PAPERS OX BIOLOGY AND AGRICULTURE 



159 



roadsides, in open pastures or half-wooded hillsides, this 

 plant seems to be at home. ' ' There would be no difficulty 

 in enumerating locations in Illinois which would duplicate 

 each item of Kern's heterogeneous list. Yet, in Illinois, 

 there seems to be a consistent relation which may be 

 pointed out as existing between naturalized plantings and 

 the locations they occupy. 



This relation is not to be seen in any consideration, 

 individually, of our many escaped plantings; but it is 

 apparent in a complete grouping of them all in relation 

 to the dominant features of the habitat in which they are 

 found to occur. • 



Map 9. Territory surrounding Gurnee. Lake County. 



