GNOMONIACEAE 



221 



do not function in fertilization. Brooks suggested that instead 

 thev mav serve as respiratory channels. His evidence led him to 

 doubt that the ascogonia give rise to ascogenous hyphae. 



D 



E 











m00mm 



Mwm 



Fig. 86. Endothia parasitica. A. Diagrammatic section of pycnidial stroma. 

 B. Section of the inner wall of pycnidium, showing conidiophores and 

 conidia. C. Perithecial stroma of E. parasitica in section. D. Ascus of E. 

 parc.dtica. E. Ascospores. (A and C from Heald, B, D, and E from 



Anderson and Rankin.) 



x\scoCTonial coils in Gno7noma iilmea were observed by Miles 

 (1921) and Pomerleau (1938), but these workers did not account 

 for the manner in which the ascogonial cells become binucleate. 



