Flowering shrub in Duvall, Washington

Discussion in 'Plants: Identification' started by Tad Deshler, Aug 31, 2016.

  1. Tad Deshler

    Tad Deshler New Member

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    Seattle, WA
    I ran into a large patch (approximately 20 x 100 ft area) of this flowering shrub that I'm trying to identify. It's mixed up with some blackberry, but it does appear to be providing some habitat for honey bees. I'm trying to determine whether I want to remove it, but I'm not sure what it is. It's about 8 ft high.
     

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  2. Margot

    Margot Renowned Contributor 10 Years

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    That is almost certainly Japanese knotweed. There has been quite a bit of discussion lately about this terribly invasive plant on this Forum. There are several species and I can't say exactly which yours is. Look up Polygonum or Fallopia if you need a precise identification but the bottom line is that you do want to remove it and will have a hard job doing so.
     
    Last edited: Aug 31, 2016
  3. Silver surfer

    Silver surfer Generous Contributor 10 Years

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  4. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Actually not Japanese Knotweed, but its perhaps worse close relative Giant Knotweed Fallopia sachalinensis. Note the very long, and slightly crinkly leaves (smooth, and shorter, relatively broader leaves in Japanese).

    Info link: Fallopia sachalinensis
     

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