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Water Fern

 
Water Fern covering a rhyne, Somerset Levels
 
 
Closer view
 
 
Fronds
 
 
Closer view of fronds
 
 
Close-up of frond with overlapping leaves
 
 
Rootlets
 
 
                                     
Large fern cells and chains of Anabaena cells
 
(the larger oval cells are heterocysts and the
 
smaller squarer ones are vegetative)
 
                                  
    
 Chains of Anabaena cells and a large fern 
 
    transfer cell       
 
 
 
Water Fern and Common Duckweed on the
 
         Lancaster Canal