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Japanese knotweed is an upright, shrublike, herbaceous perennial that can grow to over 10 feet in height. As with all members of this family, the base of the stem above each joint is surrounded by a membranous sheath. ... Japanese knotweed is designated a noxious weed in the State of Washington.
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www.nps.gov/plants/ALIEN/fact/faja1.htm
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A species profile for Japanese Knotweed from USDA's National Invasive Species Information Center. ... Japanese Knotweed - Wisconsin Botanical Information System; Wisconsin State Herbarium; University of Wisconsin-Madison.; Taxonomy; Photographs; Habitat; Distribution...
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www.invasivespeciesinfo.gov/plants/knotweed.shtml
www.invasivespeciesinfo.gov/plants/knotweed.shtml
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Description of the habitats which Japanese knotweed plants thrive (picture included), an understanding of which can help in its eradication. Eradication of Japanese knotweed plants has become a priority in the U.K. and parts of the U.S. ... Japanese Knotweed Eradication Difficult, But Possible...
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landscaping.about.com/cs/weedsdiseases/a/knotweed.htm
landscaping.about.com/cs/weedsdiseases/a/knotweed.htm
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Japanese knotweed (Polygonum cuspidatum) is a perennial species with spreading rhizomes and numerous reddish-brown, freely branched stems. The plant can reach four to eight feet in height and is often shrubby. The petioled leaves are four to six inches long and generally ovate with an abrupt point.
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www.ecy.wa.gov/Programs/wq/plants/weeds/aqua015.html
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Naturally occurring in dark grape skins and seeds, peanuts, and Japanese knotweed (a fixture in Chinese and eastern medicines for centuries as a cure for heart and liver maladies), among other plants, resveratrol is produced by plants to help fend off attack from molds and other pathogens.
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hubpages.com/hub/Resveratrol
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HABITAT: Japanese knotweed grows on disturbed soil, along roadsides and riverbanks, in other moist areas, and in fields. Often displacing other plants and difficult to eradicate, itís so tasty that some municipalities have surrendered, and hold annual Japanese knotweed festivals instead.
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www.wildmanstevebrill.com/Plants.Folder/Knotweed.html
www.wildmanstevebrill.com/Plants.Folder/Knotweed.html
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Home page for Japanese Knotweed ... Japanese Knotweed Allianc ... Japanese knotweed is one of the most high profile and damaging invasive weeds in Europe and North America.
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www.cabi.org/japaneseknotweedalliance/
www.cabi.org/japaneseknotweedalliance/
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Japanese knotweed is a dense growing shrub reaching heights of 10 ft. (3 m). The semi-woody stem is hollow with enlarged nodes. Leaves are alternate, 6 in. (15.2 cm) long, 3-4 in. (7.6-10 cm) wide and broadly-ovate.
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www.invasive.org/browse/subject.cfm?sub=3414
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