CHAPTER XXXIII 
PLANT SOCIETIES 
Plant associations. Plants which have congenial 
dispositions often grow together in harmony on the 
same territory. There is room for several different 
kinds, just as there is room for many small stones in 
the spaces between large stones in a pile. Moreover, 

FIG. 301. Peat-bog formation with heaths, cranberries, sedges, etc., growing on it, 
and all advancing to fill in the pond. 
several kinds of plants of the same size may have 
congenial dispositions toward each other, so that they 
can live peaceably together. No one of these kinds 
tries to cover all the ground. They are content with 
a spot here and there. At least they have not very 
pugnacious dispositions, nor are they so forward as to 
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