Fig. 61. Aspergillus niger group: cultures growing upon Czapek's solution agar 

 at room temperature, 10 days. A, A. niger, NRRL No. 334, typical strain. B, A. 

 niger mut. schiemanni characterized by colonies light brown in color. C, A.foetidus, 

 NRRL No. 341, characterized by a yellowish vegetative mycelium and a strong 

 actinomyces-like odor. D, A . niger, NRRL No. 346, characterized by the production 

 of abundant sclerotia. E, A. phoenicis, NRRL No. 1956, characterized by long 

 uncrowded conidiophores. F, A. riolaceo-fuscus, NRRL No. 360, characterized by 

 compact, close-textured colonies and small heads with uniseriate sterigmata. 



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