An Ecological Study of Buckeye Lake. 83 



and other sun-loving plants find a congenial environment. The 

 remains of large Burdocks and large Rubus nigrobaccus canes 

 are frequent. There are scarcely any grasses in this central 

 area, and as it has been mowed and burned, all the herbage is 

 scanty. 



On the northwest margin of the transect, the forest associa- 

 tion is followed immediately by the marsh or shore association. 

 The swamp shrub association is wanting. The marsh associa- 

 tion is represented by three societies : 



8. Hibiscus moscheutos society 



9. Polygonum-Scirpus society and 



10. Scirpus lacustris society. None of which show the 

 development of the marsh zones on the south side. 



8. Hibiscus society 



Principal species : 



Hibiscus moscheutos 



Secondary species : 



Hypericum mutilum Bidens cernua 



Impatiens biflora Xanthium canadense 



Hedeoma pulegioides Rosa Carolina 

 Echinochloa walteri 



The society forms a narrow, interrupted border not more 

 than four feet wide, of mature fruiting but not tall Hibiscus 

 moscheutos. Of the secondary species the Hypericum is quite 

 abundant at the outer margin of the eastern portion of the zone. 

 The other species are very sparse, of the Xanthium and Rosa 

 there is but a single plant. 



9. Polygonum-Scirpus society 



Principal species : 

 Polygonum emersum Scirpus fluviatilis 



