The following question was sent to the P&PDL diagnosticians here at Purdue University:
Question: I've heard there is a chocolate bush or shrub that has a chocolate fragrance. Have you ever heard of it?
Answer: The only plant that comes to mind (besides the cacoa plant that is the source for chocolate) is carob, Ceratonia siliqua. It is a semi-tropical tree, only would be hardy to Florida and Southern California. Carob is considered a chocolate substitute. Hope this helps.
-Rosie Lerner (May 5, 1999)