276 



A MANUAL OF THE PENICILLIA 



sporing in blue-green shades as on Czapek, adjacent sectors predomi- 

 nantly sclerotial and appearing light buff from the production of sclerotia 

 and increased sterile hyphae; reverse in golden to dull brown shades. 



J0'^^r^i' 



Fig. 73. Penicillium raistrichii Smith, NRRL 2039. A and B, Ten-day old col- 

 onios on Czapek and malt agars. C, Marginal area showing sclerotia and penicilli 

 intermixed, X 40. D, Detail of a single and unusually compact penicillus, X 1000. 



Cultural notes taken from the type strain isolated by George Smith 

 (catalogue No. 100) from moldy cotton yarn in the period between 1927 

 and 1929. The species is noteworthy for its free production of sclerotia as 

 pointed out by the describer, and also for its unusually rough-walled co- 

 nidiophores. The type culture is maintained in our collection as NRRL 

 1044, received from Smith in 1933, and as NRRL 2039, received more 



