University of Maine Cooperative Extension. This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. Persicaria japonica Nakai. It is considered an invasive plant in the United States. Although used for various applications, few clinical studies validate claims and guidance regarding dosing or safety is limited. Its scientific name is Lyme Borreliosis. japonica in the UK. Center for Invasive Species and Ecosystem Health. Japanese knotweed – Fallopia japonica Japanese knotweed is the flowering plant in the Buckwheat family Polygonaceae. Australian Government. Family Polygonaceae Scientific Name Polygonum cuspidatum ← → Other Common Names: Japanese bamboo. This invasive shrub has vigorous rhizomes and colonizes roadsides and riparian areas. Gallery: Common names: Japanese knotweed (Japanese bamboo, sally rhubarb, fleeceflower, and Himalayan fleece vine, Mexican bamboo, false bamboo) Giant knotweed (sacacline, sakhalin knotweed) Bohemian knotweed (Japanese-Giant hybrid) Scientific Name: Japanese knotweed: Fallopia japonica (syns. Ohio Agricultural Research and Development Center. Fever, headache, and fatigue may include early symptoms of Lyme. The plant arrived from Japan to the U.K. and then to North America in the 19th century as a landscaping ornamental. The common name in English is Japanese knotweed. Washington State Noxious Weed Control Board. The fruits are small, brown, and triangular in shape and mature from September to January. It can also create a fire hazard in the dormant season. The scientific names of Polygonum cuspidatumor Reynoutria japonicaare also used. Leaves are 4 to 6 inches long and pointed. For information specific to the activity of resveratrol, see … Marine Invasions Research Lab. Japanese Knotweed (Fallopia japonica) is an invasive, perennial herbaceous plant that is also known as Mexican Bamboo, Fleeceflower, Japanese Polygonum or Huzhang. Japanese knotweed escaped cultivation, overtook desirable vegetation and was recognized as a problem by the early 1900s. Why is it a problem? See also: Included on California's noxious weed list; see. Washington State Recreation and Conservation Office. Ecology: Japanese Knotweed forms dense stands and aggressively outcompetes native vegetation. Pennsylvania Sea Grant. Smithsonian Institution. Polygonum L. – knotweed Species: Polygonum cuspidatum Siebold & Zucc. Washington Invasive Species Council. Scientific name: Fallopia japonica Also known as: Japanese Bamboo, Pysen Saethwr Key Facts • Japanese knotweed (Fallopia japonica) is an invasive plant that can cause damage to property, and is very difficult to control once established. The Japanese common name 'itadori' has a literal meaning 'take away pain'. In 70 to 80 percent of the infected persons, a rash occurs at the site of bite after a delay of about 3 to 30 days. Japanese knotweed is native to eastern Asia and was imported to England in the mid-1800s as an ornamental. Huzhang (Japanese Knotweed) has been used in traditional Chinese medicine as well as in Japan and Korea for many years. Cooperative Extension. Or, to display all related content view all resources for Japanese Knotweed. YouTube; University Nebraska - Lincoln. JAPANESE KNOTWEED Scientific Name: Fallopia japonica Maximum Stem height: 3–4 m (9.8–13.1 ft) 2. Noxious Weed Program. In the late 1800s, it was brought to the United States and was planted in gardens and used for erosion control along roadways and embankments. The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) has issued the final environmental assessment (EA) for releasing Japanese knotweed psyllid (Aphalara itadori) to manage Japanese, giant, and bohemian knotweeds (Fallopia japonica, F. sachalinensis, and their hybrid, F. x bohemica). When using herbicides remember to follow label-recommendations. Invasive Plant Species Assessment Working Group. The closely related Fallopia sachalinensis can hybridize with F. japonica to form Fallopia x bohemica, first described in 1983, which is proving to be more problematic than F. japonica var. Reynoutria japonica, Polygonum cuspidatum) Giant knotweed: Fallopia sachalinensis (syns. Pennsylvania State University. Cut the stems off above the waterline and treat the outer cut surface (the stems are hollow) with a plain glyphosate product such as Accord or Rodeo (53.8%). Department of the Environment and Energy. Polygonum zuccarinii . After careful analysis, APHIS has determined that releasing Japanese knotweed psyllid within the continental United States is not likely to have a significant impact on the environment. Japanese knotweed (scientific name Fallopia japonica), is sometimes known locally as donkey rhubarb. It is commonly known as Asian knotweed or Japanese knotweed. Identifying Japanese Knotweed . Going Native: Urban Landscaping for Wildlife with Native Plants. Many large supplement sources of resveratrol now use Japanese knotweed and use its scientific name in the supplement labels. Common Name: Japanese Knotweed. National Invasive Species