FOREST TREES AND SHRUBS. 89 



41. Var. Olivce formis, of the above, is found principally in 

 northeast Nebraska 



42. Post Oak ((?. obtusiloba.) Sparingly on the Elkhorn and 

 Niobrara. 



43. White Oak. Variety of. (Q. alba. Var. Gunnisonii.) 

 Rather abundant in some of the canyons leading into the middle 

 course of the Niobrara, also a few on the Upper Loup. Rare in 

 eastern Nebraska. 



44. Yellow Chestnut Oak (Q. primus. Var. acuminata.) South- 

 eastern Nebraska; occurs sparingly. 



45. Swamp White Oak (Q. bicolor.) Most abundant in tim- 

 bered bottoms and edge of bluffs, in northeast Nebraska and on 

 the Niobrara. More sparingly represented south of the Platte, in 

 the counties bordering on the Missouri. 



46. Yellow Chestnut Oak (Q. castanea.) Southeastern Ne- 

 braska. Sparingly on the upper Niobrara. 



47. Dwarf Chestnut Oak (Q. prinoides.) Though this is a 

 shrub, it in exceptional cases grows to the size of a small tree. 

 Eastern Nebraska, Elkhorn, Nemaha and the Niobrara. 



4S. Black Jack Oak (Q. nigra.) Occurs sparingly in south- 

 eastern Nebraska, and most abundantly in Richardson County. A 

 few in northeast Nebraska, on the Niobrara and Elkhorn. 



49. Scarlet Oak (Q. coccinea.) Occurs sparingly along the 

 Missouri, on the Nemaha, Elkhorn and Niobrara. 



50. Var. tinctoria of the above is a rarer form. I have obtained 

 it only from Otoe County, through Mr. Masters. 



31. Red Oak (Q. rubra.) Found on the Niobrara, Bazile, Mis- 

 souri, Elkhorn and the Nemaha, but nowhere in large quantities. 



52. Swamp or Pine Oak (Q. palustrus). Have only found it on 

 the Missouri bluffs and between north of the Platte and on the 

 Niobrara. 



53. Iron Wood (Carpinus Americana). Very sparingly repre- 

 sented in most of the eastern woodlands of the State. Most 

 abundant in Northeastern Nebraska. 



54. Paper Birch (Betula papyracea). Only occasionally repre- 

 sented along the wooded bluffs bordering the Missouri bottoms. 

 Found it once on the Niobrara, near the mouth of Rapid Creek. 



55. Red Birch (B. nigra). Rare in Nebraska. Found my first 

 and only specimen three years ago, on the timbered bluffs in 

 southern part of Dakota County. 



