282 



THE FUNGI WHICH CAUSE PLANT DISEASE 



Calosphseria. Tulasne (p. 281) 



Perithecia astromate, free or on the inner bark, scattered or 

 clustered, ostiole more or less elongate; asci clavate, fasciculate; 

 spores small, cylindric, curved, hyaline, continuous; paraphyses 

 longer than the asci, stout lanceolate, evanescent. 



About thirty-five species chiefly saprophytes. 



C. princeps Tul. 



Perithecia on the inner bark in orbicular or elliptic groups, gen- 

 erally densely crowded, globose, smooth and shining, necks long. 



Fig. 210.— Crypto- 

 sporella viticola. 

 Asci and pa- 

 raphyses. After 

 Shear. 



Fig. 211. — Calosphseria princeps. A, group of 

 perithecia; B, conidial stroma. After Tu- 

 lasne. 



decumbent, flexuose, cylindric, erumpent; asci 12-26 x 4 /i, 

 spores 5-6 x 1-5 ii. 



On plum, cherry, peach and even pomaceous trees. 



Melogranunataceae (p. 223) 



Stroma usually pulvinate, rarely effused, hemispheric, sub- 

 peridial then erumpent and more or less superficial; perithecia 

 sunken in the stroma; conidia occur in acervuli on the surface of 

 the young stromata, or in pycnidia. 



A small family of about one hundred twenty-five species, only 

 one genus of which contains important pathogens. 



