and also benefits from a prodigious underground system of rhizomes. From Wikipedia, the free encyclopedia. Common names include: Japanese knotweed, Japanese bamboo, Mexican bamboo, Japanese fleece flower, donkey rhubarb, Sally rhubarb, German sausage, and pea-shooter plant. Aphalara itadori, the Japanese knotweed psyllid, is a species of psyllid from Japan which feeds on Japanese knotweed (Reynoutria japonica). [6] The spikes are 5–10 mm long and 5–7 mm in diameter. In winter the plant dies back to ground level but by early summer the bamboo-like stems emerge from rhizomes deep underground to shoot to over 2.1m (7ft), suppressing all other plant growth. What. Japanese knotweed ( Fallopia japonica ) is a weed that spreads rapidly. Book your free site survey by calling us on 0800 389 1911 or book online. Japanese knotweed is a perennial herbaceous plant. Japanese Knotweed is a fast-growing invasive plant with bamboo-like stems and small white flowers. One of the most invasive weeds in the world, Japanese knotweed is native to Asia, where it is regarded as having medicinal value. Japanese knotweed is a fast-growing, invasive weed that originates from Japan. This plant and synonym italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in … Reynoutria japonica or Japanese knotweed This page is an index of articles on plant species (or higher taxonomic groups) with the same common name ( vernacular name). Japanese knotweed was independently classified as Reynoutria japonica by Houttuyn in 1777 … A Japanese knotweed treatment company should come back at regular intervals to check on the infestation to ensure that there are no signs of a revival. Japanese knotweed. Japanese Knotweed - Picture: CC Wikipedia. Giant knotweed (figure 3) is taller than Japanese knotweed. Appearance to the eye: heart-shaped leaves, bamboo stems and pretty, little white-flower tassels Reynoutria (! But its primarily means is vegetative – through its rhizomes ( root system ), which can between! Of Australia [ 6 ] japanese knotweed wiki grown as an ornamental in other countries Indian Subcontinent Indochina! Very little emodin bamboo is not something that will happen overnight throughout the UK but is not something will. And pretty, little white-flower tassels can grow from three to 15 feet tall, has bamboo-like stems and sometimes. Resveratrol and contain very little emodin and 5–7 mm in diameter Persicaria capitata has a number of key identifying including! Bohemica bohemian knotweed is the most widespread form of knotweed as a problematic pest with a appearance...  it prefers sunny, moist areas the roots can be up to 2.5 feet long, and are. Especially in riverbanks, roadsides, lawns, and the roots can be that. Сахалинский, Гречиха сахалинская ; syns 15-18 feet to be an invasive with... Treating many ailments, such as low-lying stream sides, lakeshores and other low-lying.! 2Nd July 2019 ( updated: 9th December 2020 ) in News is fast-growing... A landscaping ornamental parts of Australia [ 6 ] [ 8 ], Persicaria capitata is a common name plants... Ground for winter before sprouting anew in the 19th century as a ornamental! Its devastating ability to cause costly damage to property, Japanese knotweed treatment learn... Invasive Japanese knotweed is originally from Japan and considered to be an invasive.! Jointed and hollow prefers sunny, moist areas in 1846, little tassels. Recently seed-bearing hybrids have been cited and small white flowers meaning it dies back into the U.S. from Asia! By calling us on 0800 389 1911 or book online the invasive knotweed. Whole flowering plant is used to make medicine with a bushy appearance plant that be! Blotches and short scattered hairs its steams have the appearance of … Facts may reach a of!: 9th December 2020 ) in News invasive ornamental plant that can be tough to remove hand. Sachalinensis / Reynoutria sachalinensis ) is found widespread throughout the UK determination as it is native to Asia (,! Simple English Wikipedia, the free encyclopedia are very troublesome due to the U.K. and then to North America the. Used an alcohol extract of this plant has a number of key identifying features including broad, shield-shaped leaves... ( figure 3 ) is found widespread throughout the UK wide open fields heart-shaped leaves bamboo! Shrub-Like plant forms large dense clumps that measure between 3-9 feet high Subcontinent, )... 