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A MANUAL OF THE PENICILLIA 



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D 



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X 



Fig. 100. Penicillium oxalicum Currie and Thom. -4 and B, Ten-day old colonies 

 of a typical, heavy-sporing strain, NRRL 2139, growing on Czapek and steep agars. 

 C, Same culture as shown in A, but after petri dish has been jarred, breaking the 

 heavy crusts of conidia that characterize this species. D, Slightly enlarged area 

 showing dislodged masses of conidia, X 6. E, NRRL 787 (type strain— see text) on 

 Czapek. F, NRRL 790, on Czapek, characterized by strongly wrinkled colonies. 



