132 Bulletin 313 



Cercospora canescens E. & M. — On the leaves of garden beans. 

 Causes broad, irregular brown spots with yellov/ish-brown borders; 

 conidiophores brown; conidia hyaline, cylindric-clavate, 5-many 

 septate, 1 1 7 x 6 /x. 



788. Conidia, 1/12. 



Cercospora cercidicola Ell. — On the leaves of the American red 

 bud (Cercis canadensis). Causes spots with dark, raised margins 

 which are dull gray above and rusty brown below. Conidiophores 

 fasciculate, brown, wavy, multi-septate, 90-114 x 3.5-4 /x; conidia 

 clavate, 3-septate, 30-40 x 4-7 //,. 



789. Infected leaf of Cercis canadensis. 790. Conidiophores, 1/12. 791. 

 Conidia, 1/12. 



Cercospora chionanthi E. & E. — On the fruit of Chionanthus 

 virginica. Also reported on the leaves. Causes a rotting and 

 shrivelHng of the fruit and spotting of the leaves. Conidiophores 

 fasciculate, brown, septate, geniculate at distal end or somewhat 

 wavy, 75-150 x 3.5-5 fi; conidia fusoid or club-shaped, dark at ma- 

 turity 3-5 septate, 30-60 x 4.4-5 /*. 



792. Infected fruits of Chionanthus virginica. 793. Conidiophores, 1/12. 

 '^94. Conidia, 1/12. 



Cercospora citrullina Cke. — On citron leaves. Causes numer- 

 ous circular, brown spots 2-4 mm. in diameter with purple borders. 

 Conidiophores on upper surface of leaf, long, pale olivaceous ; coni- 

 dia long, tapering, multi-septate (Saccardo says "sparsely septate")., 

 hyaline, 120-140 x 3 ^i. 



795. Conidia, 1/12. 



