There’s polygonum perfoliatum ... pests and animals across continents is driving native species to extinction and costing the world more than $423 billion a year, according to a recent U.N ...

The Japanese knotweed (Polygonum cuspidatum); Perilla mint ... Invasive plants are plant species that are not native to its environment, are introduced by humans, whether intentional or not ...

The knotweed, known as Polygonum molle (Sikkim knotweed), which ... said the knotweed was among 27 different species of invasive flora identified by them to pose a threat to native landscapes ...