& Zucc. 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. Clinical Overview Use. Japanese knotweed (Japanese bamboo) Polygonum cuspidatum. 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. As with Japanese knotweed it was brought to Europe to be grown in botanical gardens. Japanese Knotweed. Japanese knotweed Polygonum cuspidatum, Japanese knotweed. 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. It has also escaped into the wild where it is spreading. Japanese knotweed is a highly invasive plant and one that can cause damage to property in its path. Overview Information Knotweed is an herb. Scientific Name(s): Polygonum cuspidatum Siebold & Zucc. It was brought in from Japan, Korea and China in the 19th century and has spread rapidly across the UK since then. Last updated on Dec 25, 2019. Japanese Knotweed. Originally imported as an ornamental screen or hedge plant, Japanese knotweed … Look up the regulations concerning Japanese knotweed in your area. Common Name(s): Fleeceflower, Huzhang, Japanese bamboo, Japanese knotweed, Mexican bamboo Medically reviewed by Drugs.com. The whole flowering plant is used to make medicine. Citation: Tom Heutte, USDA Forest Service, www.invasives.org Background. Japanese knotweed . wide, oval with smooth margins; stems similar to bamboo, but on new foliage a membranous sheath surrounds area where stem and leaf meet; … Back to Invasive Plant Photos and Information. 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. Find out what Japanese knotweed … Huzhang (Japanese Knotweed) has been used in traditional Chinese medicine as well as in Japan and Korea for … Japanese knotweed (Polygonum cuspidatum Sieb. 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, (Fallopia japonica), is 'indisputably the UK’s most aggressive, destructive and invasive plant' affecting houses and gardens. photo credit Tom Heutte, bugwood.org . Life cycle: herbaceous perennial Growth habit: grows up to 10 ft. high; shrubby; leaves 6 in. It is similar to Japanese knotweed in many respects but is larger, growing over 4m high and having leaves around 20-40cm long. It is a robust, bamboo-like perennial that spreads by long creeping rhizomes to form dense thickets. A thicket of Japanese knotweed. ), 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. long by 3 in. Japanese knotweed is often confused with its hybrid Bohemian knotweed and the closely related giant knotweed. Family: Smartweed, Polygonaceae.. 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