Crosnes. http://www.gourmetsleuth.com/crosne.htm >The plant is in the mint family but the edible part of the plant are small white tubers. The tubers can be eaten raw as one might a Jeruseleum artichoke (no relation) or cooked like a potato or other starch. Does anybody have some experience in growing this root vegetable? It might be interesting to try if root stock is available. Durgan.