thistle рдХреНрдпрд╛ рд╣реИрдВ? thistle рдХреНрдпрд╛ рд╣реИрдВ? Any of numerous weedy plants, chiefly of the genera Cirsium, Carduus, or Onopordum of the composite family, having prickly leaves and variously colored flower heads surrounded by prickly bracts.Any of various similar or related plants.