OF CBBTAOJSOns PLANTS. 



277 



1901. Cercospora coriococcnim, Bayer, in Fritsch & Bayer, Studien 

 bbhm. Kreidepfl., p. 66, text-fig. 2. 



The fungus forms roundish, sharply delineated patches, 

 generally distinct from each other but sometimes merging. 



Text-fig. 24. — Cercosporites cortococcus (Bayer), a. Leaflet of Dewalquea 

 coriacea coTered with the fungus, natural size. b. A small portion 

 enlarged twice to show the surface character of the fungal patches. 

 c. Portion of leaf of Hedera primordiaJis showing the same fungus. 

 After Bayer. 



These are 2-5 mm. in diameter, with a surface marked by 

 series of concentric striations ; in some cases the centre is 

 slightly depressed. These patches lie both on the leaf-lamina 

 and over the central nerve. 



