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TEXT-BOOK OF FUNGI 



in all known species except Erysiphe taurica, where they 

 are slightly branched. 



The conidial form of reproduction was at one time con- 

 sidered as an entity, and called Oidium. 



FIG. 72. Meliola, the superficial black mycelium forming 

 black patches on orange leaves. Nat. size. 



Later in the season the sexual ascigerous form of fruit is 

 formed on the superficial mycelium, in which it nestles 

 under the form of minute, yellowish balls, which become 

 black when mature. The perithecia bear specialised 

 hyphae which are often much branched or curled at the 

 tip. 



