190 
By referring to Professor Sargent’s volume upon the “ For- 
estry of the United States,” in the reports of the Tenth Census, 
we find that the pine in question ranges from the far West into 
the Rocky Mountain region, and that its easternmost station is 
given as the Black Hills of Dakota. We must now add north- 
ern and northwestern Nebraska to the region covered by it, with 
Long Pine Creek (Wasahancha) as its eastern limit. 
Much as I was surprised at the presence of the Rocky Moun- 
tain Pine in this locality, | was much more so at finding large 
trees of Black Walnut (Fuglans nigra) growing in the cafion by 
the side of the pines. The walnut is still very common, and was 
formerly so abundant that a good many thousand feet of walnut 
lumber were manufactured from the logs. The western range of 
the Black Walnut is given by Sargent as ‘‘ through southern 
Michigan to southern Minnesota, eastern Nebraska, and eastern 
Kansas.” I doubt whether there is any other place on the con- 
tinent where the Black Walnut and the Rocky Mountain Pine 
grow normally side by side. I could not trace the walnut fur- 
ther west, and have little doubt that this is its westernmost sta- 
tion, or very nearly so. It does not occur at Valentine, near 
Fort Niobrara, flfty miles to the westward. 
The Ironwood (Ostrya Virginica) was another surprise to me. 
At Long Pine it is very abundant, and so I found it at Valen- 
tine, and when a few days later I clambered through the cafons 
in the vicinity of Rapid City in the eastern Black Hills of Dakota, 
I still found it, although Sargent gives its entire limit as “ through 
eastern Iowa, southeastern Missouri, and Arkansas to eastern 
Kansas, the Indian Territory, and eastern Texas.” Coulter does 
not include it in the ‘‘ Rocky Mountain Botany.” 
The only oak in northwestern Nebraska appears to be the 
Bur-Oak (Quercus macrocarpa), and instead of being the normal 
form, it approaches the little Mountain Oak (Q. undulata). The 
trees at the eastern stations (Long Pine and Valentine) are fre- 
quently large, 30 to 50 fect high, but as we go west—Chadron, 
Fort Robinson and the Black Hills—they are smaller; in all 
cases, however, the cup is but little fringed, showing in this a 
strong tendency to the mountain species (Q, undulata). 
_The Choke Cherries, from Long Pine westward, are mostly | 
