An Ecological Study of Buckeye Lake. 53 



2. Oxycoccus-Sphagnum-Diilichium arundinaceum society: 

 (Fig. 19). Dulichium arundinaceum is an extremely widely dis- 

 seminated sedge, it is not only very abundant in the meadow 

 but also frequent in the thicket and bog-forest. It is clearly a 

 dominant species over noticeable areas of the meadow. The pro- 



FiG. 19. — Oxycoccus-Sphagnum-Dulichium arundinaceum society. In 

 the distance to the right Eryophorum virginicum, in the center and to the 

 left Osmunda cinnamomea with the strict habit tj^pical of this plant in 

 the open bog. 



minently three-angled stem thickly set with divergent leaves are 

 characters which clearly distinguish it from the other sedges. 



3. Oxycoccus-Sphagnum-Rynchospora alba society: — Ryn- 

 chospora alba favors parts of the meadow with high water level. 

 It is frequent in the wet paths and other shallow depressions of 

 the meadow. 



4. Oxycoccus-Sphagnum-Carex filiformis society: — To- 



