I first saw this terrible plant (weed) in my mother-in-laws garden (Onaway, Michigan) We decided a bird dropped a seed and wolaa. Now several years later, I have pulling them out alot. My mom in law did start seeded plants for me and I wonder?? They have a very nasty, pickery stem (ouch) and hurts like HELL unless wearing good gloves. I can't say I ever saw a flower on them and some have gotten 3 feet high. I personally think it is a unwelcome WEED