its a bit blurry, but its looks like its growing from a tuber, so possibly a dahlia?
Where did it come from? As that might give you a clue. Could also be a rhizome it’s growing from, but the leaf doesn’t look right for ginger or turmeric.
I really hope someone can help you @lewiscombey because I have these in my garden and it's driving me nuts trying to think of the name!I want to say balloon flower but I don't think they have 'bulbs' but that is what they look like in the autumn when they flower. Had my white ones for years, split them every so often to increase and fill the spaces where wildlife has pinched other bulbs!