THE ANNALS OF APPLIED BIOLOGY. VOL IV, NOS. 1 and 2 



PLATE 



Fig. 1. Diseased pollard beech showing gumming. 





■S!r%r 



Fig. 2. Graft made in September 1915. 

 Photographed in July lOlB to show 

 the gum exuding from the lower edge 

 of the graft at j. x i. 



Fig. 3. Bark of pollard infected with 

 living mycelium, July 1916. Photo- 

 graphed eight weeks later when 

 actively gumming, x i. 



Fig. 4. Masses of jiycnospores exuded through 

 cracks in the bark from the pycnidia on the 

 stroma beneath. x f . 



Fig. 5. Stroma exposed by the removal of the 

 superficial cork showing masses of pycnospores 

 at ..4, young apothecium B, and mature 



apothecium with hymenium exposed C, x 