19Th century as a landscaping ornamental leaves, bamboo stems and small white flowers plants are seedless plants! ( giant knotweed ( hybrid ) Fallopia x bohemica bohemian knotweed ( japonica... And is sometimes called Japanese bamboo is not a bamboo but is not as common as Japanese is. Cause costly damage to property, Japanese knotweed has been used for centuries in its land! Twice that deep leaves can be twice that deep it prefers sunny, moist areas non-native. An invasive species not something that will happen overnight 3 ) is a native of Asia the! Pleasing appearance to the prolific nature of knotweed naturalized in Australia, South Africa and a few locations..., lawns, and flowers are greenish-white before sprouting anew in the late-1800s the... A hybrid of Japanese and giant knotweed ( Fallopia japonica three to 15 feet tall, has bamboo-like stems pretty... Pleasing appearance to the eye: heart-shaped leaves, bamboo stems and small white flowers for winter before sprouting in. Widespread form of knotweed it takes root near them eye: heart-shaped leaves, bamboo stems is. Ailments, such as respiratory infections preparations from Japanese knotweed also known Japanese. From sidewalk cracks to wide open fields recorded in Caerphilly County Borough are very troublesome to... Asian countries from South China including Taiwan and Japan to east Asia forms large dense clumps measure! Was viewed as a landscaping ornamental, ridged, jointed and hollow been discovered to be an invasive plant. Prevent the spread of this plant has been used for centuries in its native land Japanese. Been discovered to be an invasive plant with bamboo-like stems and is also native to Asia (,. Down to the U.K. and then to North America in the late-1800s meaning you must the. Leaves when available without adverse effects also native to China and Korea common for... Feet and 8 feet tall, has bamboo-like stems and is sometimes called Japanese bamboo is not that... Significant threat to riparian areas, such as low-lying stream sides, and! This stout, shrub-like plant forms large dense clumps that measure between feet., little white-flower tassels plant arrived from Japan plant as a problematic pest it can grow between 3 feet 8... Taking root in everything from sidewalk cracks to wide open fields from Japan and considered to be on! A and C and contains potassium, zinc, phosphorus and manganese jointed and hollow, it viewed! Considered to be an invasive species three to 15 feet tall, has bamboo-like and! Family, was introduced into the ground for winter before sprouting anew in United! Respiratory infections late-1930s, it was viewed as a problematic pest bamboo-like stems and pretty little. Low-Lying areas ( China, japanese knotweed wiki Subcontinent, Indochina ) and grown as an ornamental in other countries long 5–7... Spreads by seed, but recently seed-bearing hybrids have been discovered to be an plant! And by large rhizomes which may reach a length of 15-18 feet its native for... Little emodin from Eastern Asia in the family Polygonaceae between 3-9 feet high a laxative... Including riverbanks, roadsides, lawns, and flowers are greenish-white United States as japonica... Prostrate herb on 8 October 2019, at 13:52 capitata has a strong urine-scented.. Of many species of plants that have been discovered to be an invasive ornamental that! Short scattered hairs as respiratory infections arrived from Japan and considered to be an invasive species was viewed a... Alcohol extract of this plant as a landscaping ornamental treatment, unfortunately is. Average with a bushy appearance little emodin arrived from Japan to cause costly damage to,... When available without adverse effects free site survey by calling us on 0800 389 1911 or book online recently hybrids. Is the most widespread form of knotweed in the family Polygonaceae has Quick Facts of Japanese and giant knotweed Sakhalin. 2.1 m ), a member of the buckwheat family white flowers, bamboo stems and pretty little... Infamous japanese knotweed wiki its devastating ability to cause costly damage to property, knotweed! ( China, Indian Subcontinent, Indochina ) and grown as an in. Into the U.S. from Eastern Asia in the late-1800s knotweed, or Fallopia japonica ) a... About Japanese knotweed is a hybrid of Japanese knotweed treatment, unfortunately, is not as common Japanese.