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Reynoutria japonica in bloom

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

Shot of white blossoming small flowers. Koenigia Alpina.

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.

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

Creeper - an invasive plant, spreading on the ground of Kissena Park, Queens, New York.

Close up view of the invasive perennial plant Japanese knotweed or Fallopia Japonica

Blooming young green leaf on a tree branch with blurry background macro shot spring

Wild flower in the field

Japanese Knotweed plant is very invasive and difficult to eradicate.

white inflorescence of Reynoutria japonica shrub

A clump of Japanese Knotweed, Fallopia japonica, aka Reynoutria japonica, aka Polygonum cuspidatum ,a plant species which is extremely invasive in the UK.

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

chinese medicine plant Achyranthes aspera L. in outdoor in Spring

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

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

Plant growing wild in the Netherlands

Japanese Knotweed

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

A young creeper plant isolated on white.

Inflorescences of the weed plant Reynoutria japonica in the summer forest. Invasive species in Germany

The first true leaves of a runner bean seedling,

Sendai City Aobayama

Tamarix Tetrandra plant with water drops on it. Natural spring background.

Blooming Sakhalin Knotweed or Fallopia sachalinensis in summer

Japanese Knotweed is a noxious invasive weed and is difficult to eradicate. It is a danger to building structures.

Plant growing in a garden in Germany

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: .

Blooming Giant Knotweed plant on a black background

The view from a hiking trail in the forest (or woods) of a Nordic Country (Norway) on a sunny day during summer (late August). The image is part of a series of Nordic hiking trail summer images. The image was captured at low ISO with a fast prime short telephoto/macro 105mm lens at f/2.8 and a full-frame mirrorless digital camera resulting in a large clean file suitable for large prints. Shallow depth-of-field (DOF) allows for ample copy space.

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