MICHIGAN ACADEMY OF SCIENCE. 



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Figure 11. Ecology of Crystal Lake Bar Region. 



Burned Area. The northern and central portion of the forested strip 

 has been burned, in some parts repeatedly, in others not so recently. 

 In the much burned portions the tree specimens are young and some- 

 what stunted. In the other portions the trees are larger and the under- 

 growth thicker. The species include Betula alba, Prunus virginiana, and 

 Prunus pennsylvanica, with the more xerophytic relics of the mesophytic 

 undergrowth, and much Pteris and Equisetum. 



