378 



MYCOSPH^ERELLACE^E. 



the cells thicken, become filled with drops of fatty oil, and, 

 according to E. LAURENT (VI.), also store up glycogen. 



In practical fermentation, Cladosporium herbarum not in- 

 frequently makes its appearance as a source of damage, especially 

 on cereal grains and on malt that is stored in a damp place. 

 The hop plant, too, is occasionally infested and damaged by 

 Cladosporium herbarum, particularly in damp weather or when 

 the plants have been rendered susceptible to attack in con- 

 sequence of other influences. In this case the fungus appears 

 as an olive-green to brown growth on the under side of the 



FIG. 186. Cladosporium herbarum. 



Conidiophores showing the successive formation of conidia during continuous obser- 

 vation on grape-juice ; 7, commencement of constriction ; II, after 3 hours ; ///, 

 after a further 2^ hours ; IV, after 10^ hours longer ; V, after an additional 6 

 hours; VI, after a further z\ hours ; VI I, 3! hours later ; VIII, still later. Magn. 

 300. (After E. Loew.) 



leaves. The same fungus also seems to play some part in shed 

 mouldiness in tobacco ; and it is frequently noticeable in cellars. 

 For this reason it is by no means surprising to find that the 

 fungus penetrates the corks of wines that are stored in bottle, 

 and contributes to the production of corked flavour (see p. 322, 

 vol. ii.) in such wines, as a result of its musty metabolic products. 

 Particulars of this have been collected by J. WORTMANN (III.). 

 The fungus is also a frequent cause of damage in cheese dairies, 

 where it plays a part in the blackening of the cheese. 



The putrefaction of eggs is not always due to bacteria (see 

 p. 218, vol. i.), but frequently to Eumycetes, the most active of 

 these being Cladosporium herbarum, or, what is practically the 

 same thing, Hormodendron cladosporioides. As long ago as 1864 

 it was shown by MOSLER (II.) that uninjured eggs may be infected 

 from the outside by Penicillium glaucum and Mucor mucedo. 

 ZOPF (X.) stated that Montagne cultivated Dactytium oogenum 



