21G 



A MANUAL OF THE PENICILLIA 



phores arising mainly from trailing and branching hyphae, smooth-walled 

 mostly 50 to 100m by 1.6 to 2.2m but sometimes arising from the substratum 

 and longer, up to 150m; penicilli mostly simple monoverticillate (fig. 60D), 

 occasionally showing a prolongation of the main axis, or with 1 or 2 

 branches from lower nodes producing secondary verticils of sterigmata, 

 bearing conidial chains up to 50m or more in length, loosely parallel or 



Fig. 60. Penicilliuyn citreo-viride Biourge, NRRL 2047. A, B, and C, Two-week- 

 old colonies on Czapek, steep, and malt agars. D, Detail of small penicilli character- 

 istic of species, X 900. 



slightly diverging, not adherent into solid columns; sterigmata in compact 

 clusters of 8 to 12, mostly 9 to 12m by 2.2 to 2.8m, with fairly long conidial 

 tubes; conidia globose, 2.2 to 2.8m, thin-walled, smooth or nearly so, 

 adherent in chains with connectives evident. 



Colonies on steep agar growing more rapidly, 3.0 to 4.0 cm. wide in 2 

 weeks, broadly and radiately furrowed (fig. 60B), velvety in appearance, 



