This is a northern variety of bok choy that we purchased from a local farmer in New York State. It is very tasty, with a stronger mustard flavor in the green leaves than the store bought variety, which we understand comes from California. The thickened base part of the leaves has the same mild flavor of the California variety. In this variety the green color extends down to the base, where as the California variety is white at the base. This variety is great in soups and stir-fries. The only nutritional information we have for Bok Choy is for the California variety.