sunchokes

http://www.oikostreecrops.com/Perennial-Vegetables/Sunchokes/Supercluster--Sunchoke--/p-156-167-1104/

http://www.motherearthnews.com/organic-gardening/growing-jerusalem-artichokes-zmaz10onzraw.aspx?PageId=1#axzz3LjyRS4kE