mame?
Since it is about half a meter high right now and I barely got the root ball into that pot, I don't think name is a possibility. Of course chop the whole thing down close to the ground may be the right thing. I just look at it and see literati. Maybe I need new glasses?
Another question is that all seven have pretty long distances between nodes which I assume is because they were all on the north side of the house and got very little sun? You can see that in the picture. The first one I dug up has leaves sprouting all over, which should be because it is on the south side and gets quite a bit more sun.