- vineofmultiflowerknotweedthetuberofmultiflowerknotweedInfact,thepsyllideatsknotweedexclusively.Thetraditionaldyestuffsaremainlyplantdyestuffsuchasindigoplantknotweedetcandmineraldyestuffiscinnabar.AccordingtoareportinBritain'sDailyMail,knotweed"gro...
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