Plate XIL 



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1. Nelvimbo society, 



2. Polygonum-Nelumbo society, 



3. Polygonum-Nelumbo-Typha society, 



4. Polygonum-Typha-Bidens society, 



5. Hibiscus-Typha society, 



6. Shrub society. 



Fig. 27. — Map of Orchard Island, 

 legend of plant societies. 



7. Forest society, 



Hibiscus society, 

 Polj'gonum-Scirpus society. 

 Sedge society, 

 Beach without vegetation. 



