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Reynoutria japonica in bloom

Japanese Knotweed is an invasive plant difficult to eradicate. It can damage infrastructure.

Fresh japanese knotweed or Reynoutria japonica leaves and flowers on a wooden table

Wide spreading invasive growth called Parkslide

Reynoutria japonica or Japanese knotweed along the river Hollandsche IJssel as an invasive exotic weed in the Netherlands

Flowers in BC, Canada

In summer, the perennial plant Reynoutria grows in nature

$Short to medium, erect to rather sprawling, hairless, branched annual. Leaves lanceolate, tapered at the base, often with a large blackish blotch; ochrea brown, shortly fringed. Flowers crowded, in stout short spikes, pale to bright pink. Nut black, glossy.\nHabitat: Waste, bare and cultivated land, railway embankments, often close to water especially along rivers, streams and canals, sometimes abundant on heavy non-calcareous soils.\nFlowering Season: June-October.\nDistribution: Throughout Europe, except Spitsbergen.\n\nThis is a common Species in the Netherlands.$

Flowering Japanese Knotwood Bush

Japanese Knotweed is an agressive invasive plant that is difficult to remove.

Wild flower in the field

Pollia japonica, also known as East Asia pollia, is a perennial flower in the family Commelinaceae, native to East Asia. Its rhizome is a herb in traditional Chinese medicine used as analgesic, discutient (reducing swelling) and deodorant.

Blossoms of the Japanese Knotweed (Fallopia japonica), an invasive plant species in Europe.

Blackberry bush, Rubus fruticosus in autumn colors - the plant is popular in hedges and other places where you try to restrict peoples movements. The picture is taken at Kalvebod Fælled - Kalvebod Commons, which is a nature area and public park close to the center of Copenhagen

Japanese Knot weed highly invasive plant very difficult to remove

Spring blooms

Blooming Sakhalin Knotweed or Fallopia sachalinensis in summer

Japanese Knotweed is an invasive plant.

Sendai City Aobayama

Japanese knotweed ((Fallopia japonica)) was introduced to Britain in the 19th century as an ornamental plant, and won a gold medal at a prestigious flower show under its previous name of (Polygonum cuspidatum). However, once planted, this knotweed spread and refused to go away. Beyond the Far East, its homeland, Japanese knotweed has no natural biological enemies to check its spread. On the other hand, in Japan, at least 30 species of insect and 6 species of fungi live on the plant and restrict its spread. In 2004, a UK government review of non-native species stated the costs involved in eradication would be at least GBP1.56bn. Some other ecology-related photographs: .

Japanese Knotweed along side of Hollandsche IJssel dike as invasive exotic species in Nieuwerkerk aan den IJssel the Netherlands

This lovely flowering plant featuring bushy white blossoms, are considered by many in the United States and an invasive species and a pest.

Japanese Knotweed resp.Fallopia japonica at River Wupper ,Bergisches Land,Germany

Invasive plant Parkslide with flowers

Japanese knotweed branch with flower buds - Latin name - Fallopia japonica

Buckwheat crop plant (Fagopyrum esculentum)

Fallopia japonica or Japanese knotweed. Branch with green leaves and white flowers

A clump of Japanese Knotweed (Reynoutria japonica, aka Fallopia japonica, aka Polygonum cuspidatum), a highly invasive plant, growing at the side of the coastal road through Craighouse, Isle of Jura, Scotland. Copy space at the bottom of the image, or this could be cropped off.

Plant growing wild in the Netherlands

Soil, fully covered by wild grape - an invasive plant in Kissena Park, Queens, NYC.

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