Cultigen Info Wanted

[Shirley I. Greenwood]

I can only find a dictionary term for *cultigen* which states that it is 
*a plant assumed to have originated in cultivation, and unknown as a wild 
plant.  Cabbage and cauliflower are cultigens, as well as many other garden 
plants.*

Does anyone have a known list of cultigens or anymore general information on 
the subject?  I'd appreciate some help on this.

tntsg at primenet.com