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A MANUAL OF THE PENICILLIA 



submarginal zones often more intensely yellow-orange in color; penicilli 

 fairly abundant in some strains, less abundant in others, but always more 

 concentrated in marginal than central colony areas, variable in size and in 

 complexity, strongly divaricate with conidial chains divergent and often 

 tangled in age, not tending to adhere into columns; conidiophores variable 

 in length, often arising as branches from aerial hyphae and rarely exceed- 



FiG. 82. A and B, Penicillium ochro-chloron Biourge, NRRL 927, on Czapek and 

 malt agars at two weeks. C and D, P. piscarium Westling, NRRL 1075, on same 

 media, same age. 



ing 100/i by 2 to 2.5ai, less commonly arising from the substratum, up to 

 300 to 500m in length by 2.0 to 2.5m or 3.0m in diameter, with walls finely 

 but conspicuously roughened; fruiting structures appearing variously 

 monoverticillate, irregularly and unequally branched, or occasionally 

 with fairly well defined terminal verticils of 2, 3, or 4 metulae, or branches, 

 but with the identity of such structures (whether metulae or branches) 



