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Thistles are one of many invasive plants in the Hawaiian Islands.  This image was taken on Moloka’i, where the plant has aggressively taken over former grazing land.  This plant is sharp from ground to tip, and will easily pierce clothing and skin.  The seeds are carried readily on the wind, and in an area that sits in the trade winds (as the Hawaiian Islands do) this is a real problem.

Sadly, this is just one of many plant and animal species that is causing problems in the islands.



  1. Thanks for the good info.

    Sent from my iPhone


    • You’re welcome, FBD.

      You’ve got your own share of invasive species problems in Florida: kudzu, water hyacinth, pythons…

      Hmmm, maybe bull thistles aren’t so bad… 😉

      RPRT photo

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