I could be wrong but I have always had three classifications, vegetables, fruits, and roots. Anything growing under the ground is a root. This includes all the ones you mentioned, including peanuts.
Admitted, I am not a botonist.
31 posted on 02/26/2012 2:40:32 PM PST by Just another Joe
(Warning: FReeping can be addictive and helpful to your mental health)