Mystery Weed

Discussion in 'Plants: Identification' started by Jaime Verde, May 13, 2013.

  1. Jaime Verde

    Jaime Verde New Member

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    Location:
    Chicago, USA
    This plant started sprouting out of a Green Roof planting project in downtown chicago. You can see it crowding the sedum beneath. Some of the leaves seem to be slightly toothed. What is it?
     

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