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Japanese Knotweed

Flowering Plants

Reynoutria japonica, also known by the synonyms Fallopia japonica and Polygonum cuspidatum, is a herbaceous perennial plant in the knotweed and buckwheat family native to Japan, China and Korea, commonly called Japanese knotweed or Asian knotweed. Successfully established across numerous habitats in North America and Europe, it is classified as a pest and invasive species in several countries, even as its young stems are popular with foragers, prized for a flavor described as lemony rhubarb, and its flowers are valued by beekeepers.

Facts
Classification
Diet
Photosynthetic Autotroph 1
System (Realm)
Terrestrial 2
Threats
Invasive and Other Problematic Species, Genes and Diseases 1
Relationship to People
Invasive or Introduced Species 1
Comparison
NatureServe Rank
GNR Unranked 3
CITES Appendix
Not Listed 4
Identification
Distinguishing Appearance
Hollow stems with distinct raised nodes giving a bamboo-like appearance 1
Scientific Name
Reynoutria japonica 1
Conservation Status
Not Evaluated 5
Connections

Child Taxon Of

Polygonaceae, Taxa
Source Wikidata: Japanese Knotweed

In Biome

Temperate Forest, Biomes
Source Plants For A Future: Reynoutria japonica
Wetlands, Biomes
Source Plants For A Future: Reynoutria japonica
In the Other Atlases

Found In

Austria

Also in Geography Atlas: where this subject is found.

Belgium

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Bulgaria

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Denmark

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Finland

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France

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Georgia

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Germany

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Hungary

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Ireland

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Italy

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Japan

Also in Geography Atlas: where this subject is found.

Manchuria

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Myanmar

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Netherlands

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Norway

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Poland

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Portugal

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Romania

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Spain

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Sweden

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Switzerland

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Taiwan

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Ukraine

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Vietnam

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Sources
1. Reynoutria japonica - Wikipedia
  • Lead paragraph, first sentence
    Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum
  • Description
    hollow stems with distinct raised nodes that give it the appearance of bamboo
  • threat (MediaWiki batch-API article extract states it plainly)
    In North America and Europe, the species has successfully established itself in numerous habitats; it is classified as a pest and invasive species in several countries.
  • human-interaction (MediaWiki batch-API article extract states it plainly)
    In North America and Europe, the species has successfully established itself in numerous habitats; it is classified as a pest and invasive species in several countries.
  • lead sentence (diet), EntityId 286038
    Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum, is a species of herbaceous perennial plant in the knotweed and buckwheat family Polygonaceae.
View the Source
2. GBIF Species API
GBIF Species APIView the Source
3. NatureServe Explorer: Reynoutria japonica
NatureServe ExplorerGlobal rank (roundedGRank)
Quote, Global rank (roundedGRank)
"roundedGRank": "GNR"
View the Source
4. UNEP-WCMC Species+ database (CITES Secretariat): Species+: Caryophyllales
UNEP-WCMC Species+ database (CITES Secretariat)Species+ taxon_concepts, id 12413
Quote, Species+ taxon_concepts, id 12413
"cites_listing":"I/II/III/NC","eu_listing":"A/B/C/NC","higher_taxa":{"kingdom":"Plantae","phylum":null,"class":null,"order":"Caryophyllales","family":null},"synonyms":[],"common_names":[],"cites_listings":[]
View the Source
5. GBIF Backbone Taxonomy (IUCN Red List category): IUCN Red List category of Reynoutria japonica
GBIF Backbone Taxonomy (IUCN Red List category)iucnRedListCategory record
Quote, iucnRedListCategory record
"category": "NOT_EVALUATED"
View the Source
IUCN Red List of Threatened Species
International Union for Conservation of NatureView the Source
Wikidata: Japanese Knotweed
  • Wikidata Q18421053, class allow-list match (w-wdresolver-0926)
  • Child Taxon Of: Polygonaceae, Wikidata parent-taxon (P171) chain
View the Source
Plants For A Future: Reynoutria japonica
Plants For A Future
  • In Biome: Temperate Forest, Habitats
    Cold to warm temperate. It grows in forests and humid areas. It grows in wetlands.
  • In Biome: Wetlands, Habitats
    Cold to warm temperate. It grows in forests and humid areas. It grows in wetlands.
View the Source
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