ASYMMETKiOA-i!'ASCICULATA 



535 



Colonies on malt agar 2.5 to 3.0 cm. in 12 to 14 days, generally plane 

 (fig. 137C) with surface appearing granular and with marginal areas more 

 or less zonate; in some strains strongly fasciculate throughout, in others 

 with prominent fascicles produced abundantly only in the marginal areas, 

 and in occasional strains more or less floccose and showing only reduced 

 fasciculation ; penicilli essentially as on Czapek but generally more compact. 



T 



B 





D 



Fig. 137. Penicillium urticae Bainier, NRRL 989. A, B, and C, Ten-day old col- 

 onies on Czapek, steep, and malt agars, respectively. D, Single penicillus as seen 

 under 8 mm. objective, X 110. 



Species description based upon comparative cultural and microscopical 

 examination of many strains received or diagnosed as Penicillium urticae 

 Bainier, P . flexuosum Dale, or P. patulum Bainier. The following cultures 

 contained in the NRRL Collection may be regarded as representative: 

 NRRL 989, received from the Thom Collection as No. 4G40.455, as Bain- 

 ier's type of P. urticae; NRRL 994, from the Thom Collection as No. 



