Thanks for the quick reply Pat, I was hoping you would see this and chime in. I dont know about the purple flowers in the summer, I only notice them this time of year because of the big clusters on the branches. I picked up a few logs that were pushed into a brushpile and they were extremely light and had huge growth rings so I didnt figure it was good bow wood. I guess if they are invasive I should cut all of them down that I can??