What are Tuber Propagated Plants?
A. The term “tuber” is used in its narrow horticultural sense as meaning a short, thickened portion of an underground branch. It does not cover, for instance, bulbs, corns, stolons, and rhizomes. The only plants covered by the term “tuber propagated” in the Act (and therefore not patentable) are the Irish potato and the Jerusalem artichoke.