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. Rhopographus clavisporus, (C. & P.), an ascus. 



" 7. A sporidium. 



" 8. Didymosphaeria cupula, Ell. slightly enlarged, on petiole 

 and ribs of dead oak leaf. 



" 9. An ascus. 



" 10. A sporidium. 



" It. Ophiobolus 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. 



