PLATE 21. 



Me Ian omni eae. 



Fig. 1. Melanomma occidentale, .Ell. natural size on "sage brush." 



2. Fragment of same enlarged. 



3. Sectional view of a perithecium. 



4. An ascus. 



5. Two sporidia. 



6. Bombardia fasciculata, Fr. natural size on rotten wood. 



7. Same enlarged. 



8. Section of a perithecium more highly magnified. 



9. Three asci. 



" 10. Four sporidia, (A) mature, the others in various stages of 

 development. 



NOTE. Figures on this plate not drawn to any definite scale. 



