ag TRANSEAU—BOGS OF THE HURON RIVER VALLEY 445 
meen, yellow, and red, depending upon the season of the year. 
Where the moss is disturbed by the uprooting of plants, the substra- 
tim becomes exceedingly dry. The moss dies out, and in place of 
ithere springs up a growth of Cladonia rangiferina, C. pyxidata, 
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Fic. 11.—Chelsea bog. 
C gracilis, C. verticillata, C. cristatella, and frequently @ small 
admixture of Rumex Acetosella. These plants gee 5 As the 
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~~ 4tea, driving out the lichens. About the borders 
