Japanese knotweed

noun

A large, herbaceous perennial plant, Fallopia japonica, native to Asia; it is a highly invasive colonizer outside of its native territory.

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Meanings

nounJapanese knotweed (uncountable)
  1. uncountableA large, herbaceous perennial plant, Fallopia japonica, native to Asia; it is a highly invasive colonizer outside of its native territory.

    "We got into this because we were looking at invasive species at the roadside, such as Japanese knotweed. A lot of rail embankments have been solidified by knotweed because the roots are so strong.

    2022 June 29, Paul Clifton, “Using AI technology to manage lineside vegetation”, in RAIL, number 960, page 32

Synonyms & antonyms

Also see
billyweedmexican bamboo

Translations

Chinese Mandarin 虎杖
  • 虎杖 (hǔzhàng)Fallopia japonica
Czech křídlatka japonská
  • křídlatka japonskáFallopia japonica
Danish Japan-Pileurt
  • Japan-PileurtFallopia japonica
Dutch japanse duizendknoop
  • japanse duizendknoopFallopia japonica
Finnish japanintatar
  • japanintatarFallopia japonica
French renouée du Japon
  • renouée du JaponFallopia japonica
German japanischer Staudenknöterich
  • japanischer StaudenknöterichFallopia japonica
Hungarian ártéri japánkeserűfű
  • ártéri japánkeserűfűFallopia japonica
Icelandic blómsúra
  • blómsúraFallopia japonica
Irish glúineach bhiorach
  • glúineach bhiorachFallopia japonica
Japanese 虎杖
  • 虎杖 (itadori)Fallopia japonica
Korean 호장근
  • 호장근 (hojanggeun)Fallopia japonica
Lithuanian japoninis pelėvirkštis
  • japoninis pelėvirkštisFallopia japonica
Polish rdestowiec ostrokończysty
  • rdestowiec ostrokończystyFallopia japonica
Russian япо́нский спо́рыш
  • япо́нский спо́рыш (japónskij spóryš)Fallopia japonica
Swedish parkslide
  • parkslideFallopia japonica
Vietnamese cốt khí
  • cốt khíFallopia japonica
Welsh clymog Japan, llysiau'r cythraul
  • clymog JapanFallopia japonica
  • llysiau'r cythraulFallopia japonica
  • pys saethwrFallopia japonica
Cite this entry
APA

Japanese knotweed. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Japanese%20knotweed

MLA

“Japanese knotweed.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Japanese%20knotweed. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Japanese knotweed,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Japanese%20knotweed.

Source: Japanese knotweed on Wiktionary, CC BY-SA 4.0.