Wood of Juglans regia, which is known in England as common walnut and in the USA as English walnut, was valued by cabinetmakers both for its hardness and for its dark brown veining. In the 16th and 17th centuries (i.e. before the advent of mahogany), most of the finest European furniture was made from walnut. The American species, Juglans nigra (black walnut), was long used for furniture in America, and from the 18th century was also exported to Europe; the Butternut, Juglans cinerea, which is also known as grey or white walnut, is sometimes used for American furniture.