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Fig. 74. Cytology of Olpidiopsis vexans Barrett 

 A. Very young uninucleate thallus soon after establishment in host hypha. 

 B. Binucleate stage. C. Binucleated thallus with nuclei dividing, spindles 

 intranuclear. D. Somewhat older thallus, showing vacuolate cytoplasm and 



