GRA3SES OF IOWA. 



grass flora of Dickinson county is not unlike that of Story or Dubuque 

 counties. On the high prairies of the former county Andropogon scopa- 

 rius.A. provinciate j Ely mus robustus,Panicum Scribnerianum and Sporo- 

 bolus heterolepis abound. However, the Sporobolus cuspidatus and 

 Elymus Canadensis are conspicuous features of the gravelly hills, and 

 hills and knolls of Dickinson countv. 



8.5 



a,* 



O V 



s -5 

 5.8 



e8 £ 

 > § 



The altitude of the Missouri river basin is not far from IOOO feet. 

 It is somewhat less on the immediate shore lines of the Missouri, and 

 more than this toward the interior and northward. The following alti- 

 tudes are taken from the Iowa Geological Survey 1 and Gannett's table 

 of altitudes: 



1. Bain, H. F. , Geology of Woodbury county, la. Geol. 8urv. 8: 320. 



