Plant Studio

it may be useful to some here and now its free. Check it out.

http://www.kurtz-fernhout.com/order.htm

fantastic looking plants, altough not very useful for game content since it uses highpoly meshbased plants. Pretty cool anyway. Impressive gallery!

other links to plant software:

http://www.vterrain.org/Plants/plantsw.html

http://www.treemaker.nl/

http://membres.lycos.fr/treegenerator/