wide, oval with smooth margins; stems similar to bamboo, but on new foliage a membranous sheath surrounds area where stem and leaf meet; … Last updated on Dec 25, 2019. Look up the regulations concerning Japanese knotweed in your area. Japanese knotweed is often confused with its hybrid Bohemian knotweed and the closely related giant knotweed. Japanese knotweed . photo credit Tom Heutte, bugwood.org . As with Japanese knotweed it was brought to Europe to be grown in botanical gardens. The whole flowering plant is used to make medicine. Overview Information Knotweed is an herb. Japanese knotweed (Japanese bamboo) Polygonum cuspidatum. Huzhang (Japanese Knotweed) has been used in traditional Chinese medicine as well as in Japan and Korea for … Japanese Knotweed in property: What you need to know Japanese Knotweed, as you might have guessed from the name, is not a native plant to the UK. Citation: Tom Heutte, USDA Forest Service, www.invasives.org Background. Clinical Overview Use. Originally imported as an ornamental screen or hedge plant, Japanese knotweed … It is similar to Japanese knotweed in many respects but is larger, growing over 4m high and having leaves around 20-40cm long. & Zucc. Japanese Knotweed, (Fallopia japonica), is 'indisputably the UK’s most aggressive, destructive and invasive plant' affecting houses and gardens. Japanese Knotweed. It has also escaped into the wild where it is spreading. Because Japanese knotweed is classified as “controlled waste” by the 1990 Environmental Protection Act, many places, like the United Kingdom, require you to dispose of it at a licensed landfill site. 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.. Japanese Knotweed was first introduced to Britain by the Victorians as an ornamental plant – and was actually awarded a gold medal at a prestigious flower show. Find out what Japanese knotweed … A thicket of Japanese knotweed. It is a robust, bamboo-like perennial that spreads by long creeping rhizomes to form dense thickets. Common Name(s): Fleeceflower, Huzhang, Japanese bamboo, Japanese knotweed, Mexican bamboo Medically reviewed by Drugs.com. Family: Smartweed, Polygonaceae.. Habitat: The species occupies a wide variety of habitats in many soil types and a range of moisture conditions.It is most common along roadsides and on stream banks, but is also found in low-lying areas, utility rights-of-way, old home sites and along woodland edges and openings. Japanese knotweed is a highly invasive plant and one that can cause damage to property in its path. Environet are the UK’s leading specialists in Japanese knotweed eradication and our trademarked solutions are suitable for both commercial and residential properties.. For more than the 20 years, our teams have been helping business and homeowners across the UK battle against this harmful weed. Japanese knotweed (Polygonum cuspidatum Sieb. Japanese Knotweed. Life cycle: herbaceous perennial Growth habit: grows up to 10 ft. high; shrubby; leaves 6 in. 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 different places, and some are listed above. long by 3 in. ), a member of the buckwheat family, was introduced into the U.S. from Eastern Asia (Japan, China, Korea) as an ornamental on estates in the late-1800s. Back to Invasive Plant Photos and Information. It was brought in from Japan, Korea and China in the 19th century and has spread rapidly across the UK since then. Scientific Name(s): Polygonum cuspidatum Siebold & Zucc. Japanese knotweed Polygonum cuspidatum, Japanese knotweed. 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