So, 6 years ago, we were walking past the abandoned farm yard next door and saw some pretty purple flowers. Paul went to pick some for me and came back with an entire plant. When we got home, he stuck it in the freshly tilled dirt around our new maples. We then forgot about it. It has thrived! Does anyone know what it is? The leaves are long and narrow and a bluish kind of green and the individual flowers are 1-2" across. It seems to be a perennial as well as self seeding.