Information Center, Early Detection & Distribution Mapping System (EDDMapS) - Japanese Knotweed, Invasive Plants of Ohio: Fact Sheet 10 - Japanese Knotweed (PDF | 254 KB), Southeast Exotic Pest Plant Council Invasive Plant Manual - Japanese Knotweed, Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Japanese Knotweed, Giant Knotweed, Bohemian Knotweed (Feb 7, 2011) (PDF | 304 KB), Invasive Plant Atlas of the United States - Japanese Knotweed, New York Invasive Species Information - Japanese Knotweed, Non-native Species Information: Japanese Knotweed, National Exotic Marine and Estuarine Species Information System (NEMESIS): Chesapeake Bay Introduced Species Database -, New Hampshire's Prohibited Invasive Plant Fact Sheets, Invasive Species Best Control Practices - Japanese Knotweed (2012) (PDF | 373 KB), Invasive Plant Species Fact Sheet: Japanese Knotweed (2006) (PDF | 734 KB), Field Guide: Invasive - Japanese Knotweed, Invasive Plants in Pennsylvania: Japanese Knotweed and Giant Knotweed (PDF | 162 KB), King County (Washington) Noxious Weed Control Program - Japanese Knotweed, Noxious Weed Species - Japanese, Giant, and Bohemian Knotweeds, Introduced Species Summary Project - Japanese Knotweed, Invasive Plants and Insects: Japanese and Giant Knotweed, Invasive, Exotic Plants of the Southeast - Japanese Knotweed, Maine Invasive Plants Bulletin: Japanese Knotweed / Mexican Bamboo, Ohio Perennial & Biennial Weed Guide - Japanese Knotweed. Water and Land Resources Division. Japanese knotweed is the most common of four invasive knotweed taxa present in the UK (Japanese and Dwarf knotweeds being varieties of the same species): Based on this determination, APHIS will not prepare an environmental impact statement and will begin issuing permits for the release of Japanese knotweed psyllid. japonica (previously Fallopia japonica) Other Schedule 9 Species: Dwarf knotweed, Giant knotweed, Bohemian (hybrid) knotweed What is Japanese knotweed? Taxonomy. upright, tall, smooth, noticeably jointed, hollow between nodes, reddish-purple mottling, ocrea (papery or membranous sheath) at nodes Scientific name: Reynoutria japonica var. Michigan Department of Natural Resource; Michigan State University Extension. Name Japanese knotweed; Scientific Name: Fallopia japonica: Native: Native to Eastern Asia. Cooperative Extension. Scientific name: Fallopia japonica AKA: Japanese Bamboo, Pysen saethwr (Welsh), Polygonum cuspidatum, Reynoutria japonica Native to: Japan, Taiwan, northern China Habitat: Common in urban areas, particularly on waste land, railways, road sides and river banks. Japanese Knotweed Japanese knotweed, scientific name Fallopia japonica, is a perennial plant with a matrix of vigorous underground stems called rhizomes.It has distinctive, branching, hollow, bamboo-like stems, covered in purple speckles, often reaching 2-3 m high. The stems are reddish-brown and freely branched. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. It goes by the name of Japanese knotweed, or Fallopia japonica. Scientific Name: Polygonum cuspidatum. Fallopia japonica . It spreads by water dispersed seeds and through transport by humans. The section below contains highly relevant resources for this species, organized by source. Any mention of trade, products, or firm names is for descriptive purposes only and does not imply endorsement by North Carolina State University. Provides state, county, point and GIS data. North Carolina State University. Monitor re-growth and re-treat as needed to achieve control. This infectious disease is caused via the bite of an infected tick. It is native to East Asia in Japan, China and Korea. It is the most invasive plant in Guernsey (and in Britain). Japanese knotweed, (scientific name Fallopia japonica), also known as donkey's rhubarb, was introduced to Britain from the Far East in 1825 as an ornamental plant. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. If the Japanese Knotweed is in an aquatic habitat, you will need to use a product such as Rodeo or AquaNeat. Classification: Plantae Glyphosate by itself will not harm aquatic habitats but surfactant-loaded glyphosate formulations like Roundup can be highly toxic to amphibians, frogs, and other aquatic fauna. It grows very aggressively along roadways, neglected gardens, streambeds, and in moist, wet places. Japanese knotweed. In Japan, known as itadori. Leaves are 4 to 6 inches long and pointed. National Genetic Resources Program. Common names include Fleece Flower, Monkeyweed, Himalayan Fleece Vine, Hancock’s Curse, Tiger Stick, Pea Shooters, Sally Rhubarb, Donkey Rhubarb, Mexican Bamboo, Huzhang or Japanese Polygonum. USDA. • It is listed under schedule 9 of the Wildlife and Countryside Alternative Native Species: Virginia Willow (Itea virginica), Sweet Pepperbush (Clethra alnifolia). Michigan Natural Features Inventory. Common Name: Japanese knotweed, Mexican bamboo. Japanese knotweed is a perennial herbaceous plant. Other scientific names that have been associated