I have a problem with trees like this. Normally, it's a given that all the parts of a tree have been created by and under the same forces and circumstances. Winds blow from the one direction against the tree. All the parts of a squat tree are thick & squat. Tall & skinny are words that fit together logically, -two parts of one metaphor. So much for the physical side of the equation. The art size may be less restrained because viewers are all over the map. No nice way to say it. But, if the eye of the beholder shoots around like a pinball from strong interest point to other strong points, especially when several are present, and the eye can't glide naturally along a clear, logically occurring path, then it's awful hard see a "design", authored by man or nature. IMHO. If it's hard to name, it's probably too far afield.