Karen there is such a plant that was imported to the United States from Japan. It is an "Ivy" type plant. I forgot the name of it (Japanese ????Kudzu?). It was brought over for some kind of "weed control" or other similar property. It is NOT poisonous.
However, something went seriously wrong. The plant outgrew it's containment and is OUT of control. It takes over EVERYTHING and is nearly impossible to kill. You will see it pretty prevalent on the side of the road here in the South. It is spreading soo fast that nothing can be done. Entire forrested areas are covered in it choking the other plants and killing them.
I wouldn't recommend planting this stuff. It is a nightmare and may be illegal now to plant in other states. Certain plants are restricted believe it or not.