Home >> Science >> Biology >> Flora and Fauna >> Plantae >> Magnoliophyta >> Magnoliopsida >> Polygonaceae >> Polygonum >> Polygonum cuspidatum Polygonum cuspidatum - Japanese Knotweed Image, description, and invasiveness. Japanese Knotweed Alliance Information on the problem of Japanese knotweed and the concept of natural (biological) control using FAQs, links and updates.
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