8 BULLETIN 909, IT. S. DEPARTMENT OF AGRICULTURE. 
The region throughout which black walnut is found in sufficient 
quantities for commercial exploitation is much more restricted (fig. 
2). This region excludes the following areas embraced within its 
botanical range: Practically all of New York; the greater part of 
Pennsylvania, chiefly the mountainous and the northern portion; 
nearly all of New Jersey and Delaware; all but the central part of 
Maryland; southeastern Virginia, all but the western portion of 
North Carolina, and the regions of relatively high altitude in those 
LE.GZNQ 
Primary Commercial Range 
^<S\ Secohdary Co'mmercnl Range 
Fig. 2. — The area of primary commercial importance indicates in a general way where 
walnut is found in comparatively large quantities. The area of secondary commercial 
importance includes the region where it generally occurs in quantities large enough for 
commercial exploitation. 
States (as also of West Virginia) ; practically all of the area in- 
cluded in the other Atlantic and Gulf States; southern Arkansas, 
and parts of other States on the border of its botanical range. 
Throughout the commercial range indicated walnut is, of course,, 
not everywhere found, as, for instance, on barren soils, the high 
ridges of Tennessee and North Carolina, and the low bottom lands. 
On the other hand, in the montainous sections of Virginia and West 
Virginia, where it is shown to be unimportant, many rich coves and 
fertile valleys contain profitable stands of excellent walnut timber. 
