Here is a picture of a castor bean from Wikipedia.  Read more here:  http://en.wikipedia.org/wiki/Castor_oil_plant

This is a castor bean.  They grow to be very large and come in various shadings of color, according to the color of the bean planted. This plant is the source of castor oil.  Be careful with it:  the beans are poisonous!  They contain ricin, a poison, which is also present in lower concentrations throughout the plant. ...