. 



UNTVFBSTTY 



HYPHOMYCETACEAE 439 



sparingly septate, straight, slightly tortuous upwards, 50- 

 70 x 4-5 /*, brown ; conidia acrogenous, narrowly obclavate, 

 4-5-septate, hyaline, ioo-i4oX 2*5-3 /*. 



Cercospora viticola, Sacc., Syll., iv., No. 2200. Spots 

 appearing on both surfaces of the leaf, subcircular or 

 irregular, 2-10 mm. diam., often numerous and growing 

 into each other ; hyphae often hypophyllous, in densely 

 fasciculate tufts, filiform, septate, 50-200X4-5 p, straight, 

 ochraceous, apex obtuse and obsoletely denticulate ; 

 conidia elongate-obclavate, narrowed upwards, 3-4-septate, 

 guttulate, 50-70 X 7-8 /*, ochraceous-olive. 



Cercospora beticola, Sacc., Fung. Yen., ser. v. p. 189. 

 Forming spots on both surfaces of the leaf; spots vague in 

 form, dry, 2-3 mm. or more across, often bordered with 

 red ; hyphae fasciculate, often continuous, cylindrical, 40- 

 50x4-5 /*, brownish, apex nodulose; conidia acicular, 70- 

 i2oX 3 p, densely and delicately septate, hyaline. 



Heterosporium, Klotzsch, Herb. Myc., i., No. 67 (1832). 

 Conidiophores fasciculate, simple or sparingly branched, 

 septate, often nodulose, olive-brown ; conidia solitary or in 

 chains of two or three, cylindric-oblong, 2-5-transversely 

 septate ; epispore minutely warted or granular, pale olive, 

 springing from the apex of the conidiophores. 



Growing on branches, twigs, and leaves ; often forming 

 blackish-olive, velvety patches. Helminthosporium only 

 differs from the present genus in the conidia having the 

 epispore smooth. 



Heterosporium echinulatum, Cke. Clusters small, often 

 numerous, seated on brown spots usually on the upper 



