136 



A MANUAL OF THE ASPERGILLI 



in diameter, occasionally larger, commonly clustered, borne in an inter- 

 rupted surface felt of buff to brown hyphae; asci 15 to 17/z in diameter; 

 ascospores lenticular, mostly 7.2 to 7.8/i by 5.0 to 5.6/i, smooth-walled 



« 



i 



3 it I 





• 



I 





t%> a 



\ 





B 







^:D 



Fig. 35. Aspergillus glaucus group, conidial heads. A and B, A. niveo-glaucus, 

 NRRL No. 127: A, surface view showing loose, radiate character of heads, X 35; 

 B, photomicrograph of the same showing large, globose vesicle fertile over almost 

 the entire surface, X 600. C and D, Aspergillus restrictus, NRRL No. 154: C, surface 

 view showing long, columnar heads, X 120; D, photomicrograph of the same showing 

 characteristic small vesicle fertile on the uppermost surface only, X 600. 



except in equatorial area, furrows broad and shallow, ridges prominent, 

 roughened, rounded or acute and often appearing ragged. Conidial heads 

 abundant, white (fig. 35 A), often becoming browned in age, radiate, mostly 

 250 to 300 /x in diameter; conidiophores smooth-walled, colorless to brown, 