with Fallopia Japonica have included the following: Polygonum reynoutria (Makino) Pennsylvania Department of Conservation and Natural Resources. It grows in Asian countries from South China including Taiwan and Japan to east Asia. Its scientific name is Fallopia Japonica but the family also includes derivatives such as Giant Knotweed and Himalayan Knotweed. California Department of Food and Agriculture. It is the most invasive plant in Britain. It was first introduced to the UK in the mid nineteenth century as an ornamental plant. Columbia University. The significance of Japanese knotweed (scientific name Fallopia japonica), and the potential problems it can bring, has been the subject of increased publicity in recent years as accounts of it pushing its way through tarmac and concrete and growing at excessive rates have been reported. Is It Here Yet? Pleuropterus zuccarinii . 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. References Center for Environmental Research and Conservation. It is also available in the Europe, British Isles, USA, Canada, New Zealand and Newfoundland. Google. It is a very aggressive escaped ornamental that is capable of forming dense stands, crowding out all other vegetation and degrading wildlife habitat. In North America and Europe, the species has successfully established itself in numerous habitats, and is classified as a pest and invasive species in several countries. GRIN-Global. Japanese knotweed, fleeceflower, Mexican bamboo, huzhang. While Japanese knotweed was originally placed in the large genus Polygonum (see below), taxonomists in Europe have long seen reason to separate this and closely related species taxonomically. Japanese and American authors still often refer to Japanese knotweed as Polygonum cuspidatum. Japanese knotweed, an escaped ornamental, is a shrubby perennial that was first introduced in the United States from Asia. It is difficult to control once established. Japanese knotweed is a member of the buckwheat family. Japanese knotweed is native to Japan, Taiwan and China It was introduced to Britain by the Victorians in the 1800s as an ornamental garden plant. Animal and Plant Health Inspection Service. New Hampshire Department of Agriculture, Markets, and Food. Scientific Name: Polygonum cuspidatum (most common name in U.S. and Japan), also known as Reynoutria japonica (most common in U.K. and Europe), a movement exists to standardize name as Fallopia japonica. Alaska Center for Conservation Science. – Japanese knotweed Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum, is a large species of herbaceous perennial plant of the knotweed and buckwheat family Polygonaceae. Conservation Services Division. Division of Plant Industry. Overview Other names for this plant include: Common names: Japanese bamboo, Mexican bamboo, fleece flower; Scientific names: Fallopia japonica; Polygonum reynoutria; Reynoutria japonica Ecological threat: New infestations of Japanese knotweed often occur when soil contaminated with rhizomes is transported or when rhizomes are washed downstream during flooding. Colorado Department of Agriculture. Pennsylvania State University. The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) has issued the final environmental assessment (EA) for releasing Japanese knotweed psyllid (Aphalara itadori) to manage Japanese, giant, and bohemian knotweeds (Fallopia japonica, F. … It is native to Asia (China, Indian Subcontinent, Indochina) and grown as an ornamental in other countries. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Japanese Knotweed, also known as Donkey’s Rhubarb or Mexican bamboo (scientific name Fallopia japonica), was introduced to Britain from the Far East in 1825 as an ornamental plant.   It prefers sunny, moist areas, including riverbanks, roadsides, lawns, and gardens. Smithsonian Environmental Research Center. Indiana Department of Natural Resources. Plant Control: Apply a glyphosate herbicide in combination with cutting. Reynoutria japonica . The stems are reddish-brown and freely branched. ARS. Identification: Japanese Knotweed is a perennial shrub reaching 4 to 8 feet in height. Cornwall County Council (United Kingdom). Great Britain Non-Native Species Secretariat. University of Georgia. USDA. Synonyms (former Scientific Names): Pleuropterus cuspidatus . Ohio State University. Japanese knotweed plants in Europe and North America ar… Maps can be downloaded and shared. Japanese Knotweed. Identification: Japanese Knotweed is a perennial shrub reaching 4 to 8 feet in height. Extension. Both Japanese knotweed and giant knotweed are important concentrated sources of resveratrol and its glucoside piceid, replacing grape byproducts. Wisconsin Department of Natural Resources. Ontario's Invading Species Awareness Program (Canada). The white flowers are on drooping panicles and appear from August to November. Tall herbaceous perennial with bamboo like stems. University of Alaska - Anchorage. 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