196 



A MANUAL OF THE ASPERGILLI 



Fig. 56. Aspergillus terreus. A, Colony margin of a typical strain, NRRL No. 

 265, showing crowded, long columnar heads, X 14. B, Scattered but typical conidial 

 heads of an ultra-violet light-produced mutation unable to utilize NO3 nitrogen, 

 X 50. Both cultures on Czapek's solution agar, 2 weeks. 



