The Fibonacci sequence is seen in tree branching. Like the rabbit genealogy, it takes two generation for a tree branch to bifurcate. This allows the tree to gain enough material before branching to ensure its strength. Another manifestation of the Fibonacci sequence in trees is by its growth rings The Fibonacci sequence is exhibited by this plant by counting the number of leaves sprouting at each level. Each level is differentiated from adjacent levels by observing the overlaps of the leaves.