PLATE 28. 



Pleosporeae. (except 6 & 7.). 



Fig. 1, Leptosphaeria Harknessiana, E. & E. natural size, on dead 

 stem of Frasera speciosa. 



2. Piece of the same moderately enlarged. 



3. Sectional view of a perithecium more highly magnified. 



4. An ascus. 



". 5. A sporidium. 



6. Rhopographns clavisporus, (C. A: P.), an ascus. 



7. A sporidium. 



8. Didymosphaeria cnpnla, Ell. slightly enlarged, on petiole 



and ribs of dead oak leaf. 



9. An ascus. 



10. A sporidium. 



11. Ophiobolns olivaceus, Ell. somewhat magnified, on dead 



herbaceous stem. 



12. An ascus. 



13. An enlarged sporidium. 



" 14. Pleospora aurea, Ell. somewhat magnified, on dead her- 

 baceous stem. 



" 15. An ascus. 

 " 16. A sporidium front view. 

 17. A sporidium side view. 



