GENERAL INFORMATION 3 



termed the mycelium (Fig. i). This mycelium 

 then is nothing more than a network of hyphae 

 which, when a fungus has grown some time, is 

 visible to the naked eye, as seen in the grey covering 

 called mildew on turnips and other plants, and in 

 the white or ereen mould on bread and cheese. 



A 



B 



Fig. I.— (A) Conidiophore oi Penicillium glancum {c 2) highly magnified ; 

 (5. s.) sterigmata or spore-bearing branches ; [c i) conidia or spores ; 

 (B) portion of mycelium of PoticilHiun which has developed from the 

 spore (s) ; b.b.b. branches or hyphae ; notice the brush-like groups 

 of conidia. (After Brefeld.) 



The words hyphee and mycelium often form a 

 stumbling-block to students, and consequently the 

 following illustration is given with a view to making 

 them clearer. If we take a single thread drawn from 



T * 



