THE USE OF THE MANUAL 91 



K. Conidiophores in yellow-brown shades L. 



KK. Conidiophores not colored 0. 



L. Conidial heads definitely green M. 



LL. Conidial heads greenish only when young, then in yel- 

 low-brown shades A . ustus 



M. Ascospores produced— purple-red in color A. nidulans group 



MM. Ascospores not produced N. 



N. Colonies showing irregularly clustered hiille cells A. caespitosus 



NN. Colonies not showing hulle cells: bright green, spreading A. unguis 



O. Conidial area in dull green shades (sometimes partially 



or completely replaced by tan) A. versicolor 



00. Conidial area in blue-greens A. sydowi 



P. Conidiophore walls smooth Q. 



PP. Conidiophore walls rough V. 



Q. Conidiophore walls pale yellow in outer layer; heads 



white when young often becoming avellaneous in age. A. flavipes 



QQ. Conidiophore walls colorless, or partially yellow-brown 



near the head R. 



R. Conidial chains in solid columns, compact at base S. 



RR. Conidial chains radiate at least in the larger and typical 



heads T. 



S. Conidial heads in avellaneous shades A. terreus 



SS. Conidial heads flesh color (in pinkish shades) A. carneus 



T. Heads white or tardily in yellowish shades A. candidus group 



TT Heads in darker colors U. 



U. Conidial heads globose in purple-brown to black, (rarely 



brown or paler) A . niger group 



UU. Conidial heads globose in yellowish, yellow-brown, and 



dark brown shades A . wentii group 



V. Conidiophore walls rough, yellow; heads yellow to 



ochre A . ochraceus group 



