238 



THE ASCOMYCETES 



Fig. 93. Morenoella qiierci?ja. A. Spermogonia and young ascocarps 

 formed on the mycelium occurring on the upper surface of oak leaves. 



B. A voung shield-shaped ascocarp, together with supporting mycelium. 



C. Cross-section of ascocarp, showing asci forming singly within the super- 

 ficial stroma. D. Mature two-celled ascospores. E. Mature spermogonium 

 bearing rod-shaped spermatia. The spermatiophores form a layer at the 

 base of the spermogonium. F. Spermatiophores and spermatia. G. Vertical 

 section of mature ascocarp. Ascocarp superficial, nutritive hyphae sub- 

 cuticular. (Courtesy of E. S. Luttrell.) 



