430 PLANT DISEASES 



forming brown spots on the leaves, and light yellowish- 

 brown to black sunken spots on the petiole and stalk ; 

 spores irregularly oblong, hyaline, flesh-colour in the mass, 

 11-28x5 /*-; conidiophores colourless, cylindrical; setae 

 dark brown, abundant, once or twice septate, usually 

 colourless below, 60-109X3-5 /*. 



Colletotrichum gossypii, Southw., Journ. Myc., 1890, 

 p. 100, pi. iv. Sori orbicular, dark-coloured, or covered 

 with a pink powder ; acervuli erumpent ; conidia irregularly 

 oblong, usually with a lighter spot in the centre, often 

 acute at one end, colourless singly, flesh-coloured in mass ; 

 conidiophores colourless, varying in length, at least longer 

 than the mature spore, produced on a stroma ; setae single 

 or in tufts, dark brown at base, nearly colourless at the 

 apex. 



Cylindrosporium, Unger. Pustules or nuclei formed 

 under the epidermis, white or pallid, discoid or subeffused ; 

 conidia filiform, continuous, hyaline, often flexuous. 



Considered as conidial forms of species of Entyloma. 



Cylindrosporium chrysanthemi, Ellis and Dearn., Can. 

 Rec. Sci. t 1893, p. 271. Spots rather indefinite, i cm. 

 and more broad, becoming blackish ; pustules innate, on 

 both surfaces, 100-170 /x diam. ; conidia fusoid, almost 

 straight, 50-100X3-4*5 /*, at length escaping. 



Cylindrosporium padi, Karsten, Symb. Myc. Fenn.> 

 pt. xv. p. 159. Forming angular, brownish spots on both 

 sides of the leaf; pustules hypophyllous, covered by the 

 inflated epidermis; conidia filiform, flexuous, hyaline, 

 eventually appearing at the surface, 48-62 x 2 /*. 



Libertella, Desm. Acervuli or conidia masses of various 



