Bui. 380, U. S. Dept. of Agriculture. 



Plate XIII 



i*^**^ 



/s. 



' \ 



/ v , *> 



\ 







« r**v 



2 /# 



$f& m^t -. 



#•- 







4>. 





Endothia singularis. Vertical Section of the Major Part of a Pycnidial 



Stroma. X 32. 



Paraffin section stained with Bismarck brown. 



