Plate LII. 



Fig-. 1. Heath near Beach, Illinois, jtoitj'fnis /lori^onia/is in the ioregrouaA. Back of a 

 strip of sand is bearherry {Aictostaphylos tiva-ursi) In the background is a tree of white pine 

 {Pinus strohits) and a grove of black o'ak {i^iiercus vehitina). August 24, 1900. 



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Fig. 2. Blowout in the heath, Zion City, Illinois. Revegetation mainly by heath plants. 

 September 4, 1909. 



