THE MOULD-FUNGI. 



87 



FIG. 18. 



Penicillium glaucum, after Brefeld and Zopf: A, conidiophore ; B, organs of 

 generation ; G, first development of the sclerotium (a, ascus-formirig 

 hyphse ; b, sterile filaments) ; D, very young sclerotium in section (a, 

 ascus-forming hyphae ; b, sterile portion of the sclerotinm ; m, myce- 

 lium) ; E and F, ascus-forming hyphse (a) with young asci (s) and 

 sterile mycelium threads (m) from a more developed sclerotium) ; G, 

 group of asci with spores ; H, spore ; /, germinating spores ; K, young 

 mycelium (with spore at x) ; A E (below), germination of a conidium, 

 after Zopf (more highly magnified) ; A, conidium before germination ; 

 B, it has thrown out a germ tube ; C, three germ tubes have been formed ; 



D, each germ tube shows towards the spore a transverse septum (.s) ; 



E, each germ tube has become divided by another septum (s'} into 

 a terminal cell () and an inner cell (6). 



