Fig. 4. Spores of Penicillium as seen under the microscope. 
Fig. 4.6. (a) Erect hyphae bearing conidia (c) in chains. (b) Detached 
conidia. (s) Germinating conidia. (¢) Germ tube. (h) Mycelium. 
(Magnified.) (After Percival.) 
