42 ILLINOIS BIOLOGICAL MONOGRAPHS [208 



PLATE III 



Fig. 19. Spores. 



Figs. 20-23 UUodothis paspali. 

 Fig. 20. Section of a stroma showing four locules and the irregular stroma extending to the 



lower epidermis. 

 Fig. 21. Section of a uniloculate stroma. 

 Fig. 22. An ascus. 

 Fig. 23. Ascospores. 



Figs. 24r-27 Achordla guiancnsis. 

 Fig. 24. Diagram to show the relation of the locules to the stroma aad the hypostroma. 

 Fig. 25. A locule in stromatic tissue showing the dothideoid character. 

 Fig. 26. Detail of hypostroma as it occurs in the mesophyll. 



