156 THE FUNGI WHICH CAUSE PLANT DISEASE 



Spores needle-like; paraphyses 



present 4. Coccophacidium. 



■ Apothecia elongate; opening by a 



slit 5. Clithris, p. 157. 



Spores elongate, miffiform, with pa- 

 raphyses 6. Pseudographis. 



Apothecia firmly united to the substratum . II. Phacidiese. 

 Apothecia separate, no stroma 

 Spores eUipsoid or globoid, 1 to 4-celled 

 Spores 1-celled 

 Apothecia rounded 



Paraphyses not forming an epi- 



thecium 7. Phacidium, p. 157. 



Paraphyses forming an epithe- 



cium 8. Trochila, p. 157. 



Apothecia irregular, elongate, 

 opening by an irregular 



mouth 9. Ciyptomyces, p. 158. 



Spores 2 to 4-celled 

 Spores hyaline 

 Apothecia rounded, spores 2 to 



4-celled 10. Sphseropeziza. 



Apothecia elongate, spores 



2-celled 11. Schizothyrium. 



Spores brown 12. Keithia. 



Spores filiform or needle-like, 1 to 



many-celled 13. Coccomyces. 



Apothecia collected on a stroma, opening 

 elongate 

 Spores 1-celled, hyaline 



Spores ovate 14. Pseudorh3rtisma. 



Spores filiform or needle-like 15. Rhytisma, p. 158. 



Spores 2-celled 



Spores hyaline 16. Marchalia. 



Spores brown 17. Cocconia. 



Dothiora Fries (p. 155) 



There are about ten wood-inhabiting species. Ascocarp at first 

 sunken in the substratum, later irregularly erumpent; disk black; 

 asci clavate, 8-spored; spores elongate or spindle-form, many- 



