section of the upper portion of frond showing a fertile ramulus 

 bearing cystocarps and net-like structure, \ 2 . Fig. 9 : longitudinal 

 section of cystocarp, ? .*. Fig. 10 : portion of the neucleus with a 

 part of the central cell, 3 ^-. Fig. 11 : very young neucleus ; two 

 larger cells below the cell, c, just going to fuse to form the central 

 cell, ^. 



Ceratodictyon Zanardini 1878. 

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CERATODICTYON (SPHAEROCOCCACEAE). 

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