I tried guys!  I tried to find trees that were growing in natural patterns.  I had been looking for months and just could not find anything that made much sense.  SO, I decided to collect leaves from some of our native trees and create my own pattern using the bark of a tree as my background.  I think this was as close as I could get to using the word "tree" along with a pattern.  Maybe you have some trees in your life that stand out as a perfect tree pattern; if not, try what I did and collect some leaves from your native trees and show us what they look like in your neck of the woods.  From left to right, I believe I have a pattern of aspen, elm, maple, red oak, and repeat.