VegetatioNAI. Map of Illinois. The boundaries of the principal geooraphical 

 divisions of the state are indicated by sohd hnes, and their subdivisions by broken lines. 

 Shading, as shown in the key, indicates approximately the areas that formerly were 

 forested. (Reproduced by permission from A. G. Vestal's map of 1930, which was 

 based on C. J. Telford's map in Illinois Nat. Hist. Surv. Bull. vol. 16. 1926). 



