Thanks Natalie!
I really don't like to use Roundup except in the most extreme circumstances but this was one of those instances and I tried to figure out the least toxic way I possibly could do it. It had traveled underground 30' & was literally growing into the septic tank drain field.
When I bought the offending Clerodendrum there was nothing indicating it was an invasive in south Fl. which is where I was living at the time. I had spoken to many nurseries about it & nothing was ever mentioned about it's invasive nature.
Had I known I never would have planted it in the first place. I also did not have access to the internet at that time in order to research & find out just how nasty it could be. I am older & wiser now and hopefully will never make such a mistake again.