46 



A MANUAL OF THE ASPERGILLI 



Fig. 12. Influence of temperature upon growth and sporulation in Aspergillus 

 medius, NRRL No. 124, and Aspergillus janus, NRRL No. 1787. A , B, and C, Asper- 

 gillus medius, 17 days at 12° C, 20° to 22° C, and30° C, respectively ; note maximum 

 growth and limited sporulation at 20° to 22° C. D, E, and F, Aspergillus janus, 3 

 weeks at 20° C, 24° to 25° C, and 30° C, respectively; note evidence of white heads 

 only at 20° C, abundance of white and presence of green heads at 24° to 25° C, and 

 green heads only at 30° C. Temperature is the only variable. 



