OBSERVATION AND DESCRIPTION OF PENICILLIA 



53 





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D 



Fig. 13. Sclerotia in Penicillium raistrickii Smith. A, Low power view, X 55. 

 B, Enlarged view showing general contours, X 105. C, Single sclerotium crushed, 

 showing irregular manner of breaking. D, Enlarged view of small area showing de- 

 tail of the thick-walled cells which comprise the sclerotium, X 725. 



122), a species of the Fasciculata, and are occasionally seen in P. italicum, 

 the blue-mold rot of citrus fruit. 



A different type of sclerotium is produced in certain members of the 

 Biverticillata-Symmetrica, In Penicillium novae-zeelandiae, for example, 



