194 A NATURALIST IN THE GREAT LAKES REGION 



The third type of swamp found in the dune region is the 

 sphagnum bog with its associated border of tamaracks (Fig. 

 226). It is one of the most striking associa- 

 tions of plants and animals to be found in the 



FIG. 229 Fio. 230 



FIGS. 229, 230: Fig. 229. The orchis, Arethusa bulbosa; details of blossom at 

 right. Drawing by L. N. Johnson; Fig. 230. The bearded orchis or grass pink, 

 Calapogon pulchellus. Drawing by L. N. Johnson. 



