U. fl.— Two •• Petals.;' (a, a bract : J, a hracteole) of a hop affected with " Hed mould." The 

 black specks X are the conceptacles containing the •• winter-spores." 



BIG. 7. --Conceptacles of hop-mildew bursting in the Bpring:— 6, the wall of the eoneeptacle 

 nas just burst, and the inner sac has begun to swell up; 1, the sac has swollen up to its full 

 extent, it tnensuddenly explodes, forcibly expelling the "winter-spores" througha slit (:i [.:,) 

 into the air : the empty sac then shrinks Lack (2). 



