44 University of Michigan 



PLATE II 



Fig. I. Leather leaf bog invaded by tamaracks. Ontonagon River 

 nea r Cisco Lake. August 3, 1920. 



^*"*-^ ^ — Fig. 2. Arbor-vitae swamp four miles southeast of Little Girl's 

 Point. The ground is very moist. August 16, 1920. 



