FUNGI IMPERFECTI 



315 



Padi, but it is important as an almond tree disease 1 in California 

 and elsewhere. 



Cercospora Nicotianae E. & E. The more commonly observed 

 leaf spot or frog eye of the tobacco has been reported from many 

 tobacco-growing regions, but does not appear to be a disease of 



FIG. 148. CERCOSPORA CIRCUMSCISSA. (After Pierce) 

 a, tuberculate stroma ; b, conidiophores and conidia 



any great importance, and doubtless many different fungi are con- 

 cerned in the production of spots more or less similar which have 

 been reported in nonscientific literature. 



Cercospora Violae Sacc., producing white spots on leaves of the 

 violet in the spring, is common in coldframe or garden culture. 



Cercospora Diospyri Thiim. is of common occurrence in the south- 

 ern states on leaves and fruit of persimmon (Diospyros virginiand). 



Cercospora sordida Sacc. is the most important disease-produc- 

 ing fungus of the trumpet creeper (Tecoma radicans\ in the 

 United States. Pale spots are produced on the leaves, and defoli- 

 ation of the host often results by midsummer. 



1 Pierce, N. B. A Disease of Almond Trees. Journ. Myc. 7 : 66-77. ph. 11-14. 

 1892. 



