VEGETATION MANACEMF-JSJT — EGLER 



315 



Figure 4. — Map of the eastern United States, showing location of the research areas of the 

 Committee for Chemical Brush Control Recommendations, and its cooperating agencies. 

 (Drawn by W. Thayer Chase.) 



SIGNIFICANT PLANTS 



In the present state of knowledge it is difficult if not impossible to 

 summarize the data from the experimental areas and from my other 

 studies in terms of vegetation types or vegetation regions. On the 

 other hand, certain generalizations can be tentatively proposed for 

 species that are known to be regionally abundant. These will be 

 considered in the following four sections, dealing respectively with 

 trees, shrubs (including vines), forbs and ferns, and grasses. 



