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A MANUAL OF THE PENICILLIA 



coming zonate in marginal area with the development of conidial struc- 

 tures, irregularly raised and commonly buckled and wrinkled in a cerebri- 

 form pattern especially in colony centers, with radial furrows extending to 

 the margins (fig. 83A), consisting of a fairly thin and brittle basal felt of 

 white to yellow mycelium near sea foam yellow or sea foam green (Ridg- 

 way, PI. XXXI), with surface growth close-textured or, in some strains, 



Fig. 83. A and B, Penicillium miczynskii Zaleski, NRRL 1077, on Czapek and malt 

 agars at two weeks. C and D, P. godleivskii Zaleski, NRRL 2111, on same media, 

 same age. 



becoming floccose at the colony margins, conidial structures sparingly 

 produced over the entire colony surface but occasionally more concentrated 

 in a narrow marginal zone, in gray-green shades near mineral gray or gna- 

 phalium green (R., PI. XLVII); exudate fairly abundant, in small drop- 

 lets, clear or in pale yellow shades; odor faint; reverse bright yellow to 

 yellow-orange with surrounding agar colored in lighter tints of the same 



