Very nice work. But as usual nature has been at it for four billion years and has beaten us to it. Fibonacci also comes to mind.
These same simple rules are used to generate the complex structures in your lungs and vascular system. They are most probably encoded in the 'junk' DNA that does not code for any thing yet.
see here some pictures of brocolli
http://fiveprime.org/hivemind/Tags/cauliflower,fractal
Bert