1907.] Cherry Leaf Scorch* 337 



the contained spores are perfectly ripe and ready to infect a 

 leaf. These spores are then ejected with considerable force 



Fig. 3. — Photograph of a flowering branch of a cherry-tree attacked by the Cherry 

 Leaf Scorch fungus. The old, dead leaves, seen below the flowers, have remained 

 attached to the branch through the winter, and bear many hundreds of the fruit- 

 conceptacles of the fungus. These conceptacles become ripe during the spring, 

 and forcibly eject spores, which infect the young unfolding leaves, seen above 

 the flowers. 



from the mouth of each concept acle. Owing to the fact that 

 the old dead leaves bearing the fungus remain attached to the 

 branch, the spore-ejecting conceptacles are in close proximity 



(2061) Y 



