A new and distinct cultivar of black walnut tree (Juglans nigra L.) which is distinctly characterized by extremely rapid growth rate, excellent central stem tendency, and excellent straightness thereby producing good timber qualities. The culture has good resistance to anthracnose leaf disease. This new variety of black walnut trees was discovered by the applicant near South Raub, Tippecanoe County, Ind. in a black walnut planting from previously selected trees for outstanding timber production potential. This selection has been designated as BW510, a seedling progeny of unpatented BW95 in records maintained by the applicant on the performance of this selection, and grafts made from the selection and will be known henceforth as Beineke 13.