Thought I might ask for a little help to start here. I was looking to clear space in my small garden and wondered what these three plants were before I did anything. I've no idea.
First is white and cottony - 2 pics


this has a nice flower

and this has been left in lots of places by the last tenants. Rooty with thin leaves. Picture's at a funny angle. I think it's related to some house plants?

I pretty much know what the rest is. Any help would be great. If you think I should ask again somewhere else, do say. Don't know my way around here yet, but looks like a great forum.