ELSINOEACEAE 



165 



archicarp in each of the thirty to fifty cupules on each stroma, 

 whereas in M. ciirtisii there are many in each archicarp. Miller 

 (1938) is uncertain whether antheridia are associated with the 

 coiled ascogones. 



Fig. 58. Pyrenophora tritici-repejitis. A. Perithecium in surface view, im- 

 mersed within tissues of wheat leaf. B. Mature ascus. C. Conidium of the 

 Helminthosporium stage. D. Germinating ascospore. E. Germinating 

 conidium. F. Conidiophores extending from the surface of leaf of wheat. 

 They may emerge through the stomata. (Adapted from Drechsler.) 



The morphological characteristics presented by the Myrian- 

 giaceae indicate that they should be placed close to the Aspergil- 

 lales. 



Elsixoeaceae. This family, also called Plectodiscellaceae, con- 

 tains several very important plant pathogens. Woroninchin 



