I remember reading about L-Systems in Santa Fe Institutes publications in '90s. Just found this book below when searching for that - this looks comprehensive at

I remember reading about L-Systems in Santa Fe Institutes publications in '90s. Just found this book below when searching for that - this looks comprehensive at a glance: The Algorithmic Beauty of Plants, Prusinkiewicz & Lindenmayer, 2004 http://algorithmicbotany.org/papers/abop/abop.pdf http://algorithmicbotany.org/papers/abop/abop.pdf