There was an installation by the The Barbarian Group called Grass. This sounds like it is right up your street.
http://portfolio.barbariangroup.…
ill dig out some links for you but this is a good start
http://www.nooflat.nu/
http://www.hahakid.net/
http://www.robertpenner.com/
cheers they are all excellent, espacially that grass one
cheers
http://www.metaphorical.net/natu…
Anything to do with L-Systems
http://algorithmicbotany.org/