CLADOSPORIUM HERBARUM. 



221 



10. Cladosporium herbarum (Fig. 46). 



This mould occurs along with others in fermentable liquids r 

 in the fermenting rooms, and also on hops, malt, etc. It 

 sometimes occurs in very large quantities in the fermenting 

 rooms. The author found, in one case, that the ceiling and 

 a portion of the walls in a bottom-fermentation room were 

 thickly covered with small black patches ; these consisted 

 of Cladosporium, the conidia of which were consequently always- 

 present in the yeast. The plant consists of a yellowish-brown- 

 mycelium with short, straight 

 filaments, stiff and brittle ; those 

 growing erect can produce at 

 their upper extremities conidia 

 of very varying form spherical, 

 oval, or cylindrical, straight or 

 curved. In contrast to Peni- 

 cillium, where the new conidia 

 are formed basi-petally (i.e., 

 below those which have already 

 been cut off), they rise, in the case 

 of Cladosporium, either apical or 

 lateral, from a kind of budding 

 of the mother conidium, the 

 development being thus basi- 

 fugal. The name Cladosporium 

 herbarum doubtless includes 

 several closely related species. 

 According to Janszewski's re- 

 searches, the same species can appear in different forms and 

 with a varying size of cell. He showed that the commonly 

 occurring species represents a stage in the development of 

 an Ascomycete (Mycosphcerella}, the perithecia of which bear 

 some resemblance to those of Aspergillus. 



Wortmann includes Cladosporium amongst those fungi, the 

 mycelium of which, growing through the corks of wine bottles, 

 give rise to the corked flavour of wine. These and other 

 species of fungi occur during the ripening of cheese which r 



Fig. 46. Cladosporium herbarum. 

 Conidia-forming hyphte (Loew) and Conidia 

 (Holm). 



