Bulletin No. 22. v. p. v. 75. 



U. S. DEPARTMKN r ()F AGRICULTURE. 



DIVISION OF VEGETABLE PHYSIOLOGY AND PATHOLOGY. 

 B. T. GALLONA'AY, Ciiief. 



X E N I A, 



OR THE IMMEDIATI-: F.FM:CT OF POLLEN, 



IN MAIZE. 



HV 



HERBERT J. WEBBER, 

 In Cliarye oT Plant Breeciiny Laboratory. 



Issued September 12, 1900. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1900. 



