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A MANUAL OF THE PENICILLIA 



heavy sporing throughout except for a white growing margin 3 to 5 mm. 

 wide, in gray-green shades near gnaphahum green (Ridgway, PL XLVII) 

 becoming ohve-gray in age; reverse black or nearly so except for narrow 

 marginal zone; sclerotia abundantly produced, forming an almost continu- 



C . u 



I'lG. 1G7. Penicillium novae-zaiaitdiav v. lieyma, NRRL 2128. A and B, Two- 

 week-old colonies on Czapek and malt agars; abundant sclerotia appear as darkened 

 areas, particularly along inter-colony margins. C, Black sclerotia, largely embedded 

 in the substratum — in this preparation superficial aerial growth has been pushed 

 aside, X 22. D, Penicilli as seen at the colony margin under low power, X 80. E, 

 Penicillus showing symmetrical pattern and rough-walled conidiophore, X 750. 



ous coriaceous mass in the surface of the substratum throughout most of the 

 colony area; conidial structures as on Czapek, 



Colonies on malt extract agar spreading, 6.0 to 6.5 cm. in 12 to 14 days, 

 with general texture as on steep agar but usually thinner, heavier sporing 

 but in the same shades; sclerotia abundantly produced (fig. 166B), and 

 concentrated along radial lines near the surface of the substratum ; conidial 



