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Closeup flowering beautiful NSW Christmas Bush, background with copy space, full frame horizontal composition

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

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: .

In summer, the perennial plant Reynoutria grows in nature

Weed Persicaria lapathifolia grows in a field among agricultural crops.

Spectacular Wild mountain flowers of Pin bhabha pass trail in Himalayas mountains in Himachal Pradesh, India

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

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

Close-up of lemon scented verbena flowers grown in a garden.

Buckwheat crop plant (Fagopyrum esculentum)

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

Flowering yarrow (Achillea millefolium). Pennine Alps. Piedmont. Italy.

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

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

Photo taken in September 2022 in the park of heights, a public park located next to the basilica of Fourvière. Lyons.

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

Closeup flowering beautiful NSW Christmas Bush in sunshine, background with copy space, full frame horizontal composition

Blooming Sakhalin Knotweed or Fallopia sachalinensis in autumn

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.

white inflorescence of Reynoutria japonica shrub

Field full of red blooming Knotweed or Persicaria amplexicaulis Atrosanguinea.

Asian knotweed (Fallopia japonica) a dangerous invasive species in many countries.

Prunus padus plant in bloom at Oslo, Norway. Bird cherry, hackberry, hagberry, or Mayday tree

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