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Fig. 73. A and 5, Aspergillus parasiticus, NRRL No. 465: A, Colony on Czapeks' 

 solution agar showing heavy production of short-stalked conidial structures, 10 

 days; B, Single conidial head showing single series of sterigmata and roughened 

 conidiophore, X 500. C-F , Aspergillus effusus, NRRL No. 506: C, Colony onCzapek's 

 solution agar showing characterisitc floccose habit and light sporulation, 10 days; 



D, Conidial structures arising from aerial hyphae characteristic of species, X 165; 



E, Single short-stalked fruiting structure arising from aerial hyphae, X 300; F, 

 Conidial head-Showing sterigmata mostly in two series, roughened surface of conidio- 

 phore not apparent, X 500. 



268 



