Is it a weed?
I found a tuber/root in my new garden, (only been here a couple of years), when digging the border and lifted it and potted it to see what would grow.
I think it is nothing more than a weed, but I don't see any more growing anywhere in the surrounding area. Even if it's not a weed, it's not very nice plant anyway and will get the chuck.
Thanks for your help.