THE ASPERGILLUS GLAUCUS GROUP 



115 



over the colony (PI. Ill D; figs. 29 A and 30 A); reverse in shades of dark 

 red-brown. 



**m3& .& m® WW #M M 



_cor» 



Fig. 30. Diagramatic representation of cross sections of different colony types 

 in the Aspergillus ruber series developed at room temperature upon 20-percent sucrose 

 Czapek agar, showing relative abundance and disposition of the conidial heads (con) 

 and perithecia (per), and the amount and character of the mycelium (my) above the 

 substratum (sub) : A, Typical colony of A. ruber as seen in NRRL No. 52; B-F,atypica 

 colonies as seen respectively in NRRL No. 71, No. 70, No. 65, No. 75, and No. 76. 

 Scale approximate. (Reprinted from Thorn and Raper, "The Aspergillus glaucus 

 Group," U.S.D.A. Misc. Pub. 426: 1-46. 1941.) 



Perithecia very abundant, largely enmeshed in a felt at the agar surface 

 (fig. 30 A), yellow to orange-red, spherical to subspherical, mostly 80 to 

 120m though occasionally up to 140m in diameter; asci 12 to 15m; asco- 

 spores lenticular, 5.2 to 6.0m by 4.4 to 4.8m, with furrow generally evident 

 as a broad and shallow depression around the spore equator, ridges low and 



