Good evening. I have two large trees in my backyard, which I'm fairly certain are trees of heaven, but I want to be absolutely certain before I consider removal. The trees themselves are a bit over two feet in diameter, and maybe 40-50 feet high (rough estimate based on my house height). They both get thin, white columnar clusters of flowers in spring, although I forget if either of them drop seeds later in the season. I believe they do. I've included a photo of the flowers. I do get tree of heaven root suckers all over my property, sometimes all the way in the front yard, but my alley has several smaller trees of heaven, which I'm sure of, and I'm not sure if those are responsible. The smaller shoots smell characteristically bad, but when I break branches off of the largest two trees, they don't smell nearly as much. The second photo is of some of the tree's various characteristics. Thank you for the help!