(Juglans migra). The nut meat is difficult to obtain because of the hull which consists of a thick fleshy outer skin. The shell contains an oil that stains the hands and a tough inner shell difficult to crack. Desirable because of its strong pleasant flavor in cakes and cookies. Now regarded as one of our most valuable trees it was popular for making fine furniture in the early days in Ohio. Because the trees were often tall with strong, hard wood, walnut was used for structural timber in houses, barns and mills.