THE FUNGI WHICH CAUSE PLANT DISEASE 527 



Conidia not in chains 



Pycnidia on creeping hyphsB 2. Eurotiopsis. 



Pycnidia without mycelium 

 Conidia spiny or ciliate 



Conidia spiny 3. RoumeguerieUa. 



Conidia with several cilia at 



apex 4. Ciliospora. 



Conidia smooth 

 Pycnidia single-walled 

 Pycnidia more or less papil- 

 late 5. Zythia, p. 527. 



Pycnidia with crateriform 



ostiole 6. Libertiella. 



Pycnidia cup-shaped 7. Lemalis. 



Pycnidia with outer circum- 



scissile wall 8. Dichlsna. 



Pycnidia beaked 9. Sphsronemella. 



Pycnidia hairy or spiny 

 Pycnidia densely beset with conoid 



1-celled setae 10. Muricularia. 



Pycnidia with slender bristles or hairs 



Hairs fasciculate 11. Collacystis. 



Hairs separate 

 Hairs everywhere but at the apex 12. Chaetozythia. 

 Hairs only around the wide ostiole 13. Pseudozythia. 

 Pycnidia cespitose or in a stroma 

 Pycnidia cespitose, beaked; conidia in 



chains 14. Treleasiella. 



Pycnidia in a stroma 

 Stroma more or less pulvinate 



Conidia fusoid 15. Aschersonia. 



Conidia globose 16. MunMa. 



Stroma fruticose, branched; conidia 



bacillar 17. Hypocreodendron. 



Zythia Fries 



Pycnidia erumpent or superficial, globose, with more or less 

 evident papillate ostioles, white or bright colored; conidia ovate 

 or elongate. 



Some twenty species. 



