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A MANUAL OF THE ASPERGILLI 



Fig. 34. Ascospores representative of A, A. umbrosus, and B, A. echinulatus. In 

 each species upper left, right, and center spores represent surface profile views; 

 lower left, optical section in profile; lower center, surface in face view; and lower 

 right, optical section in face view. (Reprinted from Thorn and Raper, "The Asper- 

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



