42 



DISEASES OF FIELD & GARDEN CROPS. [CH. 



species of Puccinia these teleutospores germinate without 

 rest ; but in the majority of instances they hibernate or 

 rest in a quiescent state for eight, nine, or ten months ; 



FIG. 14. 



Pitccinia mixta, Fl. Teleutospores or resting-spores. 

 Enlarged 1000 diameters. 



they then germinate in the peculiar way described 

 further on under Puccinia graminis, Pers., one of the 

 fungi of corn mildew. The teleutospores of P. mixta. 



