I saw this tree in a post by Irma Lila Zentle, from Ibero Puebla. Like a problem tree, it uses the roots, trunk, branches metaphor, but interestingly here the trunk is made up of fears, the roots are commitments, and the branches and leaves are hopes and dreams.
So, less about analyzing a problem and more about collectively articulating fears, commitments and dreams. (Similar to the Love, Hate, Have, Need, Fear, Hope activity, but with commitment. It would be interesting to do a Love, Hate, Fear, Hope, Promise version, maybe two trees side by side?)