PLATE 40. 



Dothideaceae. 



u 



u 



io-. 1. Dotlridea Montaniensis, E. & E. several stromata somewhat 



o 



enlarged, on bark of Bigelovia ? 



2. Vertical section of a stroma. 



3. An ascus. 



4. A sporidium. 



5. Phyllachora graminis, (Pers.) somewhat enlarged, on leaf 



of grass. 



6. Vertical section of the same. 



7. An ascus. 



8. A sporidium. 



9. Homostegia Kelseyi, E. & E. somewhat enlarged on dead 



stem of Ribes rotundifolium. 



" 10. Vertical section through a stroma. 

 '' 11. An ascus. 

 " 12. Two sporidia. 



13. Rhopographns filicinus, (Fr.), somewhat enlarged, on 



Pteris aquilina. 



14. Vertical section of the same. 

 " 15. An ascus. 



16. Two sporidia. 



