WALNUTS 197 



heartnuts freely. Such being the case wild butter- 

 nuts may now be top-worked with kinds which have 

 immediate market value, leaving a few which bear 

 delicious nuts for home use. 



TEXAS AND ARIZONA WALNUTS 



The Texas walnut, Juglans rupestris, is found in 

 western Texas, New Mexico, and northern Mexico. 

 The Arizona walnut, Juglans major, is closely allied. 

 Curiously enough, these trees are hardy when car- 

 ried far north of their natural range, growing well 

 in Massachusetts. The nut is small and the shell 

 thick, but Professor E. O. Wooton, of the Agricul- 

 tural College of New Mexico, has sent me specimens 

 from the Mogollon Mountains which are larger and 

 thinner shelled than are most of the nuts of either 

 species. It is possible that these may belong to Jug- 

 lans major or to a species as yet undescribed, Con- 

 sideration is given to the Texas and Arizona walnuts 

 in these pages because the smaller tree, sometimes 

 nothing more than a bush, may serve as grafting 

 stock for dwarfing purposes in connection with other 

 species of walnuts. If this works out practically, 

 dwarf walnut trees of many kinds may be used for 

 intercropping purposes with larger walnuts to ad- 

 vantage. Dwarf trees are prone to bear heavily and 

 being small may be cut out as fast as they are en- 

 croached upon by the larger trees. Furthermore, 

 these walnuts will grow in arid regions where there 

 is very little rainfall. They may serve to carry valu- 



