1921.] 



Keversion of Blackcurrants. 



1125 



reverted bush grown under good cultural conditions be cut 

 to the ground, the following season's growth has quite large 

 leaves, which, at first sight, appear to be almost normal in 

 shape also, but their reverted state is revealed quickly by the 

 method outlined above. Conversely, small leaves are not 

 necessarily reverted : such leaves, quite normal in character, are 

 produced frequently both at the beginning and at the end of the 

 season. 



Fig. i. Fig. 2. 



Fig. 3. Fig. 4. Fig. 5. Fig. 7. 



Drawings of Blackcurrant Leaves showing successive Stages of Keversion. 

 The numbers indicate Submain Veins. 

 Fig. 1.— Normal Leaf. 

 Fig. 2-7. — Successive Stages of Reversion. 



