There are hundreds of sites on this topic.
Check out:

http://butterflywebsite.com/
http://www.uky.edu/Agriculture/Entom...misc/ef006.htm
http://hort.ifas.ufl.edu/ggk/butterfly.htm
http://www.floridagardener.com/butte...rflyplants.htm
http://www.geocities.com/aquatt93/butterfly.html