Japanese Knotweed or Fallopia japonica syn. Polygonum... - John Harris, J0610jk16.JPG

Japanese Knotweed or Fallopia japonica syn. Polygonum cuspidatum.Introduced into the UK as an ornamental plant in 1800s, it is Britain's most invasive non-native plant. - John Harris - 2006-10-07
 
 
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