Bui. Ill, Pt. V, Bureau cf Plant Industry, U. S. Dept. of Agriculture. 



Plate 



Tl 



-D 

 > 



z 



'' CD 



DO m 



O O 



O 3) 



2 > 



■ CO 



CO 



ro 



3J 



o 

 s 



c 



CO 



z 

 m 

 a) 



S 



CO 



31 



P 



10 



■| 

 > 



z 

 r 



XI 

 r 

 > 



o 

 -n 



CD 



3) 



o 



m 

 I 



O 

 > 



CO 

 CO 



CD 

 33 

 O 



c 



CO 



z 

 m 



3J 

 CO 



