DESCRIPTION OF PLATE V. 



Terminal peach twigs badly affected by curl. The mycelium of the fimgus has 

 entered the growing end of these shoot«, and the conditions Ijeing favorable, it has 

 developed to such an extent as to prevent further elongation of the twig, thus form- 

 ing a compact head, with greatly shortened intemodes. It is in shoots of this char- 

 acter that the mycelium is found, and its extent is nearly coincident, so far as 

 observed, with the swollen portions of the branch. Such swollen branches consti- 

 tute a striking feature of the disease, but rarely involve more than 2 to 3 per cent of 

 the buds of a tree. Specimens were collected at Santa Ana in the spring of 1899 and 

 photographed natural size. (Compare with Pis. I and VI.) 



