Another thing that’s crazy about trees is that there is no such thing as a tree, phylogenetically.

As in: there is no branch on the tree of life for trees. There is no first tree from which all trees are descended. There are trees that have a common ancestor that was definitely not a tree, and there are there are plants that are definitely not trees that are descended from trees.

If you look at the tree of life for plants, you see trees evolving into other types of plants and evolving back into trees all over the place.