88 PHYSICAL GEOGRAPHY. 



32. White Mulberry (M. alba?) This species is supposed to be 

 a foreigner introduced into the State. As I have some doubts 

 about this, I give it a place in this list. Have only found it on the 

 Missouri bluffs, southwest from Dakota City. 



33. Buttonwood (Platanus occidentalis?) Have found it only in 

 Cass, Otoe, Nemaha and Richardson Counties. Most abundant in 

 Otoe. The bottoms of the Missouri afford it a congenial home, 

 and here it flourishes. In some groves it has excluded most other 

 forms. 



34. Butternut (Juglans ctnerea.) Rare in Nebraska Know of 

 but one tree native to the State. This was first found by Simon 

 Baltzley, Esq., near Ionia, in Dixon County, on the Missouri bot- 

 tom, near the bluffs. 



35. Black Walnut (/". nigra.) On the whole the most valuable 

 of our native trees. It was formerly quite abundant in eastern 

 Nebraska. Owing to the high price of the lumber, millions of 

 feet have been shipped away, the bulk of it going to St. Louis. 

 In 1865 and 1866 a half million feet of lumber was taken from 

 Dakota County alone. In Dakota and Dixon Counties there are 

 yet some of these Black Walnuts standing, forty feet without a 

 limb, and from three to five feet in diameter. They are found on 

 the Republican, on the Loup, and on the Niobrara and Elkhorn. 

 When raised from the seed, and not transplanted, they are com- 

 paratively fast growing. One of the most desirable trees for cul- 

 tivation. 



36. Shell Bark Hickory (Carya alba?) Found, at long inter- 

 vals, in southeastern Nebraska, and still more rarely north of the 

 Platte. 



37. White-heart Hickory (C. fomentosa.) Have only seen a few 

 of this species, in Richardson and Nemaha Counties. 



38. Pignut Hickory (C. porcina.) Mostly in northeastern Ne- 

 braska, and on the Niobrara. 



39. Butternut Hickory (C amara.~) Our commonest species. 

 Have observed it sparingly in every county along the Missouri, 

 and also at long intervals on the Republican and Elkhorn. Often 

 these hickories only reach the dimensions of shrubs. 



40. Burr Oak ( Quercus macrocarpa.} Our most abundant spe- 

 cies of oak. Found all along the Missouri, on the Niobrara and 

 its tributaries, as far as to the iO2d meridian, on the Elkhorn, the 

 Upper Loups, on the Nemaha, Republican, etc. 



