74 TENTH ANNUAL REPORT. 
2. Species peculiar and characteristic of the different 
regions. 
3. Societies characteristic of the regions. 
4. Conditions and factors which produce the plant 
regions determined. 
5. Map of the state showing boundaries of the plant 
regions and districts. 
XIll, LOCALITIES AND DISTRICTS OF SPECIAL INTEREST. 
1. General character of the vegetation of the counties. 
2. Investigations on special districts as Big Spring 
Prairie, Licking Reservoir, Cedar Swamp, Cedar Point, 
Sandusky bay, ete. 
XIV. PLANT WANDERINGS AND MIGRATIONS. 
I. Sources of the Ohio flora in time and space. In- 
fluence of the glacial epoch. 
2. Immigrants and waifs. 
3. Naturalized plants. 
4. Native plants disappearing. 
XV. GENETIC DEVELOPMENT OF PLANT SOCIETIES. 
1. The development of societies in relation to the 
physiographic changes in time, including the birth, life, 
and death of plant societies. 
2. The conflict or struggle between plant societies. 
3. Transformations due to the changed physiography 
and land surface produced by man. 
