MEXICAN WALNUT (_Juglans rupestris_) will never amount to much as a timber tree, though it is by no means useless. It is known by several names, among them being western walnut, dwarf walnut, little walnut, and California walnut. The last name is applied in Arizona through a misunderstanding of the tree’s identity. It is there confused with the California walnut which is a different species. The Mexican walnut’s range extends from central Texas, through New Mexico to Arizona, and southward into Mexico. It prefers the limestone banks of streams in Texas where it is usually shrubby, seldom attaining a height above thirty feet. It reaches its largest size in canyons among the mountains of New Mexico and Arizona where it reaches a height of sixty feet. Trunks are sometimes five feet in diameter. The wood weighs 40.85 pounds per cubic foot, is dark in color, but the tone is not as regular as that of black walnut; neither is it as strong and stiff. It polishes well, and is said to be durable in contact with the soil. It finds its way in small amounts to local mills, shops, and factories where it is made into various commodities. It is particularly liked for the lathe, and is suited better for turnery than for any other purpose. It is made into gavels, cups, spindles, parts of grills; and it is also worked into picture frames, handles, and small pieces of furniture. It does not appear that lumber sawed from this walnut ever gets into the general market, but the whole output, which is small, is consumed locally. Trees do not occur in pure stands and the whole supply consists of isolated trees or small groups, with few trunks large enough for sawlogs. The nuts are dwarfs. All are not the same size, but none are as large as a hickory nut. Many that grow on the diminutive trees along the water courses in western Texas are not as large, husks and all, as a nutmeg, and the nut itself is about half the size of a nutmeg, and not dissimilar in appearance. The kernels of such a nut are too small to have any commercial value, but they are rare morsels for the native Mexicans and Indians who pick them by pocketfuls. Trees in the stony canyon of Devil’s river, in Texas, are in full bearing when so small that a man can stand on the ground and pick walnuts from their highest branches. The Mexican walnut is occasionally cultivated in the eastern part of the United States and in Europe. It is hardy as far north as Massachusetts.