LAKE TO FOREST OR PRAIRIE 



251 



animals. Indeed, the transition, as one goes from the oak- 

 hickory or the maple-beech forest to the adjoining prairie, 



Fig. 371. Brown-eyed Susans, Rudbeckia hirta 



is so abrupt, the new animals and plants 

 so strikingly dissimilar to those of the 

 forest, that even the casual observer must 

 be struck by the change. The contrast is 

 even enhanced by going through the 

 border of wild shrubs, hawthorn, trembling 

 asps, and sumacs, so characteristic at the 

 edge of the oak-hickory association with 

 the distinctive animal and plant life that 

 belongs to such a border. 



FIG. 372,-Coneflower, One of the most characteristic features 

 Brauneria purpurea. of the wet prairie or even of the upland 



