Multiflora Rose is a good plant gone bad. It was given to growers for planting in the hedge rows for game cover. It did not stay put, however. It spread rapidly by rootstocks into pastures and unplowed fields. The birds enjoyed the pulp of the fruit and then dropped the seeds to the ground under fences and hedges and power lines. It rapidly becomes so thick and vicious with barbs that nothing can penetrate. Except for bulldozers. They do an excellent job of removing the plant, roots and all.