CLASSIFICATION OF THE MOLDS 



63 



The key given in the footnote will enable the student to 

 separate some of the more common species. 1 



FlG. 42. ASPERGILLUS OBYZAE. 



i KEY TO ASPERGILLUS SPECIES 

 A. Spores white or nearly so. 



B. With unbranched sterigmata Aspergillus candidus. 



BB. With branched sterigmata A. albus. 



AA. Spores colored. 



B. Spores green, grayish, bluish or yellow- 

 ish-green, 

 r. With unbranched sterigmata. 



D. Producing perithecia readily. ^ 



E. Perithecium naked, not embedded. A. glaucus. 

 EE. Perithecium embedded. 



F. Tip of conidiophores only slightly 

 swollen, club-shaped* sterigmata 

 along sides for a considerable 



distance A. clavatus. 



FF. Tip of conidiophore hemi- 

 spherical, sterigmata produced 



only from terminal portion A. fumigatus. 



DD. Not producing perithecia (so far 

 as known). 

 E. Tip of conidiophore, very large, 



longates 80-100X500-800/A A. giganteus. 



EE. Tip of conidiophore smaller, 

 spherical, or hemispherical. 



F. Conidiophore rough, warty A. flaws. 



FF. Conidiophore smoother A. oryzae. 



CC. With branched sterigmata. 



D. Mycelium rusty brown A. versicolor. 



DD. Mycelium not so. 



