JUGLANS RUPESTRIS, Engelmann. Texas Walnut. New Mexico Walnut.--Leaflets thirteen to twenty-five, smooth, bright green, small, narrow, and long-pointed; male catkins short, or about two inches long, and quite slender; fruit round or oblate; husk thin, nearly smooth; nut small, one-half to three-fourths of an inch in diameter; shell very thick, rather deeply furrowed, the narrow grooves on the greater part continuous from base to apex, the broad edges of the ridges smooth, not jagged as in the butternut and black walnut. Kernel sweet and good, but so small (Fig. 84) as not to be worth the trouble of extracting. A small and neat tree twenty to forty feet high, native of the bottom lands of the Colorado in Texas, and throughout the western part of the State, extending through southern and central New Mexico to Arizona. In New Mexico it reaches an elevation of seven or eight thousand feet, though the climate is often severe, the temperature dropping to zero and below during the winter. Seedlings raised from nuts obtained near the northern limits of this species in Texas and New Mexico would probably be hardy in most of the Northern States, but they are scarcely worth cultivating for their nuts, owing to the small size and thick shell; but as the trees are neat and graceful they are worthy of a place among other useful and ornamental kinds. An occasional bearing tree of this Texas walnut may be seen in the gardens and parks of the Eastern States, and probably in some of the Western, but I have no direct information in regard to their locations or age. Synonyms: _Juglans rupestris_, Torrey. _Juglans Californica_, Watson, Bot. California.